J11 may refer to:
Vehicles
editAircraft
edit- Fiat J 11, an Italian sesquiplane fighter in service with the Swedish Air Force
- Junkers J 11, a German ground-attack aircraft
- Shenyang J-11, a Chinese jet fighter
Automobiles
edit- James Comet J11, an English motorcycle
- Nissan Qashqai J11, a Japanese SUV
Locomotives
edit- GSR Class J11, an Irish steam locomotive
- LNER Class J11, a class of British steam locomotives
Ships
edit- HMS Bramble (J11), a Halcyon-class minesweeper of the Royal Navy
- HSwMS Visby (J11), a Visby-class destroyer of the Swedish Navy
Other uses
edit- County Route J11 (California)
- DEC J-11, a microprocessor chip set
- Gyroelongated pentagonal pyramid, a Johnson solid (J11)