Chuuk or Truk may refer to:
- Chuuk State, one of the four states of the Federated States of Micronesia
- Chuuk Lagoon, or Chuuk Atoll, a sheltered body of water and island group in the central Pacific
- Chuuk International Airport, an airport located on Weno, in Chuuk State, Micronesia
- Chuukese language, a language of the Austronesian language family
- Chuukese people, an ethnic group in Oceania
- Battle of Truk, a massive United States Navy air and surface attack on Truk Lagoon on 17–18 February 1944