Biet may refer to:
- Félix Biet, (1838–1901) French missionary
- Michel Biet, (1883–1948) Dutch gymnast
- Biet (mountain), a mountain in the canton of Schwyz in Switzerland
The Biet (1,965 m) is a mountain of the Schwyzer Alps, located east of Oberiberg in the canton of Schwyz. It lies on the range north of the Druesberg.