State Route 68 (SR 68) is a 106.89-mile-long (172.02 km) state highway in the eastern part of the U.S. state of Tennessee.

Monroe County is a county located on the eastern border of the U.S. state of Tennessee. As of the 2020 census, the population was 46,250. Its county seat is Madisonville, and its largest city is Sweetwater.