Humphreys County is a county located in the western part of Middle Tennessee, in the U.S. state of Tennessee. As of the 2020 census, the population was 18,990. Its county seat is Waverly.

Benton County is a county located in the U.S. state of Tennessee. As of the 2020 census, the population was 15,864. Its county seat is Camden. The county was created in December 1835 and organized in 1836.