Cassius

Cassius may refer to:

People

Cassius, an ancient Roman family name, see Cassia gens
- Gaius Cassius Longinus (died 42 BC), Roman senator and a leader of Julius Caesar's assassination
- Avidius Cassius (130–175), usurper Roman Emperor
Cassius, pen-name of Michael Foot, British politician and writer
Cassius of Clermont (died c. 260)
Cassius of Narni (died 558), bishop of Narni
Cassius Chaerea, 1st-century Roman army soldier and officer in the Paetorian Guard and assassin of emperor Caligula
Cassius Marcellus Clay (disambiguation), several people, including:
- Cassius Clay (1942–2016), birth name of American boxer Muhammad Ali
- Cassius Marcellus Clay Sr. (1912–1989), father of the boxer
- Cassius Marcellus Clay (politician) (1810–1903), American abolitionist, nicknamed the "Lion of White Hall"
Cassius Dio (c. AD 155 or 163/164 – after 229), Roman historian
Cassius D. Kalb, an American musician
Cassius Longinus (disambiguation)
Cassius Stanley (born 1999), American basketball player
Cassius Turvey (2007–2022), Aboriginal Australian boy killed in Perth
Cassius Winston (born 1998), American basketball player

Cassius (band), a French electronic music duo
"Cassius" (song), a 2008 song by Foals
"Cassius", a 2017 song by Fleet Foxes on the album Crack-Up
Cassius Chrome, a House Robot in Robot Wars
Cassius Bright, a character in the video game The Legend of Heroes: Trails in the Sky
Cassius Green, a character in the film Sorry to Bother You
Cassius au Bellona, a character in Pierce Brown's Red Rising series of novels