Wo may refer to:
- Wo (kana), a Japanese kana
- Wolof language ISO 639-1 code
- Wa (Japan), an elder Chinese name for Japan
- Wo, the name of China Unicom's 3g network
- Wo Ding, traditionally believed to be a king of the Shang Dynasty
- Wo Jia, a king of the Shang Dynasty
- Wo Weihan (1949-2008), a Chinese scientist and entrepreneur executed for allegedly spying for Taiwan
- Wo Fat, a fictional nemesis of Steve McGarrett on the television show Hawaii 5-0
- Zhang Wo, a Chinese painter of the Yuan Dynasty
WO also refer to:
- W. O. Bentley, British car designer
WO may be an acronym for:
- Walk over, a term in sports and elections
- Warrant Officer
- WebObjects, a web application platform
- Wine of Origin, a designated area for the production of South African wine
- World Airways IATA code
- Wrestling Observer, a professional wrestling newsletter by Dave Meltzer
- Warhammer Online, a MMORPG
- Write-off, a term often used to describe that a vehicle is damaged beyond economic repair
- Web Operation, a front-end web design department of VNG corp.