N12

N12 may refer to:

Roads

 * N12 (South Africa)
 * N12 road (Ghana)
 * N12 road (Ireland)
 * Nebraska Highway 12, United States
 * Route nationale 12, France

Other uses

 * N12 (Art Group), China
 * HMS Clyde (N12), a submarine of the Royal Navy
 * Interstitial nephritis
 * Lakewood Airport, New Jersey, United States
 * LNER Class N12, a class of British steam locomotives
 * Nissan Pulsar (N12), a Japanese car
 * Nitrogen-12, an isotope of nitrogen
 * Nylon 12, a polymer
 * N12, a postcode district in the N postcode area, North London, England