Sao

SAO or Sao may refer to:

Places

 * Sao civilisation, in Middle Africa from 6th century BC to 16th century AD
 * Sao, a town in Boussé Department, Burkina Faso
 * Saco Transportation Center (station code SAO), a train station in Saco, Maine, U.S.
 * SAO, the ICAO airline designator for Sahel Aviation Service, Mali
 * SAO, the IATA airport code for airports in the São Paulo metropolitan area, Brazil
 * Serb Autonomous Regions during the breakup of Yugoslavia
 * São Paulo, the largest city in Brazil

Science

 * Smithsonian Astrophysical Observatory of the Smithsonian Institution in Cambridge, Massachusetts, U.S.
 * Smithsonian Astrophysical Observatory Star Catalog, which assigns SAO catalogue entries
 * Special Astrophysical Observatory of the Russian Academy of Science (SAO RAS)

Entertainment

 * Sword Art Online, a Japanese light novel series
 * Sword Art Online (2012 TV series), an anime adaptation of the light novels
 * The titular game within the series.
 * Sao Sao Sao, a Thai pop music trio

Other uses

 * Sao (mythology), a nereid (sea nymph) in Greek mythology
 * Sáo, a Vietnamese flute
 * Sao (moon), a satellite of Neptune
 * Sao, or Thao language, of the Thao people in central Taiwan
 * São, the Portuguese word for saint
 * Sao (စဝ်), an honorific used in Burmese names
 * SAO (biscuit), an Australian cracker biscuit
 * Chad national football team, nicknamed Sao
 * Ligi Sao (born 1992), a New Zealand rugby league footballer
 * Session-At-Once, a recording mode for optical discs
 * Security Advisory Opinion, a U.S. visa decision-making process
 * Specified Associated Organisation, an organization of members of the British Liberal Democrats
 * São Tomé and Príncipe