Usa (pronounced Oosah) is the name of several rivers in Russia:
- Usa River (Germany), a small stream in Hesse
- Usa River (Kemerovo Oblast), a river in Kemerovo Oblast
- Usa River (Komi Republic), a river in Komi Republic
- Usa River (Samara Oblast), a river in Samara Oblast
- Usa River (Tanzania), a town in the Arusha Region
