List of highways numbered 12B

The following highways are numbered 12B:

United States

• New England Route 12B (former)
• County Road 12B (Gadsden County, Florida)
• Missouri Route 12B (former)
• Nebraska Spur 12B
• New York State Route 12B
• County Route 12B (Cayuga County, New York)
• Secondary State Highway 12-B (Washington) (former)