| State: | KY |
| Type: | KY |
| Route: | 173 |
| Map Custom: | yes |
| Map Notes: | KY 173 highlighted in red |
| Length Mi: | 10.648 |
| Length Ref: | [1] |
| Direction A: | South |
| Terminus A: | in rural Elliott Co |
| Direction B: | North |
| Terminus B: | in rural Rowan Co |
| Counties: | Elliott, Rowan |
| Previous Type: | KY |
| Previous Route: | 172 |
| Next Type: | KY |
| Next Route: | 174 |
Kentucky Route 173 (KY 173) is a 10.648adj=midNaNadj=mid state highway in Kentucky that runs from KY 7 in rural Elliott County southwest of Sandy Hook to KY 32 in rural Rowan County east of Morehead.