View source for 1980 Iowa highway transfer of jurisdiction

{{Short description|none}}
{{Use mdy dates|date=April 2014}}
{{Infobox state highway system
|title=Iowa Primary Highway System
|map={{maplink|frame=yes|plain=yes|frame-align=center|frame-width=300|frame-height=240|type=line|from=1980 Iowa highway transfer of jurisdiction.map}}
|map_custom=yes
|map_notes=Highways that changed jurisdiction around 1980<br>{{legend|#c00|Removed highways}}{{legend|#00f|Renumbered highways}}{{legend|#0f0|Added highways}}
|statehwy=Highway X (IA X or Iowa X)
|us=U.S. Highway X (US X)
|interstate=Interstate X (I-X)
|notes=Primary highways in Iowa are generally state-maintained.
|links=IA
}}
Beginning in 1979 and lasting through the early 1980s, a series of agreements between the [[Iowa Department of Transportation]] and individual county [[boards of supervisors]] led to a mass '''transfer of jurisdiction''' of several state highways in [[Iowa]].  County boards of supervisors were asked to convene functional classification boards in order to review the classification all of the highway miles within each respective county.  Control of roads that were classified as [[trunk road]]s or trunk collector roads were transferred to the counties, while roads classified as [[arterial road|arteries]] or arterial collectors were transferred to the state department of transportation.  The vast majority of transfers took place in 1980.

==Background==
The 67th [[Iowa General Assembly]] passed a bill in 1978 that changed how the state [[Iowa Department of Transportation|department of transportation]] (DOT) classified highways and how they were funded throughout the state.  The bill enacted an existing framework for county [[boards of supervisors]] to create reclassification boards that could appeal to a state board if certain changes to the road network were not satisfactory.  The state's road use tax fund, which is the mechanism for allocating funds to the different levels of government for different levels of road, had both its inputs and outputs modified.  The general fuel tax was raised from {{convert|7|to|8+1/2|¢/USgal}} for 1978 (equivalent to {{convert|{{inflation|US|7|1978}}|to|{{inflation|US|8.5|1978}}|¢/USgal}} in {{inflation/year|US}}), and to {{convert|10|¢/USgal|abbr=on}} for 1979 (equivalent to {{convert|{{inflation|US|10|1979}}|¢/USgal|abbr=on}} in {{inflation/year|US}}).{{inflation/fn|US}}<ref name=Assembly>{{cite act |type=Chapter |index=1108 |date=1978 |article=of the 67th General Assembly |article-type=Laws |legislature=[[Iowa General Assembly]] |title=Roads and Fuel Taxes |pages=575-588 |url=https://www.legis.iowa.gov/docs/publications/iactc/67.2/CH1108.pdf|access-date=August 19, 2020}}</ref>

The state was attempting to offset the effects the [[1970s energy crisis]] and the [[1973–75 recession]] which strained state budgets by reducing income due to reduced demand for gasoline and increasing inflation.<ref name="Evans">{{cite news |last1=Evans |first1=Randy |title=Officials Chafe at 'Inheriting' State Highways |url=https://www.newspapers.com/clip/57597413/officials-chafe-at-inheriting-state/ |access-date=August 19, 2020 |work=[[The Des Moines Register]] |date=August 17, 1980 |pages=1,12}}</ref>  The idea was for the DOT to save operational money by [[decommissioned highway|offloading]] minor highways to the respective [[Counties of Iowa|counties]].  In 1979, Iowa had the 9th largest public road system in the United States with over {{convert|113000|mi|km}} of roadways, {{convert|10000|mi|km}} of which were primary highways, comprising [[Interstate Highway]]s, [[U.S. Highway]]s, and [[State highway#United States|state highways]].  State planners sought to offload nearly one-third of the primary system.  Naturally, county officials, whose road budgets were similarly strained, balked at the idea.<ref name="Piller">{{cite news |last1=Piller |first1=Dan |title=Roads: An Explosive Issue for the 1980s |url=https://www.newspapers.com/clip/57596810/roads-an-explosive-issue-for-the-1980s/ |access-date=August 19, 2020 |work=[[The Des Moines Register]] |date=July 29, 1979 |page=1 |via=[[Newspapers.com]]}} {{open access}}</ref>

The Iowa Code provided a manner for determining the class of a particular highway.  Each county was to appoint a three-member board, one of whom was to be a state DOT employee, one a county engineer or supervisor, and the other a municipal leader chosen by a majority of mayors in the county.  The board was to classify each mile of roads and streets in the county into one of twelve categories.  Only three categories applied to primary highways–freeways and expressways, arterials, and arterial connectors.  The freeway-expressway and arterial systems had limits on total mileage, {{convert|2660|and|3500|mi|km}}, respectively.  The only other requirement of the reclassification boards was to ensure network continuity between counties.<ref name=Code>{{cite book |date=1978 |article=Establishment, Alteration, and Vacation of Highways |last=1979 Iowa Code |author-link=Code of Iowa |title=§§306.1–306.42 |pages=1397–1405 |url=https://www.legis.iowa.gov/docs/shelves/code/ocr/1979%20Iowa%20Code.pdf}}</ref>  Ultimately, these boards found about {{convert|1000|mi|km}} of minor highways that were on the primary system and {{convert|400|mi|km}} of major highways on the secondary system.<ref name="Piller" />

County officials were not keen on the idea of taking over more highway miles from the state when their own road budgets were tight.  [[Clarke County, Iowa|Clarke County]] officials sued the state classification board when it suggested the county take over an {{convert|11|mi|km|adj=on}} portion of [[U.S. Route 69 in Iowa|U.S. Highway 69]] (US&nbsp;69).  They felt the DOT was attempting to dump unwanted highway miles, which were also in poor condition, on a county unwilling to accept them.<ref name="Evans" />  Some counties felt pressure to accept roads from the state that the DOT had not maintained adequately.<ref>{{cite news |last1=Hoffmann |first1=Rep. Betty |title=Legislative report... |url=https://www.newspapers.com/clip/57686336/legislative-report/ |access-date=August 20, 2020 |work=[[The Muscatine Journal]] |date=March 18, 1980 |page=4 |via=[[Newspapers.com]]}} {{open access}}</ref>  [[Grundy County, Iowa|Grundy County]] had some success by reclassifying some roads slated for transfer, such as [[Iowa Highway 214]] (Iowa&nbsp;214) into [[Wellsburg, Iowa|Wellsburg]].  That highway was reclassified as an arterial collector extension, keeping in spirit with an agreement it had with the DOT to maintain the highway until "[[U.S. Route 20 in Iowa|Interstate 520]]" was built.<ref name="Schmidt">{{cite news |last1=Schmidt |first1=Vernice |title=Grundy County Wins First Round in Battle on Highway Jurisdiction |url=https://www.newspapers.com/clip/57597026/grundy-county-wins-first-round-in/ |access-date=August 20, 2020 |work=[[The Waterloo Courier]] |date=August 31, 1979 |page=16 |via=[[Newspapers.com]]}} {{open access}}</ref>  Other counties had appeals heard at the DOT headquarters in [[Ames, Iowa|Ames]].<ref>{{cite news |last1=<!-- no byline --> |title=Lyon, Sioux Roads Reshuffle Talk Set |url=https://www.newspapers.com/clip/57597865/lyon-sioux-roads-reshuffle-talk-set/ |access-date=August 20, 2020 |work=[[Sioux City Journal]] |date=December 13, 1980 |page=3 |via=[[Newspapers.com]]}} {{open access}}</ref>

Construction of new highways, such as [[Interstate 380 (Iowa)|Interstate 380]] (I-380) would cause a chain reaction in other state highways.  It was predicted in 1979 that opening I-380 in the [[Cedar Rapids, Iowa|Cedar Rapids]] area would cause [[Iowa Highway 150|Iowa&nbsp;150]] to lose its status as a primary highway because the route ran roughly parallel to the planned Interstate Highway's corridor.<ref>{{cite news |last1=<!-- no byline --> |title=Section of Highway 150 May Lose Primary Status |url=https://www.newspapers.com/clip/57596931/section-of-highway-150-may-lose-primary/ |access-date=August 20, 2020 |work=[[The Gazette (Cedar Rapids, Iowa)|The Gazette]] |date=August 19, 1979 |location=Cedar Rapids |page=20A |via=[[Newspapers.com]]}} {{open access}}</ref>  Indeed, when I-380 opened to traffic in 1984, Iowa&nbsp;150 was rerouted away from Cedar Rapids over [[Iowa Highway 101|Iowa&nbsp;101]] to [[Vinton, Iowa|Vinton]].  One section of Iowa&nbsp;150 along Collins Road in Cedar Rapids was still classified as an arterial connector; it became [[Iowa Highway 100|Iowa&nbsp;100]].

