List of highways numbered 255
The following highways are numbered 255:
Canada
- Manitoba Provincial Road 255
- New Brunswick Route 255
- Nova Scotia Route 255
- Quebec Route 255
- Saskatchewan Highway 255
Costa Rica
- National Route 255
Japan
- Japan National Route 255
Korea, South
- Gangjin–Gwangju Expressway
United Kingdom
- road
- B255 road
United States
- Interstate 255
- Alabama State Route 255
- Arkansas Highway 255
- California State Route 255
- Florida State Road 255
- Georgia State Route 255
- Illinois Route 255
- K-255
- Kentucky Route 255
- Maryland Route 255
- Montana Secondary Highway 255
- New Mexico State Road 255
- New York State Route 255
- Ohio State Route 255
- Oregon Route 255
- Pennsylvania Route 255
- Tennessee State Route 255
- Texas State Highway 255
- Utah State Route 255
- Virginia State Route 255
- Wyoming Highway 255