List of highways numbered 315
The following highways are numbered 315:
Canada
- Manitoba Provincial Road 315
- New Brunswick Route 315
- Prince Edward Island Route 315
- Quebec Route 315
China
Costa Rica
India
Japan
United States
- Interstate 315
- Arkansas Highway 315
- Connecticut Route 315
- Florida State Road 315
- Georgia State Route 315
- Iowa Highway 315
- Kentucky Route 315
- Louisiana Highway 315
- Maryland Route 315
- * Maryland Route 315
- Mississippi Highway 315
- Montana Secondary Highway 315
- New Mexico State Road 315
- New York:
- * New York State Route 315
- * County Route 315 (Erie County, New York)
- Ohio State Route 315
- * Ohio State Route 315C
- Pennsylvania Route 315
- South Carolina Highway 315
- Tennessee State Route 315
- Texas:
- * Texas [State Highway 315]
- * Farm to Market Road 315
- Utah State Route 315
- Vermont Route 315
- Virginia State Route 315
- Wyoming Highway 315
- Puerto Rico Highway 315
- U.S. [Virgin Islands Highway 315]