One provision in the Iowa Code required whichever agency maintained a section of highway previously to either repair the highway in question or to pay an appropriate amount of money equal to the costs of repairing the road to the agency receiving the road.{{sfnp|1979 Iowa Code|1978|p=1400}}  In [[Johnson County, Iowa|Johnson County]], state and county officials had difficulty reaching an agreement on a former segment of [[Iowa Highway 1|Iowa&nbsp;1]], by then renumbered [[Iowa Highway 979|Iowa&nbsp;979]].  County officials wanted the state to take over County Road W66 (CR&nbsp;W66) from [[Interstate 80 in Iowa|I-80]] to the west overlook of [[Coralville Lake]].  The state countered with an offer to pay to upgrade Iowa&nbsp;979 as well as have the county take over three other highways in the county.<ref name="Bunton">{{cite news |last1=Bunton |first1=Kristie |title=Local Road: The Old Highway Nobody Wants |url=https://www.newspapers.com/clip/57687403/local-road-the-old-highway-nobody-wants/ |access-date=August 20, 2020 |work=[[Iowa City Press-Citizen]] |date=January 18, 1984 |page=2 |via=[[Newspapers.com]]}} {{open access}}</ref>  The two sides were not any closer 18 months later when the DOT was ready to open a new four-lane [[U.S. Route 218|US&nbsp;218]] south of [[Iowa City, Iowa|Iowa City]].<ref name="Walsh">{{cite news |last1=Walsh |first1=Tom |title=IDOT Officials May Hope to Open Highway, Close Deal |url=https://www.newspapers.com/clip/57689199/idot-officials-may-hope-to-open/ |access-date=August 20, 2020 |work=[[The Gazette (Cedar Rapids, Iowa)|The Gazette]] |date=June 25, 1985 |location=Cedar Rapids |page=11 |via=[[Newspapers.com]]}} {{open access}}</ref>  The routes for which no agreement could be made were ultimately kept by the DOT and assigned new route numbers, as was the case with Iowa&nbsp;979.

==Routes removed==
Lengths represent the distances removed from the state highway system
{{Routelist top|length_ref=<ref name=DOT1978>{{IowaDOT|year=1978|2020-08-19}}</ref>}}
{{Routelist row
|state=IA
|type=IA 1961
|route=27
|dab=1930–1980
|length_mi=6.86
|terminus_a=[[Alvord, Iowa|Alvord]]
|terminus_b=[[U.S. Route 75 in Iowa|US&nbsp;75]] near [[Rock Rapids, Iowa|Rock Rapids]]
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=42
|length_mi=4.18
|terminus_a=<span class="nowrap">[[U.S. Route 275|US&nbsp;275]]</span> / <span class="nowrap">[[Iowa Highway 2|Iowa&nbsp;2]]</span> near [[Sidney, Iowa|Sidney]]
|terminus_b=[[Riverton, Iowa|Riverton]]
|established=1920
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=43
|length_mi=1.58
|terminus_a=[[Ringsted, Iowa|Ringsted]]
|terminus_b=[[Iowa Highway 15|Iowa&nbsp;15]] near Ringsted
|established=1920
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=47
|length_mi=0.82
|terminus_a=[[Iowa Highway 14|Iowa&nbsp;14]] near [[Allison, Iowa|Allison]]
|terminus_b=Allison
|established=1951
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=54
|length_mi=2.99
|terminus_a=[[Marble Rock, Iowa|Marble Rock]]
|terminus_b=[[Iowa Highway 14|Iowa&nbsp;14]] east of Marble Rock
|established=1920
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=77
|length_mi=7.80
|terminus_a=[[Iowa Highway 78|Iowa&nbsp;78]] at [[Richland, Iowa|Richland]]
|terminus_b=[[Iowa Highway 92|Iowa&nbsp;92]] at [[Keota, Iowa|Keota]]
|established=1920
|decommissioned=2003
|notes=Segment into Keota remained
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=79
|dab=1920–1980
|length_mi=1.74
|terminus_a=[[Iowa Highway 2|Iowa&nbsp;2]] near [[Bonaparte, Iowa|Bonaparte]]
|terminus_b=Bonaparte
|established=1920
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=84
|length_mi=2.13
|terminus_a=[[The Eastern Iowa Airport]]
|terminus_b=[[Interstate 380 (Iowa)|I-380]] near [[Cedar Rapids, Iowa|Cedar Rapids]]
|established=1943
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=86
|dab=1945–1980
|length_mi=0.47
|terminus_a=[[Fertile, Iowa|Fertile]]
|terminus_b=[[Iowa Highway 9|Iowa&nbsp;9]] at Fertile
|established=1945
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=87
|length_mi=4.06
|terminus_a=[[U.S. Route 69 in Iowa|US&nbsp;69]] west of Elkhart
|terminus_b=[[Elkhart, Iowa|Elkhart]]
|established=1920
|decommissioned=1983
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=88
|length_mi=8.01
|terminus_a=[[U.S. Route 61 in Iowa|US&nbsp;61]]&nbsp;/ [[Iowa Highway 2|Iowa&nbsp;2]] in [[Fort Madison, Iowa|Fort Madison]]
|terminus_b=[[Iowa Highway 16|Iowa&nbsp;16]] in [[Denmark, Iowa|Denmark]]
|established=1940
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=89
|length_mi=7.69
|terminus_a=[[Iowa Highway 141|Iowa&nbsp;141]] near [[Woodward, Iowa|Woodward]]
|terminus_b=[[Iowa Highway 17|Iowa&nbsp;17]] in [[Madrid, Iowa|Madrid]]
|established=1946
|decommissioned=1980
|notes=Replaced by an extended Iowa&nbsp;210
}}
{{routelist row
|state=IA
|type=IA 1961
|route=90
|length_mi=16.32
|terminus_a=[[Interstate 80 in Iowa|I-80]] in [[Dallas County, Iowa|Dallas County]]
|terminus_b=[[Interstate 35 in Iowa|I-35]] in [[West Des Moines, Iowa|Des Moines]]
|established=1932
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=91
|dab=1940-1980
|length_mi=4.18
|terminus_a=[[Ledyard, Iowa|Ledyard]]
|terminus_b=[[U.S. Route 169 in Iowa|US&nbsp;169]] near Ledyard
|established=1940
|decommissioned=1980-05
|notes=none
}}
{{routelist row
|state=IA
|type=IA 1961
|route=95
|length_mi=3.70
|terminus_a=[[Carbon, Iowa|Carbon]]
|terminus_b=[[Iowa Highway 148|Iowa&nbsp;148]] north of [[Corning, Iowa|Corning]]
|established=1932
|decommissioned=1983
|notes=none
}}
{{routelist row
|state=IA
|type=IA 1961
|route=101
|length_mi=15.56
|terminus_a=[[U.S. Route 218|US&nbsp;218]] in [[Vinton, Iowa|Vinton]]
|terminus_b=[[Iowa Highway 150|Iowa&nbsp;150]] north of [[Urbana, Iowa|Urbana]]
|established=1920
|decommissioned=1984
|notes=Replaced by a relocated Iowa 150
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=102
|dab=1920–1980
|length_mi=1.82
|terminus_a=[[Hawkeye, Iowa|Hawkeye]]
|terminus_b=[[U.S. Route 18 in Iowa|US&nbsp;18]] near Hawkeye
|established=1920
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=104
|length_mi=1.53
|terminus_a=[[Woodburn, Iowa|Woodburn]]
|terminus_b=[[U.S. Route 34 in Iowa|US&nbsp;34]] near Woodburn
|established=1927
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=106
|length_mi=8.98
|terminus_a=[[Iowa Highway 107|Iowa&nbsp;107]] in [[Clear Lake, Iowa|Clear Lake]]
|terminus_b=[[U.S. Route 65 in Iowa|US&nbsp;65]] in [[Mason City, Iowa|Mason City]]
|established=1920
|decommissioned=1980
|notes=&nbsp;
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=108
|length_mi=1.18
|terminus_a=[[Delta, Iowa|Delta]]
|terminus_b=[[Iowa Highway 92|Iowa&nbsp;92]] near Delta
|established=1923
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=112
|length_mi=5.19
|terminus_a=[[Volga, Iowa|Volga]]
|terminus_b=[[Iowa Highway 13|Iowa&nbsp;13]] near [[Osborne, Iowa|Osborne]]
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=114
|length_mi=9.20
|established=1969-01
|decommissioned=1981
|terminus_a=[[Iowa Highway 92|Iowa&nbsp;92]] near [[West Chester, Iowa|West Chester]]
|terminus_b=[[Iowa Highway 22|Iowa&nbsp;22]] at [[Wellman, Iowa|Wellman]]
|notes=Previously Iowa 81
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=119
|length_mi=1.04
|terminus_a=[[Dorchester, Iowa|Dorchester]]
|terminus_b=[[Iowa Highway |Iowa&nbsp;76]] near Dorchester
|established=1923
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=120
|length_mi=0.80
|terminus_a=[[Stanton, Iowa|Stanton]]
|terminus_b=[[U.S. Route 34 in Iowa|US&nbsp;34]] near Stanton
|established=1924
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=123
|length_mi=0.45
|terminus_a=[[U.S. Route 34 in Iowa|US&nbsp;34]] near [[Rome, Iowa|Rome]]
|terminus_b=Rome
|established=1970
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=125
|length_mi=3.26
|terminus_a=[[Salem, Iowa|Salem]]
|terminus_b=[[U.S. Route 218|US&nbsp;218]] near Salem
|established=1924
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=126
|length_mi=0.97
|terminus_a=[[U.S. Route 6 in Iowa|US&nbsp;6]] near [[Mitchellville, Iowa|Mitchellville]]
|terminus_b=Mitchellville
|established=1924
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=134
|dab=1935–1980
|length_mi=4.06
|terminus_a=[[U.S. Route 65 in Iowa|US&nbsp;65]] near [[Hampton, Iowa|Hampton]]
|terminus_b=[[Geneva, Iowa|Geneva]]
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=135
|length_mi=1.96
|terminus_a=[[Montour, Iowa|Montour]]
|terminus_b=[[U.S. Route 30 in Iowa|US&nbsp;30]] near Montour
|established=1954
