JSS
- JS (disambiguation)
- JS2 (disambiguation)
- JSS (The Walking Dead)
- James Striar School of General Jewish Studies
- Janathipathiya Samrakshana Samithy
- Japan Statistical Society
- Japanese School of Suzhou
- Joint Surveillance System
- Joint support ship
- Journal of the Siam Society
- Joyson Safety Systems
- Junior Solar Sprint
- Jurong Secondary School
- Jönköpings SS
- Network Security Services
- Operation Imposing Law
- Protecteur-class auxiliary vessel