W12

W12 may refer to:

Automobiles

 * McCormick W-12, a farm tractor
 * Mercedes-AMG F1 W12 E Performance, a racing car
 * Volkswagen W12, a concept car

Other uses

 * Amangu language
 * British NVC community W12, a woodland community in the British National Vegetation Classification system
 * Cierva W.11 Air Horse, a British helicopter proposal
 * Hansa-Brandenburg W.12, a fighter floatplane
 * Icosidodecahedron
 * London Buses route W12
 * W12 engine, a twelve-cylinder engine
 * Volkswagen Group W-12 engine
 * W12 nuclear warhead, an American nuclear weapon design
 * West 12, a shopping centre in London
 * W12, a postcode district in London, England