JSR may refer to:
- Java Specification Request, a proposal made in the Java Community Process
- Joint spectral radius, in mathematics
- Jet Set Radio, a video game
- The Journal of Sex Research
- John Septimus Roe Anglican Community School (also JSRACS)
- Assembly language instruction for "jump to subroutine"
- The Journal of Sedimentary Research, published by the Society for Sedimentary Geology (SEPM)
- Jonathan's Space Report, an online newsletter tracking worldwide space launches and activities, self-published by Harvard astrophysicist Jonathan McDowell