A2 class or Class A2 may refer to:

A2-class Melbourne tram LNER Class A2, 4-6-2 steam locomotives LNER Peppercorn Class A2, 4-6-2 steam locomotives LNER Thompson Class A2 (disambiguation) Milwaukee Road class A2, 4-4-2 steam locomotives Victorian Railways A2 class, 4-6-0 steam locomotives