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=152
|dab=1926–1980
|length_mi=1.31
|terminus_a=[[U.S. Route 34 in Iowa|US&nbsp;34]] near [[Murray, Iowa|Murray]]
|terminus_b=Murray
|established=1926
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=155
|length_mi=3.05
|terminus_a=[[Nodaway, Iowa|Nodaway]]
|terminus_b=[[U.S. Route 34 in Iowa|US&nbsp;34]] near Nodaway
|established=1933
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=156
|length_mi=0.33
|terminus_a=[[Bussey, Iowa|Bussey]] city limits
|terminus_b=Bussey
|established=
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=159
|length_mi=1.83
|terminus_a=[[Iowa Highway 92|Iowa&nbsp;92]] near [[Harper, Iowa|Harper]]
|terminus_b=Harper
|established=1929
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=166
|length_mi=0.57
|terminus_a=[[Hastings, Iowa|Hastings]]
|terminus_b=[[U.S. Route 34 in Iowa|US&nbsp;34]] near Hastings
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=167
|length_mi=3.21
|terminus_a=[[Doon, Iowa|Doon]]
|terminus_b=[[U.S. Route 75 in Iowa|US&nbsp;75]] near Doon
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=168
|length_mi=2.70
|terminus_a=[[Iowa Highway 93|Iowa&nbsp;83]] near [[Minden, Iowa|Minden]]
|terminus_b=[[Shelby, Iowa|Shelby]]
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=171
|length_mi=1.05
|terminus_a=[[Elberon, Iowa|Elberon]]
|terminus_b=[[Iowa Highway 21|Iowa&nbsp;21]] near Elberon
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=172
|length_mi=4.23
|terminus_a=[[Elgin, Iowa|Elgin]]
|terminus_b=[[U.S. Route 18 in Iowa|US&nbsp;18]] in [[Clermont, Iowa|Clermont]]
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=177
|length_mi=3.20
|terminus_a=[[Iowa Highway 9|Iowa&nbsp;9]] near [[Osage, Iowa|Osage]]
|terminus_b=[[Elgin, Iowa|Elgin]]
|established=1937
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=178
|length_mi=0.98
|terminus_a=[[Iowa Highway 9|Iowa&nbsp;9]] near [[Little Rock, Iowa|Little Rock]]
|terminus_b=Little Rock
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=179
|length_mi=0.76
|terminus_a=[[U.S. Route 69 in Iowa|US&nbsp;69]] near [[Klemme, Iowa|Klemme]]
|terminus_b=Klemme
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=180
|length_mi=2.46
|terminus_a=[[Hayesville, Iowa|Hayesville]]
|terminus_b=[[Iowa Highway 149|Iowa&nbsp;149]] near Hayesville
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=186
|dab=1930–1980
|length_mi=3.27
|terminus_a=[[U.S. Route 34 in Iowa|US&nbsp;34]] near [[Prescott, Iowa|Prescott]]
|terminus_b=Prescott
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=189
|length_mi=1.00
|terminus_a=[[Bridgewater, Iowa|Bridgewater]]
|terminus_b=[[Iowa Highway 92|Iowa&nbsp;92]] north or Bridgwater
|established=1930
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=190
|length_mi=7.46
|terminus_a=[[Fairbank, Iowa|Fairbank]]
|terminus_b=[[Iowa Highway 150|Iowa&nbsp;150]] near [[Oelwein, Iowa|Oelwein]]
|established=1931
|decommissioned=1980
|notes=Replaced by Iowa&nbsp;281
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=198
|length_mi=0.43
|terminus_a=[[Garrison, Iowa|Garrison]]
|terminus_b=Garrison city limits
|established=
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=199
|length_mi=0.54
|terminus_a=[[Van Horne, Iowa|Van Horne]] city limits
|terminus_b=Van Horne
|established=
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=200
|length_mi=0.59
|terminus_a=[[Keystone, Iowa|Keystone]] city limits
|terminus_b=Keystone
|established=
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=203
|length_mi=8.78
|terminus_a=[[Terril, Iowa|Terril]]
|terminus_b=[[Iowa Highway 9|Iowa&nbsp;9]] near [[Superior, Iowa|Superior]]
|established=1920
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=213
|length_mi=3.72
|terminus_a=[[Blakesburg, Iowa|Blakesburg]]
|terminus_b=[[U.S. Route 34 in Iowa|US&nbsp;34]] north or Blakesburg
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=216
|length_mi=1.70
|terminus_a=[[Iowa Highway 5|Iowa&nbsp;5]]
|terminus_b=[[Exline, Iowa|Exline]]
|established=1931
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=219
|length_mi=1.53
|terminus_a=[[Iowa Highway 9|Iowa&nbsp;9]] near [[Lake Park, Iowa|Lake Park]]
|terminus_b=Lake Park
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=221
|length_mi=2.44
|terminus_a=[[U.S. Route 69 in Iowa|US&nbsp;69]] near [[Story City, Iowa|Story City]]
|terminus_b=[[Interstate 35 in Iowa|I-35]] near Story City
|established=
|decommissioned=2003
|notes=Segment from I-35 to [[Roland, Iowa|Roland]] remained
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=222
|length_mi=14.72
|terminus_a=[[Iowa Highway 15|Iowa&nbsp;15]] near [[Ottosen, Iowa|Ottosen]]
|terminus_b=[[Livermore, Iowa|Livermore]]
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=226
|length_mi=10.78
|terminus_a=[[U.S. Route 18 in Iowa|US&nbsp;18]] near [[Wesley, Iowa|Wesley]]
|terminus_b=[[Titonka, Iowa|Titonka]]
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=231
|dab=1931–1981
|length_mi=1.83
|terminus_a=[[Iowa Highway 10|Iowa&nbsp;10]] near Ireton
|terminus_b=[[Ireton, Iowa|Ireton]]
|established=1931
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=232
|length_mi=1.99
|terminus_a=[[Earlham, Iowa|Earlham]]
|terminus_b=[[Interstate 80 in Iowa|I-80]] near Earlham
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=237
|length_mi=1.23
|terminus_a=[[Ocheyedan, Iowa|Ocheyedan]]
|terminus_b=[[Iowa Highway 9|Iowa&nbsp;9]] near Ocheyedan
|established=1931
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=241
|length_mi=0.99
|terminus_a=[[Readlyn, Iowa|Readlyn]]
|terminus_b=[[Iowa Highway 3|Iowa&nbsp;3]] near Readlyn
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=243
|dab=1931–1980
|length_mi=7.97
|terminus_a=[[Iowa Highway 140|Iowa&nbsp;140]] near [[Kingsley, Iowa|Kingsley]]
|terminus_b=[[Pierson, Iowa|Pierson]]
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=244
|dab=1931–1980
|length_mi=1.96
|terminus_a=[[Henderson, Iowa|Henderson]]
|terminus_b=[[U.S. Route 59 in Iowa|US&nbsp;59]]
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=246
|length_mi=3.26
|terminus_a=[[U.S. Route 61 in Iowa|US&nbsp;61]] in [[Zwingle, Iowa|Zwingle]]
|terminus_b=[[La Motte, Iowa|La Motte]]
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=248
|length_mi=0.49
|terminus_a=[[Independence State Hospital]]
|terminus_b=[[U.S. Route 20 in Iowa|US&nbsp;20]] in [[Independence, Iowa|Independence]]
|established=1931
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=250
|length_mi=0.59
|terminus_a=[[Lakota, Iowa|Lakota]]
|terminus_b=[[U.S. Route 169 in Iowa|US&nbsp;169]]&nbsp;/ [[Iowa Highway 9|Iowa&nbsp;9]] near Lakota
|established=1932
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=251
|length_mi=1.71
|terminus_a=[[St. Charles, Iowa|St. Charles]]
|terminus_b=[[Interstate 35 in Iowa|I-35]] near St. Charles
|established=1932
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=254
|dab=1969–1980
|length_mi=7.91
|terminus_a=[[Iowa Highway 9|Iowa&nbsp;9]] near [[Buffalo Center, Iowa|Buffalo Center]]
|terminus_b=[[Minnesota State Highway 254|MN&nbsp;254]] near [[Rake, Iowa|Rake]]
|established=1969
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=255
|length_mi=2.26
|terminus_a=[[Orchard, Iowa|Orchard]]
|terminus_b=[[U.S. Route 218|US&nbsp;218]] near Orchard
|established=1932
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=256
|length_mi=0.80
|terminus_a=[[Iowa Highway 17|Iowa&nbsp;17]] near [[Corwith, Iowa|Corwith]]
|terminus_b=Corwith
|established=1932
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=259
|length_mi=0.45
|terminus_a=[[Tingley, Iowa|Tingley]] city limits
|terminus_b=Tingley
|established=
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=262
|length_mi=1.99
|terminus_a=[[U.S. Route 69 in Iowa|US&nbsp;69]] near [[Galt, Iowa|Galt]]
|terminus_b=Galt
|established=1933
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=263
|dab=1933–1980
|length_mi=2.02
|terminus_a=[[Coulter, Iowa|Coulter]]
|terminus_b=[[Latimer, Iowa|Latimer]]
|established=1933
|decommissioned=1980
|notes=Double spur route with [[Iowa Highway 3|Iowa&nbsp;3]]
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=264
|length_mi=2.39
|terminus_a=[[Linn Grove, Iowa|Linn Grove]]
|terminus_b=[[Iowa Highway 10|Iowa&nbsp;10]] near Linn Grove
|established=1933
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=266
|length_mi=0.12
|terminus_a=[[Weldon, Iowa|Weldon]] city limits
|terminus_b=Weldon
|established=
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=267
|length_mi=1.19
|terminus_a=[[Iowa Highway 93|Iowa&nbsp;93]] near [[Randalia, Iowa|Randalia]]
