J2
- 2J (disambiguation)
- AEG J.II
- ATC code J02
- Albatros J.II
- Allard J2 (disambiguation)
- Auster J-2 Arrow
- Azerbaijan Airlines
- County Route J2 (California)
- Director of Military Intelligence (Ireland)
- HMAS J2
- Haplogroup J2 (Y-DNA)
- J-2 visa
- J. League Division 2
- J2 (comics)
- J2 (music channel)
- J2 (orca)
- J2 (roller coaster)
- J2 League
- J2 coefficient
- JAC J2
- JII (disambiguation)
- Janko group J2
- Jefatura de Inteligencia del Estado Mayor Conjunto de las Fuerzas Armadas
- Jinja2
- Johnson solid
- Joint Chiefs of Staff
- Junkers J 2
- MG J-type
- McCulloch J-2
- Mikoyan-Gurevich MiG-15
- Morris Commercial J2
- Rocketdyne J-2
- S/2003 J 2
- Samsung Galaxy J2
- Samsung Galaxy J2 Prime
- SuperH
- TVB
- TVB Plus
- Taylor J-2