Tennessee State Route 33
|Maintained by TDOT|
|South end:||US 411 / SR 61 at Georgia state line in Tennga, Georgia|
| US 129 south of Maryville
US 411 in Maryville
US 441 in Knoxville
US 441 in Halls Crossroads
US 25E / SR 32 in Tazewell
SR 66 / SR 31 in Sneedville
SR 70 in Kyles Ford
|North end:||SR 696 at Virginia state line in Hancock County.|
|Counties:||Polk, McMinn, Monroe, Loudon Blount, Knox, Union, Claiborne, Hancock|
State Route 33 (SR-33) is a primary and secondary route in the U.S. state of Tennessee. It runs 176 miles, from the Georgia state line in Polk County, northeast to the Virginia state line north of Kyles Ford in Hancock County. South of Maryville, SR-33 is a "hidden" route which shares a concurrency with US 411.
The section of SR-33 between Knoxville and Tazewell, along with US 25E between Tazewell and Middlesboro, KY, was an inspiration for the song The Ballad of Thunder Road. In the song, a moonshiner runs illegal whiskey from Kentucky to Knoxville on this route. Sections of old highway 33 in Union County have signs marking "The Original Thunder Road".