List of highways numbered 321

The following highways are numbered 321:

Canada

 * Nova Scotia Route 321.svg Nova Scotia Route 321
 * Saskatchewan Highway 321 (jct).svg Saskatchewan Highway 321

China

 * Kokudou 321(China).svg China National Highway 321

Costa Rica

 * CR RNT 321.svg National Route 321

Japan

 * Japanese National Route Sign 0321.svg Japan National Route 321

United States

 * US 321.svg U.S. Highway 321
 * Arkansas 321.svg Arkansas Highway 321
 * Arkansas 321S.svg Arkansas Highway 321 Spur
 * Georgia 321.svg Georgia State Route 321 (former)
 * Elongated circle 321.svg Kentucky Route 321
 * Louisiana 321.svg Louisiana Highway 321
 * Ellipse sign 321.svg Mississippi Highway 321
 * Nevada 321.svg Nevada State Route 321
 * New Mexico 321.svg New Mexico State Road 321
 * New York:
 * NY-321.svg New York State Route 321
 * Erie County 321 NY.svg County Route 321 (Erie County, New York)
 * NC 321.svg North Carolina Highway 321 (former)
 * OH-321.svg Ohio State Route 321
 * PA-321.svg Pennsylvania Route 321
 * Ellipse sign 321.svg Puerto Rico Highway 321
 * Secondary Tennessee 321.svg Tennessee State Route 321
 * Texas:
 * Texas 321.svg Texas State Highway 321
 * Texas Loop 321.svg Texas State Highway Loop 321
 * Texas FM 321.svg Farm to Market Road 321
 * Virginia 321.png Virginia State Route 321
 * Virginia State Route 321 (former)
 * WY-321.svg Wyoming Highway 321