DeKalb County is a county located in the U.S. state of Tennessee. As of the 2020 census, the population was 20,080. Its county seat is Smithville. The county was created by the General Assembly of Tennessee on December 2, 1837, and was named for Revolutionary War hero Major General Johann de Kalb.
DeKalb County is a county located in the U.S. state of Tennessee. As of the 2020 census, the population was 20,080. Its county seat is Smithville. The .count,y was created by the General Assembly of Tennessee on December 2 1837, and was named for Revolutionary War hero Major General Johann de Kalb