| State: | AL |
| Type: | AL |
| Route: | 172 |
| Map Custom: | yes |
| Maint: | ALDOT |
| Length Mi: | 24.420 |
| Length Round: | 3 |
| Length Ref: | [1] |
| Direction A: | West |
| Terminus A: | in Vina |
| Junction: | in Hackleburg |
| Direction B: | East |
| Terminus B: | in Bear Creek |
| Counties: | Franklin, Marion |
| Previous Type: | AL |
| Previous Route: | 171 |
| Next Type: | AL |
| Next Route: | 173 |
State Route 172 (SR 172) is a 24.42miles state highway that serves as an east-west connection between Vina and Bear Creek through Franklin and Marion Counties. SR 172 intersects SR 19 at its western terminus and SR 13 at its eastern terminus.
SR 172 begins at its intersection with SR 19 in Vina. From this point, SR 172 travels in a southeasterly direction where it meets SR 187 in Hodges. From Hodges, the route continues generally in its eastern direction and intersects US 43/SR 17 in Hackleburg. From this point, SR 172 again continues generally in an easterly direction and intersects SR 237, in addition to sharing a 0.435miles concurrency with SR 241, prior to reaching its eastern terminus at SR 13 in Bear Creek.