List of highways numbered 403
The following highways are numbered 403:
Canada
Costa Rica
Croatia
Hungary
Japan
Thailand
United States
- Georgia [State Route 403]
- Indiana [State Road 403]
- New York:
- * New York State Route 403
- * County Route 403 (Albany County, New York)
- * County Route 403 (Erie County, New York)
- North Carolina Highway 403
- Pennsylvania Route 403
- Puerto Rico Highway 403
- Rhode Island Route 403
- South Carolina Highway 403
- Virginia State Route 403
- Washington State Route 403