L12

L12 may refer to:

Ships and boats

• HMS L12, a submarine of the Royal Navy
• HMS Albrighton (L12), a destroyer of the Royal Navy
• HMS Ocean (L12), a helicopter carrier of the Royal Navy
• HMS Sandwich (L12), a sloop of the Royal Navy
• Soviet submarine L-12, a Leninets-class submarine

Other uses

• Lectionary 12, a 12th-century, Greek manuscript of the New Testament
• Liberty L-12, an American aircraft engine
• Lockheed L-12 Electra Junior, an American passenger aircraft
• LSWR L12 class, a class of steam locomotives
• TEDOM L 12, a Czech bus
• L-12, an L-class blimp of the United States Navy