Sao
- Boussé Department
- Burmese names
- Chad national football team
- IATA airport code
- Ligi Sao
- List of airline codes (S)
- Ron Sao
- SAO (biscuit)
- Saco Transportation Center
- Sao (moon)
- Sao (mythology)
- Sao Sao Sao
- Sao civilisation
- Sau (disambiguation)
- Security Advisory Opinion
- Serb Autonomous Regions
- Session-At-Once
- Smithsonian Astrophysical Observatory
- Smithsonian Astrophysical Observatory Star Catalog
- Special Astrophysical Observatory of the Russian Academy of Science
- Specified Associated Organisation
- Sword Art Online
- São Paulo
- São Tomé and Príncipe
- Thao language