| State: | TN |
| Type: | Sec |
| Route: | 251 |
| Maint: | TDOT |
| Map Custom: | yes |
| Map Notes: | SR 251 highlighted in red |
| Alternate Name: | River Road River Road Pike Old Hickory Boulevard |
| Length Mi: | 15.7 |
| Established: | July 1, 1983[1] |
| Direction A: | West |
| Terminus A: | south of Ashland City |
| Junction: | in Nashville in Nashville |
| Direction B: | East |
| Terminus B: | in Bellevue |
| Counties: | Cheatham, Davidson |
| Previous Type: | Sec |
| Previous Route: | 250 |
| Next Type: | Sec |
| Next Route: | 252 |
State Route 251 (SR 251) is a west - east secondary state highway in Middle Tennessee.
SR 251 begins in rural Cheatham County at an intersection with SR 249 (Sams Creek Road/River Road) south of Ashland City. It winds its way southeast along the banks of the Cumberland River as River Road to cross into Davidson County. It continues southeast as River Road Pike as it enters Nashville and has an intersection with US 70/SR 24 (Charlotte Pike), where SR 251 becomes part of Old Hickory Boulevard. It then continues south to have an interchange with I-40 (Exit 199) before entering Bellevue, where it comes to an end at an intersection with US 70S/SR 1 and Old Hickory Boulevard continues southward.[2]