| State: | PA |
| Type: | PA |
| Route: | 418 |
| Map Custom: | yes |
| Length Mi: | 2.750 |
| Length Round: | 3 |
| Length Ref: | [1] |
| Established: | 1928 |
| Direction A: | South |
| Terminus A: | in Wheatland |
| Direction B: | North |
| Terminus B: | in Hermitage |
| Counties: | Mercer |
| Previous Type: | PA |
| Previous Route: | 417 |
| Next Type: | PA |
| Next Route: | 419 |
Pennsylvania Route 418 (PA 418) is a 2.75adj=midNaNadj=mid state highway located in Mercer County, Pennsylvania. The southern terminus is at PA 760/PA 718 in Wheatland. The northern terminus is at US 62 in Hermitage.
PA 418 begins at an intersection with PA 718 and PA 760 in the borough of Wheatland, heading north on two-lane undivided Council Street. The route passes through residential areas, turning northeast onto Mercer Avenue and heading into the city of Farrell. The road passes more homes and reaches an intersection with PA 518. A short distance after this junction, PA 418 enters the city of Hermitage and heads into more wooded areas with a few residences. The route turns north onto Maple Drive and reaches its northern terminus at US 62.[2]