|terminus_b=Randalia
|established=1934
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=269
|length_mi=3.01
|terminus_a=[[Iowa Highway 16|Iowa&nbsp;16]] near [[Stockport, Iowa|Stockport]]
|terminus_b=Stockport
|established=1934
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=270
|length_mi=1.80
|terminus_a=[[Iowa Highway 16|Iowa&nbsp;16]] near [[Hillsboro, Iowa|Hillsboro]]
|terminus_b=Hillsboro
|established=1934
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=271
|length_mi=0.84
|terminus_a=[[Iowa Highway 4|Iowa&nbsp;4]] near [[Yale, Iowa|Yale]]
|terminus_b=Yale
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=277
|length_mi=6.24
|terminus_a=[[Numa, Iowa|Numa]]
|terminus_b=[[Iowa Highway 5|Iowa&nbsp;5]] near [[Centerville, Iowa|Centerville]]
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=278
|length_mi=2.05
|terminus_a=[[Rathbun, Iowa|Rathbun]]
|terminus_b=[[Iowa Highway 5|Iowa&nbsp;5]] near Rathbun
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=279
|length_mi=0.72
|terminus_a=[[Atkins, Iowa|Atkins]] city limits
|terminus_b=Atkins
|established=
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=284
|length_mi=5.58
|terminus_a=[[Aurora, Iowa|Aurora]]
|terminus_b=[[Iowa Highway 187|Iowa&nbsp;187]] at [[Lamont, Iowa|Lamont]]
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=287
|length_mi=0.42
|terminus_a=[[Newhall, Iowa|Newhall]] city limits
|terminus_b=Newhall
|established=
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=288
|length_mi=4.58
|terminus_a=[[U.S. Route 65 in Iowa|US&nbsp;65]] near [[Manly, Iowa|Manly]]
|terminus_b=[[Plymouth, Iowa|Plymouth]]
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=289
|dab=1935–1980
|length_mi=6.14
|terminus_a=[[Alta Vista, Iowa|Alta Vista]]
|terminus_b=[[U.S. Route 63 in Iowa|US&nbsp;63]] near [[Lourdes, Iowa|Lourdes]]
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=290
|length_mi=1.99
|terminus_a=[[Farmersburg, Iowa|Farmersburg]]
|terminus_b=[[Iowa Highway 13|Iowa&nbsp;13]] near Farmersburg
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=291
|length_mi=1.01
|terminus_b=[[U.S. Route 30 in Iowa|US&nbsp;30]] near Low Moor
|terminus_a=[[Low Moor, Iowa|Low Moor]]
|established=1935
|decommissioned=1979
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=292
|length_mi=3.17
|terminus_a=[[Linden, Iowa|Linden]]
|terminus_b=[[Iowa Highway 44|Iowa&nbsp;44]]
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=293
|length_mi=1.42
|terminus_a=[[Iowa Highway 90|Iowa&nbsp;90]] near [[Van Meter, Iowa|Van Meter]]
|terminus_b=Van Meter
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=295
|length_mi=5.09
|terminus_a=[[Westgate, Iowa|Westgate]]
|terminus_b=[[Iowa Highway 150|Iowa&nbsp;150]] near [[Maynard, Iowa|Maynard]]
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=296
|dab=1935–1980
|length_mi=4.44
|terminus_a=CR&nbsp;C24 near [[Wadena, Iowa|Wadena]]
|terminus_b=[[Iowa Highway 56|Iowa&nbsp;56]] near Wadena
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=302
|length_mi=3.00
|terminus_a=[[Thor, Iowa|Thor]]
|terminus_b=[[Iowa Highway 3|Iowa&nbsp;3]] near Thor
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=303
|length_mi=3.51
|terminus_a=[[U.S. Route 34 in Iowa|US&nbsp;34]] near [[Fairfield, Iowa|Fairfield]]
|terminus_b=[[Libertyville, Iowa|Libertyville]]
|established=1935
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=304
|length_mi=1.59
|terminus_a=[[Iowa Highway 78|Iowa&nbsp;78]] near [[Ollie, Iowa|Ollie]]
|terminus_b=Ollie
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=309
|length_mi=2.32
|terminus_a=[[Beacon, Iowa|Beacon]]
|terminus_b=[[Iowa Highway 137|Iowa&nbsp;137]] in [[Oskaloosa, Iowa|Oskaloosa]]
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=311
|length_mi=0.55
|terminus_a=[[Liscomb, Iowa|Liscomb]]
|terminus_b=Liscomb city limits
|established=1935
|decommissioned=1989
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=312
|dab=1935–1980
|length_mi=5.70
|terminus_a=[[Iowa Highway 9|Iowa&nbsp;9]] near [[Riceville, Iowa|Riceville]]
|terminus_b=[[McIntire, Iowa|McIntire]]
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=313
|length_mi=2.03
|terminus_a=[[Melvin, Iowa|Melvin]] city limits
|terminus_b=Melvin
|established=1935
|decommissioned=2002
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=317
|length_mi=0.81
|terminus_a=[[U.S. Route 65 in Iowa|US&nbsp;65]] near [[Zearing, Iowa|Zearing]]
|terminus_b=Zearing
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=318
|length_mi=5.51
|terminus_a=[[Clutier, Iowa|Clutier]]
|terminus_b=[[Iowa Highway 21|Iowa&nbsp;21]] near Clutier
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=319
|length_mi=0.50
|terminus_a=[[Gravity, Iowa|Gravity]]
|terminus_b=[[Iowa Highway 148|Iowa&nbsp;148]] at Gravity
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=323
|length_mi=3.74
|terminus_a=[[Iowa Highway 17|Iowa&nbsp;17]] near [[Woolstock, Iowa|Woolstock]]
|terminus_b=Woolstock
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=325
|length_mi=0.47
|terminus_a=[[Spillville, Iowa|Spillville]]
|terminus_b=Spillville city limits
|established=1935
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=326
|length_mi=2.18
|terminus_a=[[Bristow, Iowa|Bristow]]
|terminus_b=[[Iowa Highway 3|Iowa&nbsp;3]] near Bristow
|established=1935
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=328
|length_mi=2.29
|terminus_a=[[U.S. Route 20 in Iowa|US&nbsp;20]] near [[Galva, Iowa|Galva]]
|terminus_b=Galva
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=329
|length_mi=4.85
|terminus_a=[[U.S. Route 169 in Iowa|US&nbsp;169]] at [[Boxholm, Iowa|Boxholm]]
|terminus_b=[[Pilot Mound, Iowa|Pilot Mound]]
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=332
|length_mi=1.00
|terminus_a=[[Pilot Knob State Park]]
|terminus_b=[[Iowa Highway 9|Iowa&nbsp;9]] near [[Forest City, Iowa|Forest City]]
|established=1935
|decommissioned=1980
|notes=Park access road
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=334
|dab=1935–1980
|length_mi=1.87
|terminus_a=[[U.S. Route 63 in Iowa|US&nbsp;63]] near [[Frederika, Iowa|Frederika]]
|terminus_b=Frederika
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=335
|dab=1935–1980
|length_mi=0.64
|terminus_a=[[Iowa Highway 141|Iowa&nbsp;141]] near [[Dawson, Iowa|Dawson]]
|terminus_b=Dawson
|established=1935
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=336
|length_mi=2.48
|terminus_a=[[Iowa Highway 150|Iowa&nbsp;150]] near [[Rowley, Iowa|Rowley]]
|terminus_b=Rowley
|established=1936
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=337
|dab=1936–1980
|length_mi=3.36
|terminus_a=[[Iowa Highway 9|Iowa&nbsp;9]] near [[Grafton, Iowa|Grafton]]
|terminus_b=Grafton
|established=1936
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=342
|dab=1936–1980
|length_mi=0.95
|terminus_a=[[Iowa Highway 141|Iowa&nbsp;141]] near [[Jamaica, Iowa|Jamaica]]
|terminus_b=Jamaica
|established=1936
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=343
|length_mi=1.01
|terminus_a=[[#IA_19610333|Iowa&nbsp;333]] near [[Northboro, Iowa|Northboro]]
|terminus_b=Northboro
|established=1937
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=351
|length_mi=0.86
|terminus_a=[[Rembrandt, Iowa|Rembrandt]]
|terminus_b=[[U.S. Route 71 in Iowa|US&nbsp;71]] near Rembrandt
|established=1938
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=352
|length_mi=0.75
|terminus_a=[[U.S. Route 71 in Iowa|US&nbsp;71]] near [[Truesdale, Iowa|Truesdale]]
|terminus_b=Truesdale
|established=1938
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=353
|length_mi=0.35
|terminus_a=[[Rowan, Iowa|Rowan]]
|terminus_b=[[Iowa Highway 3|Iowa&nbsp;3]] at Rowan
|established=1938
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=356
|dab=1938–1981
|length_mi=6.37
|terminus_a=[[Packwood, Iowa|Packwood]]
|terminus_b=[[Iowa Highway 1|Iowa&nbsp;1]] near Packwood
|established=1938
|decommissioned=1981
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=358
|length_mi=1.55
|terminus_a=[[Whittemore, Iowa|Whittemore]]
|terminus_b= [[U.S. Route 18 in Iowa|US&nbsp;18]]&nbsp;/ [[Iowa Highway 15 |Iowa&nbsp;15]] near Whittemore
|established=1938
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=362
|dab=1938–1980
|length_mi=1.17
|terminus_a=[[Macedonia, Iowa|Macedonia]]
|terminus_b=[[U.S. Route 59 in Iowa|US&nbsp;59]] near Macedonia
|established=1938
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=364
|length_mi=0.74
|terminus_a=[[Cota Creek (Mississippi River)|Cota Creek]]
|terminus_b=[[Harpers Ferry, Iowa|Harpers Ferry]]
