List of highways numbered 203
The following highways are numbered 203:
Canada
- Manitoba Provincial Road 203
- Newfoundland and Labrador Route 203
- Nova Scotia Route 203
- Prince Edward Island Route 203
- Quebec Route 203
Chile
China
Costa Rica
India
Japan
Belgium
- Belgium B203
Thailand
- Thailand Route 203
United Kingdom
- road
- B203 road
United States
- Alabama State Route 203
- California State Route 203
- Connecticut Route 203
- Georgia State Route 203
- Illinois Route 203
- Indiana State Road 203
- Iowa Highway 203
- K-203 (Kansas highway)
- Kentucky Route 203
- Maine State Route 203
- Massachusetts Route 203
- M-203 (Michigan highway)
- Montana Secondary Highway 203
- New Mexico State Road 203
- New York State Route 203
- Ohio State Route 203
- Oregon Route 203
- Pennsylvania Route 203
- South Carolina Highway 203
- South Dakota Highway 203
- Tennessee State Route 203
- Texas State Highway 203
- * Texas State Highway Spur 203
- Utah State Route 203
- Virginia State Route 203
- Washington State Route 203