Smithville, Tennessee, the county seat of DeKalb County, is world renowned for its annual Fiddlers' Jamboree and Craft Festival, held on the first weekend in July. DeKalb County is the home of Center Hill Lake, a 64 mile long reservoir with 415 miles of largely undeveloped shoreline and 18,200 acres of deep, pure water. A 2005 real estate survey has estimated the population of Smithville, Tennessee at 3,994.