Omu or OMU may refer to:
- Ōmu, Hokkaido, a town in Hokkaido
- Omu Okwei (1872–1943), Nigerian queen merchant
- Paul Omu, military governor of South-Eastern State, Nigeria
- Stella Omu, Nigerian politician who was elected as national Senator on the People's Democratic Party
- Ohmu, a type of creature from Hayao Miyazaki's Nausicaa of the Valley of the Wind
- Osaka Metropolitan University
- Owensboro Municipal Utilities
