AC2 may refer to:
In video gaming Ace Combat 2 Armored Core 2 Asheron's Call 2 Assassin's Creed II
Other uses AC2, a ranking grading within the Royal Air Force between 1919 and 1964 AC-2, a submarine telecommunications cable system AC-2 Buffalo, a transport aircraft AC2: Combat Shield and Mini-adventure, an accessory for Dungeons & Dragons Southern Pacific class AC-2, a class of steam locomotives TRAXX F140 AC2, a locomotive AC2 Treated lumber