JSA may refer to:
- Jaisalmer Airport (IATA Code)
- Japan Sumo Association
- Justice Society of America, a DC Comics superhero team
- The Joint Security Area between South and North Korea
- Joint Security Area, a South Korean film
- Junior State of America, a student run political debate organization
- Japanese Standards Association
- Job Safety Analysis
- Jobseeker's Allowance in the UK
- Job Services Australia
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