|established=1938
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=365
|length_mi=1.07
|terminus_a=[[Tracy, Iowa|Tracy]]
|terminus_b=[[Iowa Highway 92|Iowa&nbsp;92]] near Tracy
|established=1939
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=367
|length_mi=3.39
|terminus_a=[[Rutland, Iowa|Rutland]]
|terminus_b=[[U.S. Route 169 in Iowa|US&nbsp;169]] near [[Humboldt, Iowa|Humboldt]]
|established=1942
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=369
|length_mi=5.54
|terminus_a=[[Iowa Highway 2|Iowa&nbsp;2]] near [[Moulton, Iowa|Moulton]]
|terminus_b=[[Unionville, Iowa|Unionville]]
|established=1942
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=374
|dab=1942–1980
|length_mi=7.99
|terminus_a=[[U.S. Route 71 in Iowa|US&nbsp;71]] near [[Sioux Rapids, Iowa|Sioux Rapids]]
|terminus_b=[[Webb, Iowa|Webb]]
|established=1942
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=377
|length_mi=0.51
|terminus_a=Harbor Drive in [[Sioux City, Iowa|Sioux City]]
|terminus_b=[[Iowa Highway 970|Iowa&nbsp;970]] in [[Sergeant Bluff, Iowa|Sergeant Bluff]]
|established=1942
|decommissioned=1980
|notes=Airport access road
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=379
|length_mi=4.59
|terminus_a=[[Joice, Iowa|Joice]]
|terminus_b=[[Iowa Highway 105|Iowa&nbsp;105]] near [[Lake Mills, Iowa|Lake Mills]]
|established=1942
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=381
|length_mi=0.67
|terminus_a=[[#IA_19610254|Iowa&nbsp;254]] near [[Rake, Iowa|Rake]]
|terminus_b=Rake
|established=1954
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=387
|length_mi=0.52
|terminus_a=[[Davenport Municipal Airport (Iowa)|Davenport Municipal Airport]]
|terminus_b=[[U.S. Route 61 in Iowa|US&nbsp;61]] 3 miles north of [[Davenport, Iowa|Davenport]]
|established=1951
|decommissioned=1979
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=388
|length_mi=0.35
|terminus_a=[[Calumet, Iowa|Calumet]]
|terminus_b=[[U.S. Route 59 in Iowa|US&nbsp;59]] at Calumet
|established=1946
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=390
|dab=1946–1980
|length_mi=0.74
|terminus_a=[[Iowa Highway 10|Iowa&nbsp;10]] near [[Marathon, Iowa|Marathon]]
|terminus_b=Marathon
|established=1946
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=393
|length_mi=2.40
|terminus_a=[[Ionia, Iowa|Ionia]]
|terminus_b=[[U.S. Route 18 in Iowa|US&nbsp;18]] near Ionia
|established=1948
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=394
|dab=1948–1980
|length_mi=1.72
|terminus_a=[[Iowa Highway 2|Iowa&nbsp;2]] near [[Denmark, Iowa|Denmark]]
|terminus_b=[[Iowa Army Ammunition Plant]] southern entrance
|established=1948
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=395
|length_mi=0.53
|terminus_a=[[Melbourne, Iowa|Melbourne]]
|terminus_b=[[Iowa Highway 330|Iowa&nbsp;330]] near Melbourne
|established=1948
|decommissioned=1983
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=396
|length_mi=0.52
|terminus_a=[[Iowa Highway 175|Iowa&nbsp;175]] near [[Farnhamville, Iowa|Farnhamville]]
|terminus_b=Farnhamville
|established=1954
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=398
|length_mi=1.24
|terminus_a=[[Brooklyn, Iowa|Brooklyn]]
|terminus_b=[[U.S. Route 6 in Iowa|US&nbsp;6]] near Brooklyn
|established=1956
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=400
|length_mi=4.54
|terminus_a=[[Truro, Iowa|Truro]]
|terminus_b=[[Interstate 35 in Iowa|I-35]] near Truro
|established=1958
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=403
|dab=1958–1980
|length_mi=0.70
|terminus_a=[[Cushing, Iowa|Cushing]]
|terminus_b=[[U.S. Route 20 in Iowa|US&nbsp;20]] near Cushing
|established=1958
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=405
|length_mi=0.24
|terminus_a=[[Lone Tree, Iowa|Lone Tree]]
|terminus_b=Lone Tree city limits
|established=1958
|decommissioned=2003
|notes=Turned over within city limits
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=408
|length_mi=7.40
|terminus_a=[[U.S. Route 169 in Iowa|US&nbsp;169]] near [[Lu Verne, Iowa|Lu Verne]]
|terminus_b=Lu Verne
|established=1957
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=412
|length_mi=4.72
|terminus_a=[[U.S. Route 63 in Iowa|US&nbsp;63]] in [[Waterloo, Iowa|Waterloo]]
|terminus_b=[[U.S. Route 218|US&nbsp;218]] in [[Waterloo, Iowa|Waterloo]]
|established=1960
|decommissioned=1983
|notes=San Marnan Drive in Waterloo
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=413
|length_mi=3.95
|terminus_a=[[U.S. Route 20 in Iowa|US&nbsp;20]] in [[Fort Dodge, Iowa|Fort Dodge]]
|terminus_b=[[Fort Dodge Municipal Airport]]
|established=1960
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=424
|dab=1961–1980
|length_mi=0.44
|terminus_a=[[Britt, Iowa|Britt]] city limits
|terminus_b=[[U.S. Route 18 in Iowa|US&nbsp;18]] near Britt
|established=1961
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=426
|length_mi=0.52
|terminus_a=[[Iowa Highway 92|Iowa&nbsp;92]] near [[Rose Hill, Iowa|Rose Hill]]
|terminus_b=Rose Hill
|established=1960
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=428
|dab=1965–1980
|length_mi=1.21
|terminus_a=[[Anamosa, Iowa|Anamosa]]
|terminus_b=[[U.S. Route 151|US&nbsp;151]]&nbsp;/ [[Iowa Highway 64|Iowa&nbsp;64]] at Anamosa
|established=1965
|decommissioned=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=924
|dab=1980–1982
|length_mi=4.00
|terminus_a=Webster–Greene County Line
|terminus_b=[[Iowa Highway 175|Iowa&nbsp;175]] near [[Farnhamville, Iowa|Farnhamville]]
|established=1980
|decommissioned=1982
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=933
|dab=1976–1984
|length_mi=0.74
|terminus_a=[[Iowa Highway 141|Iowa&nbsp;141]] in [[Perry, Iowa|Perry]]
|terminus_b=Iowa&nbsp;141 in Perry
|established=1976
|decommissioned=1984
|notes=Former section of Iowa&nbsp;141
}}
{{routelist row
|state=IA
|type=IA 1961
|route=934
|dab=1976–1980
|length_mi=1.07
|terminus_a=[[U.S. Route 61 in Iowa|US&nbsp;61]] near [[Burlington, Iowa|Burlington]]
|terminus_b=US&nbsp;61 near Burlington
|established=1976
|decommissioned=1980
|notes=Former section of US&nbsp;61; now Memorial Park Road
}}
{{routelist row
|state=IA
|type=IA 1961
|route=935
|dab=1976–1981
|length_mi=0.77
|terminus_a=
|terminus_b=
|established=1976
|decommissioned=1981
|notes=Former section of US&nbsp;34 parallel to Business US&nbsp;34 in Burlington
}}
{{routelist row
|state=IA
|type=IA 1961
|route=938
|dab=1976–1980
|length_mi=1.57
|terminus_a=[[Iowa Highway 947|Iowa&nbsp;947]] near [[Manchester, Iowa|Manchester]]
|terminus_b=Manchester Fish Hatchery
|established=1976
|decommissioned=1980
|notes=Former Iowa 116
}}
{{routelist row
|state=IA
|type=IA 1961
|route=939
|dab=1972–1980
|length_mi=6.76
|terminus_a=[[U.S. Route 65 in Iowa|US&nbsp;65]]
|terminus_b=[[Iowa Highway 2|Iowa&nbsp;2]] near [[Corydon, Iowa|Corydon]]
|established=1976
|decommissioned=1980
|notes=Former section of Iowa&nbsp;2
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=940
|dab=1976–1980
|length_mi=2.51
|terminus_a=
|terminus_b=
|established=1976
|decommissioned=1980
|notes=Former sections of Iowa 2
}}
{{routelist row
|state=IA
|type=IA 1961
|route=941
|dab=1976–1980
|length_mi=2.99
|terminus_a=County Road J18 in [[Moravia, Iowa|Moravia]]
|terminus_b=[[Iowa Highway 5|Iowa&nbsp;5]] near Moravia
|established=1976
|decommissioned=1980
|notes=Former section of Iowa&nbsp;5
}}
{{routelist row
|state=IA
|type=IA 1961
|route=942
|dab=1976–1980
|length_mi=5.70
|terminus_a=[[Iowa Highway 5|Iowa&nbsp;5]] near Moravia
|terminus_b=County Road J18 in [[Moravia, Iowa|Moravia]]
|established=1976
|decommissioned=1980
|notes=Former sections of Iowa 5
}}
{{routelist row
|state=IA
|type=IA 1961
|route=943
|dab=1974–1980
|length_mi=0.69
|terminus_a=
|terminus_b=
|established=1974
|decommissioned=1980
|notes=Former section of Iowa&nbsp;13 in Central City
}}
{{routelist row
|state=IA
|type=IA 1961
|route=944
|dab=1971–1980
|length_mi=0.99
|terminus_a=[[Iowa Highway 13|Iowa&nbsp;13]] in [[Manchester, Iowa|Manchester]]
|terminus_b=Iowa&nbsp;13 in Manchester
|established=1976
|decommissioned=1980
|notes=Former section of Iowa&nbsp;13
}}
{{routelist row
|state=IA
|type=IA 1961
|route=946
|dab=1976–1980
|length_mi=2.72
|terminus_a=[[Luana, Iowa|Luana]] city limits
|terminus_b=[[U.S. Route 18 in Iowa|US&nbsp;18]]&nbsp;/ [[U.S. Route 52 in Iowa|US&nbsp;52]] in [[Monona, Iowa|Monona]]
|established=1976
|decommissioned=1980
|notes=Former section of US&nbsp;18&nbsp;/ US&nbsp;52 concurrency; two sections
}}
{{routelist row
|state=IA
|type=IA 1961
|route=947
|dab=1976–1981
|length_mi=23.75
|terminus_a=[[#IA0187|Iowa&nbsp;187]]
