ACP may stand for:

• Africa, Caribbean and Pacific, the countries that are signatories of the Cotonou Agreement.
• Airlines Control Program, an operating system developed by IBM for processing airline reservations and related data.
• American College of Physicians
• Association of Chess Professionals, and organisation to protect professional chess players' rights and promote the game of chess.
• Automatic Colt Pistol, an ammunition standard.
• Australian Consolidated Press, a major publisher of magazines in Australia.
• Automatic Cell Planning , a term used in mobile communications .