JSD is a three-letter abbreviation with multiple meanings, as described below:
- Jensen–Shannon divergence
- Jackson System Development
- Doctor of Juridical Science
- Joint Service Designation, For defence
- Joint science department
- Joint standard deviation
- James Simpson-Daniel, English rugby union player.
- Jet Suite Document
- Jatiyo Samajtantrik Dal
- John San Desu
- Judicial Security Division
- Jack Saul Diaz
- Junior Software Developer