L6 may refer to:
- L6, a variety of low-alloy special purpose steel
- Mauritania Airlines International (IATA code: L6, ICAO code: MAI)
- Straight-6 engine
- L6, Bell Telephone Laboratories' Low-Level Linked List Language
- L6, instance of mathematical Lp space
- L 6 (keelboat), class of sailboat
- ISO/IEC 8859-10 (Latin-6), an 8-bit character encoding
- Lower sixth (grade 12) in British secondary education
Products by model number
edit- Gibson L6-S guitar
- Motorola SLVR L6 phone
- PRR L6 locomotives
- L6 Wombat firearm
Aircraft:
- Daimler D.I fighter
- Interstate Cadet L-6A light passenger plane
- Lucas L6, French light aircraft