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