L55

L55 or variation, may refer to:


 * Aer Lualdi L.55, a helicopter
 * Daihatsu L55, a kei-car
 * Junkers L55, a V-12 engine
 * Rheinmetall Rh-120, L55 subtype; a 120mm gun
 * 5.2 cm SK L/55 naval gun, a naval gun
 * Scania-Vabis L55, a truck
 * L55 train set (bullet train), an E3 Series Shinkansen
 * HMS L55, an L-class submarine of the British Royal Navy
 * HMS Winchester, a W-class destroyer of the British Royal Navy