LAC is a three-letter abbreviation that may refer to:

* California State Prison, Los Angeles County
* L2TP Access Concentrator
* La Crescenta, California
* Lancashire Aero Club
* Latin America and the Caribbean, in the United Nations geoscheme
* Latin America and the Caribbean, UNESCO region
* Latin American Countries (Latin America)
* Leading Aircraftman
* Liberal arts college
* Library and Archives Canada
* Light Attack Craft
* Lignes Aériennes Congolaises
* Line of Actual Control
* Lockheed Aircraft Company
* Long run average cost
* Los Angeles Clippers
* Los Angeles County
* The ICAO operator designator for Lockheed Aircraft Corporation, United States.
* Lithuanian Automobile Club, a member of the FIA

ee also

* Lac
* Lac (disambiguation)

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