H12

H12 may refer to:

Vehicles

 * Bell H-12, an American utility helicopter
 * Curtiss H-12, an American flying boat
 * Hiller H-12, an American helicopter
 * HMS Achates (H12), a Royal Navy A-class destroyer
 * HMS H12, a Royal Navy H-class submarine
 * LSWR H12 class, a British steam railcar

Other uses

 * H-12, Islamabad, site of a campus of the National University of Sciences & Technology
 * Highway H12 (Ukraine)
 * London Buses route H12, a Transport for London contracted bus route