State Route 146 (SR 146) is a relatively short north–south highway in Middle Tennessee.

It proceeds northward as Short Mountain Road, passing through the community of Center Hill, where it intersects SR 281.

It continues north through farmland along the southeastern edge of the Highland Rim and turns east, then northeast as it moves around Short Mountain.

It continues northward through neighborhoods before entering a business district and coming to its northern terminus at U.S. 70/SR 26 just south of downtown.

[2] A former alignment of SR 146 saw the Cannon County portion extended further south from the current southern terminus by approximately 1,000 feet (300 m).