Sia

Sia may refer to:

People

Sia Berkeley (born 1985), British actress
Sia Figiel (born 1967), Samoan novelist, poet and painter
Sia Furler (born 1975), Australian singer
Sia Koroma (born 1958), Sierra Leonean biochemist and psychiatric nurse, wife of Sierra Leone President Ernest Bai Koroma
Beau Sia (born 1976), American slam poet

SIA may mean:

Singapore Airlines
Seychelles International Airways
Società Italiana Aviazione, a subsidiary of Fiat that built aircraft and aero engines between 1914 and 1918
Senai International Airport
Sangster International Airport
SIA Ltd, suppliers of Geographic Information System (GIS) solutions and services
Service in Informatics and Analysis, provided batch and remote terminal access to mainframe computers, from 1967 to the early 1990s
SOCO International (London stock exchange symbol SIA), an international oil and gas exploration and production company
Subaru of Indiana Automotive, Inc.

Secret Intelligence Australia
Serbian Intelligence Agency
Security Industry Authority, UK licensing authority for the private security industry
Security Industry Association, for makers and handlers of electronic and physical security products
Securities Industry Association, in finance
Semiconductor Industry Association
Society for Industrial Archeology
Survivability and Information Assurance
Survivors of Incest Anonymous
Swiss Society of Engineers and Architects (Schweizerischer Ingenieur- und Architekten-Verein / Société suisse des ingénieurs et des architectes / Società svizzera degli ingegneri e degli architetti)
The Safety Institute of America
Satellite Industry Association

Staten Island Academy
Smoothing via Iterative Averaging
Social impact assessment
Self-Indication Assumption
Sequential Injection Analysis, a chemistry-related automation technique, similar to Flow injection analysis