List of highways numbered 312

The following highways are numbered 312:

Canada

 * Manitoba secondary 312.svg Manitoba Provincial Road 312
 * Nova Scotia Route 312.svg Nova Scotia Route 312
 * PEI_Highway_312.svg Prince Edward Island Route 312
 * Saskatchewan Highway 312 (jct).svg Saskatchewan Highway 312

China

 * Kokudou 312(China).svg China National Highway 312

Costa Rica

 * CR RNT 312.svg National Route 312

Japan

 * Japanese National Route Sign 0312.svg Japan National Route 312

United States

 * US 312.svg U.S. Route 312 (former)
 * Arkansas 312.svg Arkansas Highway 312
 * Florida 312.svg Florida State Road 312
 * Georgia 312.svg Georgia State Route 312 (former)
 * Indiana 312.svg Indiana State Road 312
 * Elongated circle 312.svg Kentucky Route 312
 * Louisiana 312.svg Louisiana Highway 312
 * MD Route 312.svg Maryland Route 312
 * MN-312.svg Minnesota State Highway 312 (former)
 * New Mexico 312.svg New Mexico State Road 312
 * New York:
 * NY-312.svg New York State Route 312
 * New York State Route 312 (former)
 * County Route 312 (Albany County, New York)
 * County Route 312 (Wayne County, New York)
 * OH-312.svg Ohio State Route 312
 * PA-312.svg Pennsylvania Route 312 (former)
 * Ellipse sign 312.svg Puerto Rico Highway 312
 * Secondary Tennessee 312.svg Tennessee State Route 312
 * Texas:
 * Texas 312.svg Texas State Highway 312 (proposed)
 * Texas Spur 312.svg Texas State Highway Spur 312
 * Texas FM 312.svg Farm to Market Road 312
 * Utah SR 312.svg Utah State Route 312
 * Virginia 312.svg Virginia State Route 312
 * WIS 312.svg Wisconsin Highway 312
 * WY-312.svg Wyoming Highway 312