- Language: Meskwaki
- Alternate names: Meskwakie, Mesquakie, Sac And Fox, Sauk-Fox
- Language code: sac
- Language family: Algic, Algonquian-Blackfoot, Algonquian, Eastern Great Lakes Algonquian, Fox
- Number of speakers: 200
- Script: Latin script
Fox is an Algonquian language, spoken by a thousand Meskwaki, Sauk, and Kickapoo in various locations in the Midwestern United States and in northern Mexico.