Bou or BOU may refer to:
- Bou, Loiret, a town and commune in northern-central France
- Bou (name)
- Bank of Uganda
- Basis of Union (disambiguation), various organizations
- British Ornithologists' Union
- Boulder Geomagnetic Observatory
- Bou (film), a 1998 Indian Odia-language drama film
- Bou, a series of interconnected Indian Bengali-language films including