Cathey is a surname of Scottish origin. It is a reduced form of the surname MacCathay which is Galloway surname of uncertain origin.
- James L. Cathey, Jr. (1919-1996), American politician.
- Morgan Cathey (born 1984), American soccer player.
- Reg E. Cathey, (born 1958), American film and television actor.
- Cathey Palyo (born 1958), American professional female bodybuilder.