| State: | TN |
| Type: | TN |
| Route: | 149 |
| Maint: | TDOT |
| Map Custom: | yes |
| Map Notes: | SR 149 highlighted in red |
| Length Mi: | 22.31 |
| Length Round: | 2 |
| Direction A: | West |
| Terminus A: | in Erin |
| Junction: | in Cumberland City in Cumberland City |
| Direction B: | East |
| Counties: | Houston, Stewart, Montgomery |
| Previous Type: | Sec |
| Previous Route: | 148 |
| Next Type: | Sec |
| Next Route: | 150 |
State Route 149 (SR 149) is an east–west highway in Middle Tennessee. The road begins near Erin and ends just south of Clarksville. The current length is .
SR 149 begins in Houston County in Erin at an intersection with SR 49 near that route's junction with SR 13 just outside of Erin. SR 149 then goes northward and crosses into Stewart County.
It continues north and runs concurrently with SR 46 before entering Cumberland City. In Cumberland City, SR 46 breaks off and goes through downtown, while SR 149 bypasses the town to the east. It then intersects the short SR 434, a connector to SR 233 and provides access to the Cumberland Fossil Plant. SR 149 turns to the northeast to parallel the Cumberland River and enters Montgomery County.
It then goes east through Palmyra before ending at intersection with SR 13 and SR 48 just south of Clarksville.[1]