Tennessee State Route 21 runs east- west across most of Central Obion County. Near Rives this highway runs north-south to the Kentucky/Tennessee State Line, north of Union City. TN St Rt 21 passes through the following towns in Obion County. Lassiter Corner Hornbeak Troy Mc Cutchen Heights Union City TN St Rt 21 is multi-plexed in Obion County. Tennessee State Route 22, near Lassiter Corner. U.S. Rt. 51, near Troy. Tennessee State Route 3, near Troy. U.S. Rt. 45W, from near Rives to Union City. Tennessee State Route 5, from near Rives to Union City. TN St Rt 21 intersects the following highways in Obion County. Tennessee State Route 22, near Lassiter Corner. Tennessee State Route 183, at Hornbeak. Tennessee State Route 184, at Troy. U.S. Rt. 51, near Troy. Tennessee State Route 3, near Troy. U.S. Rt. 51, near Troy. Tennessee State Route 3, near Troy. U.S. Rt. 45W, near Rives. Tennessee State Route 5, near Rives. Tennessee State Route 216, near Rives. U.S. Rt. 45W, at Union City. Tennessee State Route 22, at Union City. Tennessee State Route 184, at Union City. Tennessee State Route 5, at Union City. Tennessee State Route 214, at Union City. U.S. Rt. 51, at Union City. Tennessee State Route 3, at Union City.
A junction marker in Union City. A guide marker on NB U.S. Rt. 51.
