L11 or L-11 may refer to:
Vehicles Aircraft Albatros L 11, a German biplane bomber Daimler L11, a German monoplane fighter Lucas L11, a French ultralight
Locomotives LSWR L11 class, a British steam locomotive
Ships , a submarine of the United States Navy , a submarine of the Royal Navy , a destroyer of the Royal Navy , an amphibious warfare ships of the Royal Navy
Weapons
L-11 76.2 mm tank gun, a Soviet tank gun Blohm & Voss L 11, a German experimental anti-ship missile M2 Browning, a machine gun designated L11 by the British Army Royal Ordnance L11, a British tank gun L-11, the assembly number of the Little Boy atomic bomb dropped on Hiroshima
Other uses
60S ribosomal protein L11 Barcelona Metro line 11, a light metro line in Barcelona, Spain Mitochondrial ribosomal protein L11 Nikon Coolpix L11, a digital camera