LN

LN or ln may stand for:

*natural logarithm ("ln")
*Libyan Arab Airlines' IATA code
*Lingala language (ISO 639 alpha-2)
*Liquid Nitrogen
*Computing:
**ln (Unix), the Unix program
*Railways
**Louisville and Nashville Railroad reporting mark|LN
*Lymph node
*Lincoln, Lincolnshire: LN is the British post code for the region in eastern England which is served by Lincoln postal sorting office. (See list of UK areas). This is sub-divided into numbered districts. (See list of UK districts). These are further sub-divided into individual premises or small groups of premises.
* In chemical notation, Ln can refer to the group of lanthanoids
* Lawful Neutral, an alignment in the Dungeons & Dragons role-playing game
* In military, Local national