12B (disambiguation)

12B is a 2001 Tamil movie.

12B may also refer to:


 * New York State Route 12B, a state highway in the central part of New York
 * Missouri Route 12B
 * Nebraska Spur 12B
 * WASP-12b, an extrasolar planet
 * HAT-P-12b, an extrasolar planet
 * Boron-12 (12B), an isotope of boron
 * 12B, a short-lived Mazda Wankel engine
 * 12B United States MOS enlisted (military occupational specialty) for "Combat Engineer"
 * 12b, an alternative name for the Ontario Academic Credit program