| State: | KY |
| Type: | KY |
| Route: | 172 |
| Map Custom: | yes |
| Map Notes: | KY 172 highlighted in red |
| Length Mi: | 33.884 |
| Length Ref: | [1] |
| Direction A: | South |
| Terminus A: | in West Liberty |
| Direction B: | North |
| Terminus B: | near Paintsville |
| Counties: | Morgan, Johnson |
| Previous Type: | KY |
| Previous Route: | 171 |
| Next Type: | KY |
| Next Route: | 173 |
Kentucky Route 172 (KY 172) is a 33.884adj=midNaNadj=mid state highway in Kentucky that runs from U.S. Route 460 (US 460) and KY 7 in western West Liberty to KY 40 northwest of Paintsville.