Tazewell is a town in Claiborne County, Tennessee, United States. The population was 2,165 at the 2000 census. It is the county seat of Claiborne County. The town is named for Henry Tazewell, a U.S. senator from Virginia. The town is situated on the northern slope of Wallen Ridge, the northernmost of a series of long, narrow ridges that comprise the Ridge and Valley Province of the Appalachian Mountains. Big Barren Creek rises in the western section of Tazewell and flows southwestward for approximately 10 miles (16km) before emptying into the Norris Lake impoundment of the Clinch River. The streams in the eastern section of Tazewell are part of the watershed of the Powell River, a Clinch tributary that flows westward a few miles north of Tazewell.