List of highways numbered 518
Route 518, or Highway 518, may refer to:
Canada
- Manitoba Provincial Road 518
- Ontario Highway 518
United Kingdom
- A518 road
United States
- Florida State Road 518
- County Road 518
- Louisiana Highway 518
- Maryland Route 518
- Montana Secondary Highway 518
- Nevada State Route 518
- County Route 518
- New Mexico State Road 518
- Ohio State Route 518
- Pennsylvania Route 518
- South Carolina Highway 518
- Farm to Market Road 518, Texas
- Texas State Highway Loop 518
- Virginia State Route 518
- Washington State Route 518