List of highways numbered 12B

The following highways are numbered 12B:

United States

 * New England 12B.svg New England Route 12B (former)
 * Gadsden County 12B.svg County Road 12B (Gadsden County, Florida)
 * Missouri Route 12B (former)
 * N SPUR 12B.svg Nebraska Spur 12B
 * NY-12B.svg New York State Route 12B
 * CR 12B jct.svg County Route 12B (Cayuga County, New York)
 * WA-SSH12-B.svg Secondary State Highway 12-B (Washington) (former)