Chevak is a city in Kusilvak Census Area, Alaska, United States. At the 2020 census the population was 951, up from 938 in 2010.

Chevak Cupʼik or just Cupʼik is a subdialect of the Hooper Bay–Chevak dialect of Yupʼik spoken in southwestern Alaska in the Chevak by Chevak Cupʼik Eskimos. Speakers of the Chevak subdialect refer to themselves as Cupʼik, while speakers of the Hooper Bay subdialect refer to themselves as Yupʼik, as in the Yukon-Kuskokwim dialect.