SIU
SIU is an abbreviation for:
- The Seafarers International Union of North America
- Schiller International University
- The Southern Illinois University
- Shake It Up - Dancing is everything a Disney series
Siu is the name of:
- Siu Ching Man ( born 1978 ), badminton player from Hong Kong
- Yum - Tong Siu ( born 1943 ), Chinese mathematician
- Disambiguation
- Abbreviation