Knox County

Also known as Knox County, Tennessee, Knox County, TN

county in Tennessee, United States

Key facts

Country: United States
State: Tennessee
Founded: June 15, 1792
Named after: Henry Knox
Seat: Knoxville
Largest city: Knoxville
Mayor: Glenn Jacobs ( R )
Total: 526 sq mi (1,360 km )
Land: 508 sq mi (1,320 km )
Water: 18 sq mi (47 km ) 3.5%
Estimate 2025: 511,453
Density: 943/sq mi (364/km )
Congressional district: 2nd
Website: knoxcounty .org

via Wikipedia infobox

Wikidata facts

Population: 478971
Area: 1362
Official website: knoxcounty.org
Image: Oldknoxcourthouse.JPG
Households: 189536

Show 7 more facts

water as percent of area: 3.5
native label: Knox County
Commons category: Knox County, Tennessee
inception: 1792-06-11
social media followers: 13071
per capita income: 34338
P8168: Johann Georg Tralles

Sources (10)

via Wikidata · CC0

~20 min read

Article

Knox County is a county located in the U.S. state of Tennessee. The population was 511,453 as of a 2025 estimate, making it the third-most populous county in Tennessee. Its county seat is Knoxville, which is the third-most populous city in Tennessee. Knox County is included in the Knoxville metropolitan area. The county is located at the geographical center of the Great Valley of East Tennessee. Near the heart of the county is the origin of the Tennessee River, at the confluence of the Holston and French Broad rivers.

History