ALC may refer to:

• Alicante Airport, by IATA airport code
• Alliance station, Ohio, US, Amtrak code

• Atlantic Lottery Corporation
• A.L.C, US fashion company

• Air Lease Corporation
• American Lacrosse Conference
• American Legend Cooperative, North American mink fur marketing cooperative
• American Lutheran Church (1930), until 1960
• American Lutheran Church, 1960 - 1987
• Army Legal Corps
• Atlantic Lacrosse Conference
• Australian Lutheran College

• Acetylcarnitine, an acetylated form of L-carnitine, naturally produced by the human body
• Air Logistics Center, of the US Air Force
• ALC (automobile), UK
• Asynchronous Layered Coding
• Landing Craft Assault, Britain, WWII
• ALC201A, ALC202, etc., Avance Logic AC'97 audio chipsets
• Attributive Concept Language with Complements, a description logic
• Automatic level control in electronics
• Aviation Logistics Center, a US Coast Guard logistics base located at Coast Guard Air Station Elizabeth City