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.

Central Alaskan Yupʼik is one of the languages of the Yupik family, in turn a member of the Eskimo–Aleut language group, spoken in western and southwestern Alaska. Both in ethnic population and in number of speakers, the Central Alaskan Yupik people form the largest group among Alaska Natives. As of 2010 Yupʼik was, after Navajo, the second most spoken aboriginal language in the United States. Yupʼik should not be confused with the related language Central Siberian Yupik spoken in Chukotka and St. Lawrence Island, nor Naukan Yupik likewise spoken in Chukotka.