JSA
- Al Adl Wa Al Ihssane
- AppleScript
- JSA (comic book)
- Jaisalmer Airport
- Japan Shogi Association
- Japan Sumo Association
- Japanese School of Amsterdam
- Japanese Standards Association
- Jetstar Asia
- Job Safety Analysis
- Job Services Australia
- Jobseeker's Allowance
- Joint Security Area
- Joint Security Area (film)
- Joint sales agreement
- Joseph Smith Academy
- Junior State of America
- Justice Society of America
- Kell antigen system
- Thomas Jefferson National Accelerator Facility