Dover is a city in and the county seat of Stewart County, Tennessee, 67 miles west-northwest of Nashville on the Cumberland River. Fort Don…Dover is a city in and the county seat of Stewart County, Tennessee, 67 miles west-northwest of Nashville on the Cumberland River. Fort Donelson National Cemetery is in Dover. The population was 1,442 at the 2000 census and the 2010 census showed a population of 1,417.