JS or js may refer to:
- Organizations
- Jonge Socialisten, a Dutch political group
- the IATA code for Air Koryo, North Korea's state-run airline
- the parent company of Sainsbury's Supermarkets
- JS Food Plan, a Korean pizza company
- JS Group, a Pakistani company
- Computing
- JavaScript
- JScript
- People
- Jang Hyun-seung, member of Beast (South Korean band)
- Jason Spezza