List of highways numbered 312
The following highways are numbered 312:
Canada
- Manitoba Provincial Road 312
- Nova Scotia Route 312
- Prince Edward Island Route 312
- Saskatchewan Highway 312
China
- China National Highway 312
Costa Rica
- National Route 312
Cuba
- Road to Las Palacios
Japan
- Japan National Route 312
United Kingdom
- A312 road, Hampton to Harrow
United States
- U.S. Route 312
- Arkansas Highway 312
- Florida State Road 312
- Georgia State Route 312
- Indiana State Road 312
- Kentucky Route 312
- Louisiana Highway 312
- Maryland Route 312
- Minnesota State Highway 312
- New Mexico State Road 312
- New York:
- * New York State Route 312
- * New York State Route 312
- * County Route 312
- * County Route 312
- Ohio State Route 312
- Pennsylvania Route 312
- Puerto Rico Highway 312
- Tennessee State Route 312
- Texas:
- * Texas State Highway 312
- * Texas State Highway Spur 312
- Farm to Market Road 312
- Utah State Route 312
- Virginia State Route 312
- Wisconsin Highway 312
- Wyoming Highway 312