 State Route 431 | ||||
|---|---|---|---|---|
 TN 431 highlighted in red | ||||
| Route information | ||||
| Maintained by TDOT | ||||
| Length | 16.58 mi[1] (26.68 km) | |||
| Major junctions | ||||
| South end |    Future I-169 / US 45E / SR 22 southeast of Martin | |||
   US 45W / SR 5 in Union City | ||||
| North end |  US 51 in Union City | |||
| Location | ||||
| Country | United States | |||
| State | Tennessee | |||
| Counties | Weakley, Obion | |||
| Highway system | ||||
| ||||
State Route 431 (SR 431) is a 16.58-mile-long (26.68 km) secondary state highway in the northwestern part of the U.S. state of Tennessee.