|terminus_b=[[Dyersville, Iowa|Dyersville]] city limits
|established=1976
|decommissioned=1981
|notes=Former section of US&nbsp;20
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=951
|dab=1976–1980
|length_mi=2.65
|terminus_a=[[U.S. Route 34 in Iowa|US&nbsp;34]] west of [[Osceola, Iowa|Osceola]]
|terminus_b=US&nbsp;34 near Osceola
|established=1976
|decommissioned=1980
|notes=Former section of US&nbsp;34
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=952
|dab=1978–1982
|length_mi=0.18
|terminus_a=
|terminus_b=
|established=1978
|decommissioned=1982
|notes=Former section of US&nbsp;67 north of Clinton
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=953
|dab=1980
|length_mi=0.89
|terminus_a=[[Iowa Highway 38|Iowa&nbsp;38]] near [[Muscatine, Iowa|Muscatine]]
|terminus_b=Iowa&nbsp;38 in Muscatine
|established=1976
|decommissioned=1980
|notes=Former section of Iowa&nbsp;38
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=959
|dab=1970–1981
|length_mi=1.27
|terminus_a=[[U.S. Route 65 in Iowa|US&nbsp;65]]&nbsp;/ [[U.S. Route 69 in Iowa|US&nbsp;69]] in [[Des Moines, Iowa|Des Moines]]
|terminus_b=Des Moines city limits
|established=1970
|decommissioned=1981
|notes=Former section of US&nbsp;65&nbsp;/ US&nbsp;69 concurrency
}}
{{routelist row
|state=IA
|type=IA 1961
|route=960
|dab=1973–1982
|length_mi=1.58
|terminus_a=[[Clarinda, Iowa|Clarinda]] city limits
|terminus_b=[[Iowa Highway 2|Iowa&nbsp;2]] near Clarinda
|established=1973
|decommissioned=1982
|notes=Former section of Iowa&nbsp;2
}}
{{routelist row
|state=IA
|type=IA 1961
|route=961
|dab=1976–1980
|length_mi=0.56
|terminus_a=[[Villisca, Iowa|Villisca]] city limits
|terminus_b=[[U.S. Route 71 in Iowa|US&nbsp;71]] near Villisca
|established=1976
|decommissioned=1980
|notes=Former section of US&nbsp;71
}}
{{routelist row
|state=IA
|type=IA 1961
|route=965
|dab=1976–1980
|length_mi=3.29
|terminus_a=
|terminus_b=
|established=1976
|decommissioned=1980
|notes=Former section of US&nbsp;52
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=969
|dab=1976–1980
|length_mi=0.52
|terminus_a=[[U.S. Route 169 in Iowa|US&nbsp;169]] near Burt
|terminus_b=[[Burt, Iowa|Burt]]
|established=1976
|decommissioned=1980
|notes=former Iowa 422
}}
{{routelist row
|state=IA
|type=IA 1961
|route=971
|dab=1975–1979
|length_mi=10.78
|terminus_a=[[Iowa Highway 2|Iowa&nbsp;2]] 
|terminus_b=[[U.S. Route 59 in Iowa|US&nbsp;59]] in [[Shenandoah, Iowa|Shenandoah]]
|established=1975
|decommissioned=1979
|notes=Former section of Iowa&nbsp;2
}}
{{routelist row
|state=IA
|type=IA 1961
|route=972
|dab=1974–1980
|length_mi=10.17
|terminus_a=[[Iowa Highway 92|Iowa&nbsp;92]]&nbsp;/ [[U.S. Route 169 in Iowa|US&nbsp;169]] in [[Winterset, Iowa|Winterset]]
|terminus_b=[[U.S. Route 169 in Iowa|US&nbsp;169]]
|established=1974
|decommissioned=1980
|notes=Former section of US&nbsp;169
}}
{{routelist row
|state=IA
|type=IA 1961
|route=973
|dab=1976–1980
|length_mi=1.49
|terminus_a=[[Iowa Highway 92|Iowa&nbsp;92]] in [[Winterset, Iowa|Winterset]]
|terminus_b=[[#IA 19610972|Iowa&nbsp;972]] in Winterset
|established=1976
|decommissioned=1980
|notes=Former section of Iowa&nbsp;92
}}
{{routelist row
|state=IA
|type=IA 1961
|route=976
|dab=1974–1980
|length_mi=2.00
|terminus_a=[[U.S. Route 218|US&nbsp;218]] 
|terminus_b=[[Mount Pleasant, Iowa|Mount Pleasant]] city limits
|established=1974
|decommissioned=1980
|notes=Former section of US&nbsp;218; formerly Iowa&nbsp;972
}}
{{routelist row
|state=IA
|type=IA 1961
|route=980
|length_mi=0.77
|terminus_a=[[U.S. Route 34 in Iowa|US&nbsp;34]] near Ottumwa
|terminus_b=[[Ottumwa, Iowa|Ottumwa]] city limits
|established=1967
|decommissioned=1980
|notes=Former section of US&nbsp;34; formerly US&nbsp;34 Alternate
}}
{{routelist row
|state=IA
|type=IA 1961
|route=981
|dab=1967–1980
|length_mi=0.44
|terminus_a=[[Iowa Highway 150|Iowa&nbsp;150]] near Fayette
|terminus_b=[[Fayette, Iowa|Fayette]] city limits
|established=1967
|decommissioned=1980
|notes=Former section of Iowa&nbsp;150; formerly Iowa&nbsp;991
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=983
|dab=1967–1980
|length_mi=0.81
|terminus_a=[[U.S. Route 34 in Iowa|US&nbsp;34]] west of [[Chariton, Iowa|Chariton]]
|terminus_b=[[U.S. Route 34 in Iowa|US&nbsp;34]] east of Chariton
|established=1967
|decommissioned=1980
|notes=Former section of US&nbsp;34; formerly Iowa&nbsp;995 and Iowa&nbsp;996
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=984
|length_mi=2.24
|terminus_a=[[Bettendorf, Iowa|Bettendorf]] city limits
|terminus_b=[[U.S. Route 67 in Iowa|US&nbsp;67]] in [[Le Claire, Iowa|Le Claire]]
|established=1968
|decommissioned=1982
|notes=Former section of Iowa&nbsp;417
}}
{{Routelist row
|state=IA
|type=IA 1961
|route=999
|length_mi=2.22
|terminus_a=Spruce Street in [[College Springs, Iowa|College Springs]]
|terminus_b=[[#IA_19610333|Iowa&nbsp;333]] near College Springs
|established=1961
|decommissioned=1980
|notes=Former section of Iowa&nbsp;333
}}
{{routelist bottom|keys=former}}

==Routes added==
{{Routelist top|length_ref=<ref name=DOT1980>{{IowaDOT|year=1980|2020-08-19}}</ref>}}
{{Routelist row
|state=IA
|type=IA 1980
|route=79
|length_mi=5.64
|terminus_a=[[Geode State Park]]
|terminus_b=[[U.S. Route 34 in Iowa|US&nbsp;34]] in [[Middletown, Iowa|Middletown]]
|established=1980
|decommissioned=2003
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=91
|length_mi=4.64
|terminus_a=[[Iowa Highway 9|Iowa&nbsp;9]] in [[Lyon County, Iowa|Lyon County]]
|terminus_b=[[Minnesota State Highway 91|MN&nbsp;91]] at the Minnesota state line
|established=1980
|decommissioned=2003
|notes=none
}}
{{routelist row
|state=IA
|type=IA 1980
|route=100
|length_mi=2.74
|length_ref=<ref name=DOT1984/>
|terminus_a=[[Interstate 380 (Iowa)|I-380]]  in [[Cedar Rapids, Iowa|Cedar Rapids]]
|terminus_b=[[U.S. Route 151|US&nbsp;151]] in Cedar Rapids
|established=1984
|notes=none
}}
{{routelist row
|state=IA
|type=IA 1980
|route=102
|length_mi=15.96
|terminus_a=[[Iowa Highway 163|Iowa&nbsp;163]] in [[Pella, Iowa|Pella]]
|terminus_b=[[U.S. Route 63 in Iowa|US&nbsp;63]]&nbsp;/ [[#IA0146|Iowa&nbsp;146]] in New Sharon
|established=1980
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=115
|length_mi=1.24
|terminus_a=[[U.S. Route 34 in Iowa|US&nbsp;34]] near [[Stanton, Iowa|Stanton]]
|terminus_b=[[Viking Lake State Park]]
|established=1980
|decommissioned=2003
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=134
|length_mi=1.75
|terminus_a=Beed's Lake State Park
|terminus_b=[[Iowa Highway 3|Iowa&nbsp;3]] near [[Hampton, Iowa|Hampton]]
|established=1980
|decommissioned=1987
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=142
|length_mi=20.96
|terminus_a=[[Iowa Highway 2|Iowa&nbsp;2]] in [[Plano, Iowa|Plano]]
|terminus_b=[[Iowa Highway 5|Iowa&nbsp;5]] near [[Moravia, Iowa|Moravia]]
|established=1980
|decommissioned=2003
|notes=none
}}
{{routelist row
|state=IA
|type=IA 1980
|route=152
|length_mi=1.34
|terminus_a=[[Interstate 35 in Iowa|I-35]] near [[Osceola, Iowa|Osceola]]
|terminus_b=[[U.S. Route 69 in Iowa|US&nbsp;69]] at Osceola
|established=1980
|decommissioned=2014
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=186
|length_mi=3.38
|terminus_a=Green Valley State Park
|terminus_b=[[Iowa Highway 25|Iowa&nbsp;25]] in [[Creston, Iowa|Creston]]
|established=1980
|decommissioned=2001
|notes=none
}}
{{routelist row
|state=IA
|type=IA 1980
|route=192
|length_mi=4.74
|terminus_a=[[Interstate 29 in Iowa|I-29]]&nbsp;/ [[Interstate 80 in Iowa|I-80]] at [[Council Bluffs, Iowa|Council Bluffs]]
|terminus_b=[[Interstate 29 in Iowa|I-29]] at [[Council Bluffs, Iowa|Council Bluffs]]
|established=1931
|decommissioned=2017
|notes=Was decommissioned in 1975, but restored in 1980
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=243
|length_mi=0.56
|terminus_a=[[Black Hawk Lake State Park]]
|terminus_b=[[U.S. Route 71 in Iowa|US&nbsp;71]]&nbsp;/ [[Iowa Highway 175|Iowa&nbsp;175]] near [[Wall Lake, Iowa|Wall Lake]]
|established=1980
|decommissioned=2003
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=244
|length_mi=0.68
|terminus_a=[[Interstate 80 in Iowa|I-80]] near [[Neola, Iowa|Neola]]
|terminus_b=[[Iowa Highway 191|Iowa&nbsp;191]] in Neola
|established=1980
|decommissioned=2003
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=362
|length_mi=5.09
|terminus_a=Wilson State Park
|terminus_b=[[Interstate 29 in Iowa|I-29]] at [[Loveland, Iowa|Loveland]]
|established=1980
|decommissioned=2003
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=394
|length_mi=10.67
|terminus_a=Route B at [[St. Francisville, Missouri|St. Francisville, Mo.]]
