County · Tennessee

Knox County

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.

Governance bodies

County Commission Primary
governing council

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Cities and towns 2

Reference data (Census of Governments 2022)

Census ID (PID6): 175683
FIPS state: 47
FIPS county: 093
FIPS place: 99093
Census record name: COUNTY OF KNOX
Mailing address: 400 W MAIN ST, KNOXVILLE 37902