TSA

TSA may refer to:

Organizations

 * Transportation Security Administration, of the US Department of Homeland Security
 * Technology Student Association
 * Tenant Services Authority, a former regulatory body in England
 * Thailand Swimming Association, the aquatic sports government of Thailand
 * Theosophical Society in America
 * The Scout Association, a UK scouting organisation
 * 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, US
 * The Sports Authority, former name of the defunct sports retailer Sports Authority

Education

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

Places

 * Taipei Songshan Airport (IATA 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

Arts 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 US 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