| State: | AL |
| Type: | AL |
| Route: | 173 |
| Map Custom: | yes |
| Maint: | ALDOT |
| Length Mi: | 14.462 |
| Length Round: | 3 |
| Length Ref: | [1] |
| Direction A: | South |
| Terminus A: | in Headland |
| Direction B: | North |
| Terminus B: | west of Abbeville |
| Counties: | Henry |
| Previous Type: | AL |
| Previous Route: | 172 |
| Next Type: | AL |
| Next Route: | 174 |
State Route 173 (SR 173) is a 14.462miles state highway that serves as a north-south connection between Headland and Abbeville in Henry County. SR 173 intersects US 431 at its southern terminus and SR 27 at its northern terminus.
SR 173 begins at its intersection with US 431 in Headland. From this point, SR 173 travels briefly towards the southwest before turning to the north as it leaves the town. From Headland, SR 173 follows a northerly track through its northern terminus at SR 27.