CP2 may refer to: * Ap star, a class of chemically-peculiar stars * Chicago Pile-2, a later development of CP-1, the World's first artificial nuclear reactor * Complex projective plane , in mathematics * Ceruloplasmin, an enzyme * Child's Play 2, a 1990 American horror film * Warren CP-2, an experimental biplane * CP2: an EEG electrode site according to the 10-20 system * Elias MRT station, MRT station code