|terminus_b=[[U.S. Route 218|US&nbsp;218]] near [[Donnellson, Iowa|Donnellson]]
|established=1980
|decommissioned=2005
|notes=Replaced by Iowa&nbsp;27
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=403
|length_mi=0.47
|terminus_a=[[South Dakota Highway 48|SD&nbsp;48]] near [[Akron, Iowa|Akron]]
|terminus_b=[[Iowa Highway 12|Iowa&nbsp;12]] in Akron
|established=1980
|decommissioned=2003
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=428
|length_mi=5.75
|terminus_a=[[Maquoketa Caves State Park]]
|terminus_b=[[U.S. Route 61 in Iowa|US&nbsp;61]] near [[Maquoketa, Iowa|Maquoketa]]
|established=1980
|decommissioned=2003
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=918
|length_mi=1.12
|length_ref=<ref name=DOT1984/>
|terminus_a=[[Iowa Highway 16|Iowa&nbsp;16]] near [[Eldon, Iowa|Eldon]]
|terminus_b=Iowa&nbsp;16 in Eldon
|established=1984
|decommissioned=2003
|notes=Former section of Iowa&nbsp;16
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=919
|length_mi=0.29
|length_ref=<ref name=DOT1984/>
|terminus_a=[[Iowa Highway 363|Iowa&nbsp;363]] in [[Urbana, Iowa|Urbana]]
|terminus_b=Walnut Street in Urbana
|established=1984
|decommissioned=1995
|notes=Former section of Iowa&nbsp;363
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=920
|length_mi=12.61
|length_ref=<ref name=DOT1984/>
|terminus_a=[[Center Point, Iowa|Center Point]]
|terminus_b=[[Iowa Highway 150|Iowa&nbsp;150]] near [[Urbana, Iowa|Urbana]]
|established=1984
|decommissioned=2003
|notes=Former section of Iowa&nbsp;150
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=921
|dab=1984–1985
|length_mi=12.47
|length_ref=<ref name=DOT1984/>
|terminus_a=[[#IA_19800920|Iowa&nbsp;920]] in [[Center Point, Iowa|Center Point]]
|terminus_b=[[Hiawatha, Iowa|Hiawatha]]
|established=1984
|decommissioned=1985
|notes=Former section of Iowa&nbsp;150
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=922
|dab=1984–1986
|length_mi=1.27
|length_ref=<ref name=DOT1984/>
|terminus_a=[[U.S. Route 61 in Iowa|US&nbsp;61]] in [[Muscatine, Iowa|Muscatine]]
|terminus_b=[[Iowa Highway 22|Iowa&nbsp;22]] in Muscatine
|established=1984
|decommissioned=1986
|notes=Former section of US&nbsp;61; became part of an extended Iowa&nbsp;38
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=923
|length_mi=4.52
|length_ref=<ref name=DOT1982>{{IowaDOT|year=1982|2020-08-19}}</ref>
|terminus_a=
|terminus_b=
|established=1982
|decommissioned=2003
|notes=Former section of US&nbsp;218; had three sections
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=925
|length_mi=24.32
|terminus_a=[[Interstate 80 in Iowa|I-80]]&nbsp;/ [[U.S. Route 6 in Iowa|US&nbsp;6]] in [[Adair, Iowa|Adair]]
|terminus_b=[[U.S. Route 6 in Iowa|US&nbsp;6]] near [[Dexter, Iowa|Dexter]]
|established=1980
|decommissioned=2003
|notes=Former section of US&nbsp;6
}}
{{routelist row
|state=IA
|type=IA 1980
|route=926
|dab=1980–1988
|length_mi=6.63
|terminus_a=[[U.S. Route 6 in Iowa|US&nbsp;6]] in [[Altoona, Iowa|Altoona]]
|terminus_b=[[U.S. Route 6 in Iowa|US&nbsp;6]]&nbsp;/ [[Iowa Highway 14|Iowa&nbsp;14]] in [[Newton, Iowa|Newton]]
|established=1980
|decommissioned=1988
|notes=Former section of US&nbsp;6
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=927
|length_mi=19.02
|terminus_a=[[U.S. Route 6 in Iowa|US&nbsp;6]]&nbsp;/ [[Iowa Highway 38|Iowa&nbsp;38]] in [[Wilton, Iowa|Wilton]]
|terminus_b=[[Interstate 280 (Iowa–Illinois)|I-280]]&nbsp;/ [[U.S. Route 6 in Iowa|US&nbsp;6]] near [[Davenport, Iowa|Davenport]]
|established=1980
|decommissioned=2003
|notes=Former section of US&nbsp;6
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=928
|length_mi=17.15
|terminus_a=[[Iowa Highway 17|Iowa&nbsp;17]] near [[Webster City, Iowa|Webster City]]
|terminus_b=CR D20 near [[Williams, Iowa|Williams]]
|established=1980
|decommissioned=2003
|notes=Former section of US&nbsp;20
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=929
|length_mi=0.79
|terminus_a=[[Murray, Iowa|Murray]] city limits
|terminus_b=Maple Street in Murray
|established=1980
|decommissioned=2003
|notes=Former section of Iowa&nbsp;152
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=931
|length_mi=8.47
|terminus_a=[[Interstate 35 in Iowa|I-35]] in [[Ankeny, Iowa|Ankeny]]
|terminus_b=[[U.S. Route 65 in Iowa|US&nbsp;65]] in [[Polk County, Iowa|Polk County]]
|established=1980
|decommissioned=2003
|notes=none
}}
{{routelist row
|state=IA
|type=IA 1980
|route=935
|length_mi=1.38
|length_ref=<ref name=DOT1982/>
|terminus_a=[[Interstate 29 in Iowa|I-29]]
|terminus_b=Mills–Pottawattamie county line
|established=1982
|decommissioned=2003
|notes=Former section of Iowa&nbsp;370
}}
{{routelist row
|state=IA
|type=IA 1980
|route=938
|length_mi=0.46
|terminus_a=[[Unionville, Iowa|Unionville]]
|terminus_b=Unionville city limits
|established=1980
|decommissioned=2003
|notes=Former section of Iowa&nbsp;369
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=939
|length_mi=12.37
|terminus_a=[[Independence, Iowa|Independence]]
|terminus_b=[[Iowa Highway 187|Iowa&nbsp;187]] near [[Masonville, Iowa|Masonville]]
|established=1980
|decommissioned=2003
|notes=Former section of US&nbsp;20
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=942
|length_mi=0.47
|terminus_a=[[Woodburn, Iowa|Woodburn]]
|terminus_b=Woodburn city limits
|established=1980
|decommissioned=2003
|notes=Former section of Iowa&nbsp;104
}}
{{routelist row
|state=IA
|type=IA 1980
|route=943
|dab=1980–1987
|length_mi=0.43	
|terminus_a=[[Galva, Iowa|Galva]]
|terminus_b=Galva city limits
|established=1980
|decommissioned=1987
|notes=Former section of Iowa&nbsp;328
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=944
|length_mi=0.56
|terminus_a=[[U.S. Route 61 in Iowa|US&nbsp;61]]&nbsp;/ [[Iowa Highway 2|Iowa&nbsp;2]] in [[Fort Madison, Iowa|Fort Madison]]
|terminus_b=Fort Madison city limits
|established=1980
|decommissioned=2003
|notes=Former section of Iowa&nbsp;88
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=945
|length_mi=4.61
|terminus_a=[[Interstate 80 in Iowa|I-80]] near [[Altoona, Iowa|Altoona]]
|terminus_b=[[#IA_19800931|Iowa&nbsp;931]] in [[Polk County, Iowa|Polk County]]
|established=1980
|decommissioned=2003
|notes=none
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=950
|length_mi=3.35
|terminus_a=[[U.S. Route 6 in Iowa|US&nbsp;6]]&nbsp;/ [[U.S. Route 65|US&nbsp;65]] in [[Altoona, Iowa|Altoona]]
|terminus_b=[[Iowa Highway 163|Iowa&nbsp;163]] in [[Pleasant Hill, Iowa|Pleasant Hill]]
|established=1980
|decommissioned=1994
|notes=Now 34th Avenue/56th Street
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=951
|length_mi=3.15
|length_ref=<ref name=DOT1984>{{IowaDOT|year=1984|2020-08-19}}</ref>
