J12 may refer to:
Vehicles edit
Aircraft edit
- Nanchang J-12, a prototype Chinese fighter
Automobiles edit
- Hispano-Suiza J12, a French luxury car
- Subaru J12, a Japanese hatchback
Ships edit
- HSwMS Sundsvall (J12), a Visby-class destroyer of the Swedish Navy
Other uses edit
- Chanel J12, a Swiss-made watch
- County Route J12 (California)
- Triangular bipyramid, a Johnson solid (J12)
- Marlboro Pike Line, a bus route in the Washington Metro Area
- Viral pneumonia