STAR is an acronym for: Organizations:
- Society for Telescopy, Astronomy, and Radio, a non-profit astronomy club in New Jersey
- Special Tasks and Rescue or Special Tactics and Response, synonyms for SWAT
- Special Tactics and Rescue (Singapore), of the Singapore Police Force
- Star (strategies + architecture), an architecture office in the Netherlands
- STAR (interbank network), an interbank network
- Standards for Technology in Automotive Retail, a non-profit automotive initiative
- STAR Events, a program of the Family, Career, and Community Leaders of America organization
- STAR Study Association RSM Erasmus University, Europe's largest student association
- Street Transvestite Action Revolutionaries, a transgender activist organization founded in 1970
- Supporters Trust At Reading, the Reading Football Club's supporters' trust
- , an organization that helps synagogues deepen their connection within the Jewish community
Fictional organizations:
- S.T.A.R. Labs, a fictional research organization in the DC Comics universe
- S.T.A.R.S. (Resident Evil); Special Tactics And Rescue Service, a fictional task force in the Resident Evil video game franchise
Technology:
- STAR detector, the Solenoidal Tracker At RHIC one of the major experimental setup at the Relativistic Heavy Ion Collider located at the Brookhaven National Laboratory
- Self-Defining Text Archive and Retrieval, a computer file format
- Shock Trauma and Rescue, or Shock Trauma Air Rescue, a synonym for air ambulance
- Source tree adaptive routing protocol, a method of organizing wireless mesh networks
Standardized tests:
- Standardized Testing and Reporting (STaR), a measure of school performance in California
- STAR (software), periodic assessments of reading (STAR Reading), early literacy (STAR Early Literacy, SEL), and mathematical (STAR Math) skills created by Renaissance Learning, Inc.
- Supplementary Tests of Achievement in Reading, published by the New Zealand Council for Educational Research
Other:
- Sekolah Tuanku Abdul Rahman, a secondary school in Malaysia
- Single-Handed Trans-Atlantic Race, also known as the OSTAR
- Situation, Task, Action, Result, an interview technique
- SMK Tengku Ampuan Rahimah, a secondary school in Klang, Malaysia
- Standard Terminal Arrival Route, the route that planes follow under instrument flight rules when they approach an airport
- Steroidogenic acute regulatory protein, known as StAR
- STAR TV (Asia), Asian television network owned by News Corporation
- Southern Tagalog Arterial Road, a Philippine highway