|terminus_a=[[Carbon, Iowa|Carbon]] city limits
|terminus_b=[[Iowa Highway 148|Iowa&nbsp;148]]
|established=1983
|decommissioned=1993
|notes=Former section of Iowa&nbsp;95
}}
{{routelist row
|state=IA
|type=IA 1980
|route=960
|dab=1982–1986
|length_mi=1.11
|length_ref=<ref name=DOT1982/>
|terminus_a=
|terminus_b=
|established=1982
|decommissioned=1986
|notes=Former section of US&nbsp;61
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=985
|length_mi=1.95
|terminus_a=[[U.S. Route 52 in Iowa|US&nbsp;52]] near [[Bellevue State Park (Iowa)|Bellevue State Park]]
|terminus_b=US&nbsp;52 near [[Bellevue, Iowa|Bellevue]]
|established=1980
|decommissioned=2003
|notes=none
}}
{{routelist bottom|keys=former}}

==Existing route changes==
{|class="wikitable sortable plainrowheaders"
!scope="col" rowspan=2 | Number
!colspan=2 class=unsortable|Change in length
!scope="col" class="unsortable" rowspan=2 | Southern&nbsp;or western&nbsp;terminus
!scope="col" class="unsortable" rowspan=2 | Northern&nbsp;or eastern&nbsp;terminus
!scope="col" data-sort-type="date" rowspan=2 | Formed
!scope="col" data-sort-type="date" rowspan=2 | Removed
!scope="col" class="unsortable" rowspan=2 | Notes
|-
!scope="col" data-sort-type="number" | mi{{efn|Calculated by subtracting the 1978 mileage from the 1980 mileage<ref name="DOT1978" /><ref name="DOT1980" />}}
!scope="col" data-sort-type="number" | km
|-
{{routelist row
|state=IA
|type=IA 1980
|route=21
|length_mi=12.42
|terminus_a=[[Iowa Highway 149|Iowa&nbsp;149]] near [[Hedrick, Iowa|Hedrick]]
|terminus_b=[[Iowa Highway 92|Iowa&nbsp;92]] near [[Delta, Iowa|Delta]]
|established=1934
|notes=Extended south from Iowa&nbsp;92
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=25
|length_mi=-6.99
|terminus_a=[[Blockton, Iowa|Blockton]]
|terminus_b=[[Iowa Highway 2|Iowa&nbsp;2]] near [[Benton, Iowa|Benton]]
|established=1926
|notes=Continued south to Blockton
}}
{{routelist row
|state=IA
|type=IA 1980
|route=28
|length_mi=6.18
|terminus_a=[[Iowa Highway 5|Iowa&nbsp;5]] in [[Des Moines, Iowa|Des Moines]]
|terminus_b=[[U.S. Route 6 in Iowa|US&nbsp;6]] in Des Moines
|established=1926
|notes=Extended north from Iowa&nbsp;5
}}
{{routelist row
|state=IA
|type=IA 1980
|route=72
|length_mi=3.16
|terminus_a=[[Dows, Iowa|Dows]]
|terminus_b=[[Interstate 35 in Iowa|I-35]] east of Dows
|established=1920
|decommissioned=1986
|notes=Extended east from Dows
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=139
|length_mi=-12.25
|terminus_a=[[Protivin, Iowa|Protivin]]
|terminus_b=[[Iowa Highway 9|Iowa&nbsp;9]] at [[Cresco, Iowa|Cresco]]
|established=1930
|notes=Spur route to Protivin removed
}}
{{routelist row
|state=IA
|type=IA 1980
|route=140
|length_mi=15.55
|terminus_a=[[Kingsley, Iowa|Kingsley]]
|terminus_b=[[Iowa Highway 3|Iowa&nbsp;3]] at [[Remsen, Iowa|Remsen]]
|established=1926
|notes=Extended north from Kingsley
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=145
|length_mi=3.13
|terminus_a=[[Interstate 29 in Iowa|I-29]] near [[Thurman, Iowa|Thurman]]
|terminus_b=Thurman
|established=1931
|decommissioned=2003
|notes=Extended west from Thurman
}}
{{routelist row
|state=IA
|type=IA 1980
|route=150
|length_mi=-11.05
|length_ref={{efn|Calculated by subtracting the 1980 mileage from the 1984 mileage<ref name="DOT1980" /><ref name="DOT1984" />}}
|terminus_a=[[U.S. Route 151|US&nbsp;151]] in [[Cedar Rapids, Iowa|Cedar Rapids]]<hr>[[U.S. Route 218|US&nbsp;218]] at [[Vinton, Iowa|Vinton]]
|terminus_b=[[#IA_19610101|Iowa&nbsp;101]] in [[Benton County, Iowa|Benton County]]<hr>[[#IA_19800920|Iowa&nbsp;920]] in Benton County
|established=1941
|notes=Rerouted over Iowa&nbsp;101 in 1984
}}
{{routelist row
|state=IA
|type=IA 1980
|route=160
|length_mi=1.24
|terminus_a=[[U.S. Route 69 in Iowa|US&nbsp;69]] at [[Ankeny, Iowa|Ankeny]]
|terminus_b=[[Interstate 35 in Iowa|I-35]] at Ankeny
|established=1947
|notes=Extended east within Ankeny
}}
{{routelist row
|state=IA
|type=IA 1980
|route=173
|length_mi=11.53
|terminus_a=[[Iowa Highway 83|Iowa&nbsp;83]] near [[Atlantic, Iowa|Atlantic]]
|terminus_b=[[Elk Horn, Iowa|Elk Horn]]
|established=1930
|notes=Extended south from Elk Horn
}}
{{routelist row
|state=IA
|type=IA 1980
|route=210
|length_mi=19.58
|terminus_a=[[Iowa Highway 141|Iowa&nbsp;141]] near [[Woodward, Iowa|Woodward]]
|terminus_b=[[Slater, Iowa|Slater]]
|established=1931
|notes=Rerouted over Iowa&nbsp;89
}}
{{routelist row
|state=IA
|type=IA 1980
|route=212
|length_mi=-10.02
|terminus_a=[[#IA0021|Iowa&nbsp;21]] near [[Belle Plaine, Iowa|Belle Plaine]]
|terminus_b=[[U.S. Route 30 in Iowa|US&nbsp;30]] near [[Chelsea, Iowa|Chelsea]]
|established=1934
|notes=Continued northwest to US&nbsp;30 until 1980
}}
{{routelist row
|state=IA
|type=IA 1980
|route=220
|length_mi=-2.20
|length_ref={{efn|Calculated by subtracting the 1980 mileage from the 1982 mileage<ref name="DOT1980" /><ref name="DOT1982" />}}
|terminus_a=[[Upper South Amana, Iowa|Upper South Amana]]<hr>[[Iowa Highway 149|Iowa&nbsp;149]] at [[Amana, Iowa|Amana]]
|terminus_b=[[U.S. Route 6 in Iowa|US&nbsp;6]]&nbsp;/ [[Iowa Highway 149|Iowa&nbsp;149]] at [[South Amana, Iowa|South Amana]]<hr>[[East Amana, Iowa|East Amana]]
|established=1931
|notes=Continued east to East Amana and south to Upper South Amana until 1980
}}
{{Routelist row
|state=IA
|type=IA 1980
|route=223
|length_mi=6.94
|terminus_a=[[Iowa Highway 330|Iowa&nbsp;330]] near [[Baxter, Iowa|Baxter]]
|terminus_b=Baxter
|established=1931
|decommissioned=1997
|notes=Extended west from Baxter
}}
{{routelist row
|state=IA
|type=IA 1980
|route=224
|length_mi=9.37
|terminus_a=[[Kellogg, Iowa|Kellogg]]
|terminus_b=[[Iowa Highway 14|Iowa&nbsp;14]] near [[Laurel, Iowa|Laurel]]
|established=1931
|notes=Extended north from Kellogg in 1980
}}
{{routelist row
|state=IA
|type=IA 1980
|route=281
|length_mi=17.29
|terminus_a=[[Dunkerton, Iowa|Dunkerton]]
|terminus_b=[[Iowa Highway 150|Iowa&nbsp;150]] at [[Oelwein, Iowa|Oelwein]]
|established=1935
|notes=Rerouted over Iowa&nbsp;190
}}
{{routelist row
|state=IA
|type=IA 1980
|route=333
|length_mi=-3.77
|terminus_a=[[Fremont County, Iowa|Fremont]]–[[Page County, Iowa|Page]] county line near [[Northboro, Iowa|Northboro]]<hr>[[Interstate 29 in Iowa|I-29]] at [[Hamburg, Iowa|Hamburg]]
|terminus_b=[[U.S. Route 71 in Iowa|US&nbsp;71]] near [[Braddyville, Iowa|Braddyville]]<hr>[[U.S. Route 59 in Iowa|US&nbsp;59]] near Northboro
|established=1935
|notes=Route swap
}}
{{routelist bottom|keys=former}}

==Notes==
{{notelist}}

==References==
{{reflist}}

==External links==
{{Attached KML}}

[[Category:Former state highways in Iowa| ]]
[[Category:Transportation in Iowa]]
[[Category:Lists of roads in Iowa|Highways]]