Sia (born 1975) is an Australian singer and songwriter.
Sia or SIA may also refer to:
Organizations
- Secret Intelligence Australia, a British World War II intelligence unit
- Security Industry Association, for makers and handlers of electronic and physical security products
- Security Industry Authority, a British licensing authority for the private-security industry
- Securities Industry Association, in finance
- Semiconductor Industry Association
- Smithsonian Institution Archives
- Societe Internationale d’Acupuncture, a defunct French research organization
- Society for Industrial Archeology, a North American nonprofit organization
- Solidaridad Internacional Antifascista, a Spanish anarchist humanitarian organisation that existed during the Spanish Civil War
- Staten Island Academy, a US school
- Survivors of Incest Anonymous
- Service d'information aéronautique, the French Aeronautical Information Service
Businesses
- Service in Informatics and Analysis, provided batch and remote terminal access to mainframe computers, from 1967 to the early 1990s
- SIA Ltd, suppliers of geographic information software and services
- SOCO International (London stock exchange symbol SIA), an international oil and gas exploration and production company
- Sia Partners, a management consulting firm
- SIA S.p.A., an Italian information and communications technology company
Transportation
- Società Italiana Aviazione, a subsidiary of Fiat that built aircraft and aero engines between 1914 and 1918
- Subaru of Indiana Automotive, Inc., formerly Subaru-Isuzu Automotive, Inc.
- Seychelles International Airways, a former charter airline
- Singapore Airlines (ICAO code: SIA)
Places
- Sia (Pisidia), a town of ancient Pisidia, now in Turkey
- Sia, Cyprus, a village
- Sia, an ancient pieve (church with a baptistery) in Corsica
- Sangster International Airport, Jamaica
- Xi'an Xiguan Airport (IATA code: SIA)
People
- Sia Berkeley (born 1985), English actress
- Sia Figiel (born 1967), Samoan novelist, poet and painter
- Sia Koroma (born 1958), Sierra Leonean biochemist and psychiatric nurse; wife of Sierra Leonean President Ernest Bai Koroma
- Beau Sia (born 1976), American slam poet
- Edgar Sia (born 1977), Filipino billionaire property developer
Other uses
- Sia (god), a deification of wisdom in Egyptian mythology
- Sia (insect), a genus of insect
- Self-indication assumption, a philosophical principle
- Social impact assessment, a methodology
- Sia (title), a hereditary title in colonial Indonesia
- Style Icon Asia, formerly Style Icon Awards, an awards ceremony
See also
- Security Intelligence Agency (Bezbednosno-informativna agencija, BIA), a Serbian government intelligence agency
- Zia (disambiguation)
- Zia Pueblo, New Mexico, US