2J or 2-J may refer to:
- 2J, IATA code for Air Burkina
- Chaparral 2J, a model of Chaparral Cars
- 2J, an abbreviation for Second Epistle of John
- Kawasaki P-2J
- Thor DSV-2J, see Thor DSV-2
- P2J, a model of Lockheed P-2 Neptune
- ISS 2J/A, alternate designator for STS-127
- SSH 2J (WA), see Washington State Route 527
- Thompson School District R2-J
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