JSA

JSA may refer to:


 * Jaisalmer Airport (IATA Code)
 * Japan Shogi Association
 * Japan Sumo Association
 * Japanese School of Amsterdam
 * Japanese Standards Association
 * JavaScript for Automaton, a scripting language for macOS
 * Jetstar Asia Airways (ICAO Code)
 * Job Safety Analysis
 * Job Services Australia
 * Jobseeker's Allowance in the United Kingdom
 * Joint sales agreement
 * Joint Security Area a place between South and North Korea where the two country forces stand face-to-face.
 * Joint Security Area (film), a 2000 South Korean film
 * Joseph Smith Academy, a campus of Brigham Young University once located in Nauvoo, Illinois
 * Junior State of America, a student run political debate organization
 * Justice Society of America, a DC Comics superhero team
 * JSA (comic book), a comic book title from DC Comics
 * Jsa, a blood antigen
 * Jefferson Science Associates, the non-profit managing and operating contractor of the Thomas Jefferson National Accelerator Facility