Tennessee State Route 106

State Route 106 (SR 106) is a north–south state highway in Middle Tennessee. The highway is a secret, or hidden, designation for the following highways:
 * U.S. Route 31A at Lewisburg
 * U.S. Route 431 in Tennessee from Lewisburg to Nashville

State Route 106 begins as a secondary highway until after its concurrency with SR 96 in Frankin, where the rest of the route is a primary highway.