TSA is the Transportation Security Administration, a United States federal government agency.

TSA, tsa, tSA, or Tsa may also refer to:

Organizations

  • Technology Student Association
  • Tenant Services Authority, a former regulatory body in England
  • Thailand Swimming Association, the governing body for aquatic sports in Thailand
  • Theosophical Society in America
  • The Scout Association, a British scouting organisation
  • The Sports Authority, former name of the defunct sports retailer Sports Authority
  • Tourette Syndrome Association, former name of the Tourette Association of America
  • Transpacific Stabilization Agreement, a research and discussion forum for the main transpacific container shipping lines
  • Trans States Airlines, United States
  • Turkish Space Agency, a government agency for national aerospace research in Turkey
  • The Salvation Army

Education

  • Tattnall Square Academy, Macon, Georgia, United States
  • Thinking Skills Assessment, a generic university admissions test
  • Tiong Se Academy, Chinese school, the Philippines
  • The Sharon Academy, Vermont, United States
  • Territory-wide System Assessment, a Hong Kong academic assessment program from 2004 to 2016
  • Tulane School of Architecture, New Orleans, Louisiana, United States
  • Toledo School for the Arts, a public charter school in Toledo, Ohio, United States

Places

  • Taipei Songshan Airport (IATA code)
  • Tri-State Airport in Huntington, West Virginia, United States (FAA: HTS)
  • Tin Sau stop, Hong Kong (MTR station code)
  • Titanium Security Arena, a sports stadium in Australia

Science and technology

  • TS/A, a mouse mammary carcinoma cell line
  • Temperature swing adsorption, a gas separation technique
  • Time Stamping Authority, carrying out cryptographic trusted timestamping
  • Trichostatin A, an inhibitor of histone deacetylases
  • Trypticase soy agar, a common laboratory plating media
  • Tumor-specific antigen

<!--* Thermal sprayed aluminum, see Thermal spraying (fails WP:DABMENTION / WP:DABACRO-->

Art and entertainment

  • TSA (band) (Tajne Stowarzyszenie Abstynentów or Teetotallers' Secret Association), a Polish heavy metal/hard rock band
  • Transformation Story Archive, web site archiving amateur fiction
  • Toilet Safety Administration, parody of the U.S. Transportation Security Administration in TV episode "Reverse Cowgirl" (South Park)

Other uses

  • Tax sheltered annuity or 403(b) plan
  • Technicien supérieur de l'aviation, a certification in French civil aviation
  • Treasury single account, a financial policy in Nigeria
  • Tsaangi language, an ISO 639-3 code
  • Tsa (Armenian letter)