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
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)