Loudon County, Tennessee
County seat: Loudon · Population 63,764 (2025) · 229 sq mi
Loudon County is the 23rd most populous of Tennessee's 95 counties, with 63,764 people (2025 estimate). Its county seat is Loudon. It is part of the East Tennessee region, one of the 3 Grand Divisions of Tennessee. The map shows its 5 cities and towns and the 5 neighboring counties.
Loudon County facts
- County seat
- Loudon
- Population (2025 estimate)
- 63,764 +16.2% since 2020
- Land area
- 229 sq mi 85th largest of 95
- Water area
- 18 sq mi
- Population density
- 278 per sq mi
- Established
- 1870
- Named after
- Fort Loudoun British colonial-era fort in Monroe County, Tennessee, United States
- Largest city
- Lenoir City 12,530
- Median household income
- $84,185
- Cities and towns
- 5 plus 2 CDPs
- ZIP codes
- 9
- Time zone
- Eastern
- FIPS code
- 47105
Cities and towns in Loudon County
Loudon County has 5 incorporated cities, towns and villages. Populations count the people living inside Loudon County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Lenoir City | City | 12,530 | |
| Loudon (county seat) | City | 6,963 | |
| Greenback | City | 1,251 | |
| Philadelphia | City | 704 | |
| Farragut | Town | 0 | Knox County |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Tellico Village | 7,414 | |
| Rarity Bay | 240 | Monroe County |
ZIP codes in Loudon County
9 ZIP codes reach into Loudon County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 37737 also Blount County
- 37742 also Blount County
- 37771 also Roane County
- 37772 also Knox County
- 37774 also Roane and Monroe counties
- 37846 also Roane, Monroe, McMinn and Meigs counties
- 37874 also Monroe, McMinn and Roane counties
- 37885 also Monroe County
- 37922 also Knox County
Population of Loudon County, 2020–2025
Loudon County grew by 8,875 people (+16.2%) between April 2020 and July 2025: 1,169 more deaths than births and a net gain of 9,998 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 55,144 |
| 2021 | 56,833 |
| 2022 | 58,286 |
| 2023 | 60,699 |
| 2024 | 62,642 |
| 2025 | 63,764 |
Neighboring counties
- Monroe County south · 49,730 people
- Roane County northwest · 57,395 people
- Blount County east · 143,820 people
- McMinn County southwest · 57,404 people
- Knox County northeast · 511,453 people
Printable Loudon 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) (84 KB)
- PNG (2400 px) (83 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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