List of highways numbered 12B
The following highways are numbered 12B:
United States
- New [England Route 12B]
- County [Road 12B (Gadsden County, Florida)]
- Missouri Route 12B
- Nebraska [Spur 12B]
- New [York State Route 12B]
- * County Route 12B (Cayuga County, New York)
- Secondary [State Highway 12-B (Washington)]