| Acronym | Definition |
|---|
| JSA | James Spence Authentication (memorabilia; various locations) |
| JSA | Justice Society of America (see JLA) |
| JSA | Job Safety Analysis |
| JSA | Joint Security Area |
| JSA | Japan Squash Association |
| JSA | Jobseeker's Allowance |
| JSA | Japanese Standards Association |
| JSA | Junior State of America (formerly Junior Statesmen of America) |
| JSA | Junior Statesmen of America (now Junior State of America) |
| JSA | Journal of Substance Abuse |
| JSA | Java Stream Assembly |
| JSA | Joint Staff Assessment |
| JSA | Jewelers' Security Alliance |
| JSA | Japanese Shipowners' Association |
| JSA | Joint Sales Agreement |
| JSA | Japanese Society of Allergology |
| JSA | Japanese Student Association |
| JSA | Japan Sumo Association |
| JSA | Judaica Sound Archives (Florida Atlantic University) |
| JSA | Joint Service Agreement |
| JSA | Joint Subcommittee on Aquaculture |
| JSA | Jewish Student Association |
| JSA | Jamaica Squash Association |
| JSA | Jardine Sports Association (Hong Kong) |
| JSA | Japanese Society of Antioxidants |
| JSA | Japanese Society of Auckland (Auckland, New Zealand) |
| JSA | Japanese Society of Anesthesiologists |
| JSA | John Stark Associates (Trumbull, CT) |
| JSA | Japan Securities Agents, Ltd. |
| JSA | Jaisalmer Airport (India) |
| JSA | Japan-Singapore Association |
| JSA | Joe Shuster Awards |
| JSA | Japan Sportfishing Association |
| JSA | Japan Stretching Association |
| JSA | Japan Softball Association |
| JSA | Japanese Sumo Association |
| JSA | Junior Semester Abroad |
| JSA | Joint Systems Architecture |
| JSA | Japan Sabo Association |
| JSA | Justice System Assessment (various locations) |
| JSA | Japanese Society of Adelaide (Adelaide, Australia) |
| JSA | Jammer System Analysis |
| JSA | Japan Society for Archaea (microorganisms) |