J11

J11 may refer to:

Aircraft

 * 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

 * James Comet J11, an English motorcycle
 * Nissan Qashqai J11, a Japanese SUV

Locomotives

 * GSR Class J11, an Irish steam locomotive
 * LNER Class J11, a class of British steam locomotives

Ships

 * HMS Bramble (J11), a Halcyon-class minesweeper of the Royal Navy
 * HSWMS Visby, a Visby-class destroyer of the Swedish Navy

Other uses

 * County Route J11 (California)
 * DEC J-11, a microprocessor chip set
 * Gyroelongated pentagonal pyramid, a Johnson solid (J11)