SIU
From Wikipedia, the free encyclopedia
SIU may refer to:
- Seafarers International Union, the dominant trade union for unlicensed merchant sailors in the U.S. fleet.
- Southern Illinois University, a university in southern Illinois
- Special Investigations Unit, a civilian agency responsible for investigating incidents between police and civilians in Ontario, Canada
- Siu, a Chinese surname
- Siuna Airport (IATA Code: SIU) in Siuna, Costa Rica