WAST may refer to:
- WAST (Ohio), a defunct daytime-only radio station licensed to Ashtabula, Ohio, US
- WAST-LP, a defunct low-power television station in Ashland, Wisconsin, US
- WNYT (TV), formerly WAST, a television station licensed to Albany, New York, US
- Wast Water, a lake in Cumbria, England
- wast, a past-tense form of to be formerly used with the pronoun thou