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
- 12B, a short-lived Mazda Wankel engine
See also 
|This disambiguation page lists articles associated with the same title formed as a letter-number combination.
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