L9 may refer to: __NOTOC__
Military HMS L9, a British L class submarine L9 Bar Mine, a large rectangular British anti-tank landmine L9A1 51 mm light mortar, used by the British Army Royal Ordnance L9, a British tank gun USS L-9 (SS-49), an L-class submarine of the United States Navy
Science and technology 60S ribosomal protein L9, a protein that is encoded by the human RPL9 gene Level 9 Computing, a text-based game company LG Optimus L9, a mobile smartphone LG L9, a system on a chip for Smart TV devices Motorola SLVR L9, a mobile phone
Other uses Barcelona Metro line 9, in Barcelona, Spain Stinson L-9, a 1940s American light utility monoplane L9, IATA code of Lumiwings, a Greek airline L9, then-IATA code of Teamline Air, a former Austrian airline Li L9, a car model
See also 9L (disambiguation)