| State: | KY |
| Type: | KY |
| Route: | 635 |
| Map Custom: | yes |
| Map Notes: | KY 635 highlighted in red |
| Length Mi: | 13.566 |
| Direction A: | West |
| Terminus A: | near Bethelridge |
| Junction: | in Science Hill |
| Direction B: | East |
| Terminus B: | near Dabney |
| Counties: | Pulaski |
| Previous Type: | KY |
| Previous Route: | 634 |
| Next Type: | KY |
| Next Route: | 636 |
Kentucky Route 635 (KY 635) is a 13.566adj=midNaNadj=mid state highway in Pulaski County, Kentucky, that runs from Kentucky Route 70 east of Bethelridge to Kentucky Route 39 southwest of Dabney via Science Hill.