Knox County, Tennessee
County seat: Knoxville · Population 511,453 (2025) · 508 sq mi
Knox County is the 3rd most populous of Tennessee's 95 counties, with 511,453 people (2025 estimate). Its county seat is Knoxville. It is part of the East Tennessee region, one of the 3 Grand Divisions of Tennessee. The map shows its 2 cities and towns and the 8 neighboring counties.
Knox County facts
- County seat
- Knoxville
- Population (2025 estimate)
- 511,453 +6.8% since 2020
- Land area
- 508 sq mi 36th largest of 95
- Water area
- 18 sq mi
- Population density
- 1,006 per sq mi
- Established
- 1792
- Same name
- One of 9 Knox Counties in the US
- Named after
- Henry Knox American general and Secretary of War (1750–1806)
- Largest city
- Knoxville 202,021
- Median household income
- $74,222
- Cities and towns
- 2 plus 5 CDPs
- ZIP codes
- 31
- Time zone
- Eastern
- FIPS code
- 47093
Cities and towns in Knox County
Knox County has 2 incorporated cities, towns and villages. Populations count the people living inside Knox County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Knoxville (county seat) | City | 202,021 | |
| Farragut | Town | 25,121 | Loudon County |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Powell | 13,739 | |
| Halls | 10,272 | |
| Karns | 4,115 | |
| Mascot | 3,277 | |
| John Sevier | 1,177 |
ZIP codes in Knox County
31 ZIP codes reach into Knox County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 37709 also Grainger County
- 37721 also Union County
- 37754 also Anderson and Union counties
- 37764 also Sevier and Jefferson counties
- 37772 also Loudon County
- 37779 also Union and Grainger counties
- 37806 also Grainger County
- 37807 also Union County
- 37830 also Anderson and Roane counties
- 37849 also Anderson County
- 37853 also Blount County
- 37871 also Jefferson and Sevier counties
- 37902
- 37909
- 37912
- 37914
- 37915
- 37916
- 37917
- 37918
- 37919
- 37920 also Blount and Sevier counties
- 37921
- 37922 also Loudon County
- 37923
- 37924
- 37929
- 37931 also Anderson County
- 37932
- 37934
- 37938 also Union and Anderson counties
Population of Knox County, 2020–2025
Knox County grew by 32,528 people (+6.8%) between April 2020 and July 2025: 870 more deaths than births and a net gain of 32,835 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 480,472 |
| 2021 | 486,009 |
| 2022 | 495,827 |
| 2023 | 501,589 |
| 2024 | 507,597 |
| 2025 | 511,453 |
Neighboring counties
- Anderson County northwest · 82,066 people
- Blount County south · 143,820 people
- Sevier County southeast · 101,342 people
- Union County north · 21,450 people
- Grainger County northeast · 25,739 people
- Loudon County southwest · 63,764 people
- Jefferson County east · 60,024 people
- Roane County west · 57,395 people
Printable Knox County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (111 KB)
- PNG (2400 px) (96 KB)
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Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
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