List of highways numbered 243
The following highways are numbered 243:
Canada
- Manitoba Provincial Road 243
- Prince Edward Island Route 243
- Quebec Route 243
Costa Rica
- National Route 243
Japan
- Japan National Route 243
United Kingdom
- road
- B243 road
United States
- Alabama State Route 243
- Arkansas Highway 243
- California State Route 243
- Connecticut Route 243
- Florida State Road 243
- Georgia State Route 243
- Indiana State Road 243
- Iowa Highway 243
- K-243
- Kentucky Route 243
- Maryland Route 243
- Minnesota State Highway 243
- Montana Secondary Highway 243
- New Mexico State Road 243
- New York State Route 243
- Ohio State Route 243
- Pennsylvania Route 243
- South Carolina Highway 243
- Tennessee State Route 243
- Texas State Highway 243
- *Farm to Market Road 243
- * Ranch to Market Road 243
- Utah State Route 243
- Vermont Route 243
- Virginia State Route 243
- Washington State Route 243
- Wisconsin Highway 243