Chi Tau is a defunct regional fraternity, formed at Duke University in 1920 and existing until 1929.
Chi Tau may also refer to:
- Chi Tau (local), a local fraternity organized in 1939 at Chico State University, unaffiliated with the regional fraternity, and notorious for a 2005 hazing death.
- Chi Tauri, the name of a star system in the constellation of Taurus.
- Chitauri, a fictional race of aliens appearing in Marvel Comics.