Cuy may refer to:
- the animal and the meat of a guinea pig in the Andean regions of South America, a traditional food of Peruvian, Colombian, and Ecuadorian Andean people.
- The IATA airport code for Cue Airport in Western Australia
Cuy is the name or part of the name of several communes in France:
- Cuy, Oise, in the Oise département
- Cuy, Yonne, in the Yonne département
- Cuy-Saint-Fiacre, in the Seine-Maritime département