| State: | AL |
| Type: | AL |
| Route: | 129 |
| Map Custom: | yes |
| Length Mi: | 41.2 |
| Length Ref: | [1] |
| Direction A: | South |
| Terminus A: | north of Fayette |
| Junction: | near Winfield |
| Direction B: | North |
| Terminus B: | in Haleyville |
| Previous Type: | AL |
| Previous Route: | 128 |
| Next Type: | AL |
| Next Route: | 130 |
State Route 129 (SR 129) is a 41.2adj=midNaNadj=mid state highway in Fayette and Marion counties in the northwestern part of the U.S. state of Alabama. The southern terminus of the highway is at U.S. Route 43 (US 43) and SR 171 north of Fayette. The northern terminus of the highway is at an intersection with SR 13 in Haleyville.
SR 129 begins at an intersection with US 43/SR 171 north of Fayette. After only 1.3miles, SR 129 intersects SR 102. While going through the town of Glen Allen, SR 129 intersects the southern terminus of SR 233. Then, SR 129 enters Marion County. Before reaching Winfield, SR 129 has a concurrency with SR 118 for 1.4miles. While heading north toward Brilliant, SR 129 has an interchange with Interstate 22 (I-22)/US 78/SR 4 then heads north to Brilliant through wooded areas. Before reaching its northern terminus, SR 129 intersects US 278 (internally designated as SR 74) and SR 241. SR 129 reaches its northern terminus, at an intersection with SR 13 in Haleyville.