Rhea County, Tennessee
County seat: Dayton · Population 34,844 (2025) · 316 sq mi
Rhea County is the 45th most populous of Tennessee's 95 counties, with 34,844 people (2025 estimate). Its county seat is Dayton. It is part of the East Tennessee region, one of the 3 Grand Divisions of Tennessee. The map shows its 3 cities and towns and the 5 neighboring counties.
Rhea County facts
- County seat
- Dayton
- Population (2025 estimate)
- 34,844 +4.8% since 2020
- Land area
- 316 sq mi 69th largest of 95
- Water area
- 21 sq mi
- Population density
- 110 per sq mi
- Established
- 1807
- Named after
- John Rhea American politician (1753-1832)
- Largest city
- Dayton 7,819
- Median household income
- $55,033
- Cities and towns
- 3
- ZIP codes
- 6
- Time zone
- Eastern
- FIPS code
- 47143
Cities and towns in Rhea County
Rhea County has 3 incorporated cities, towns and villages. Populations count the people living inside Rhea County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Dayton (county seat) | City | 7,819 | |
| Spring City | Town | 1,989 | |
| Graysville | Town | 1,506 |
ZIP codes in Rhea County
6 ZIP codes reach into Rhea County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 37321 also Bledsoe County
- 37332 also Bledsoe County
- 37337 also Cumberland and Bledsoe counties
- 37338 also Bledsoe, Sequatchie and Hamilton counties
- 37373 also Hamilton County
- 37381 also Bledsoe County
Population of Rhea County, 2020–2025
Rhea County grew by 1,609 people (+4.8%) between April 2020 and July 2025: 808 more deaths than births and a net gain of 2,362 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 33,302 |
| 2021 | 33,508 |
| 2022 | 33,999 |
| 2023 | 34,264 |
| 2024 | 34,716 |
| 2025 | 34,844 |
Neighboring counties
- Meigs County southeast · 14,186 people
- Bledsoe County west · 15,920 people
- Hamilton County southwest · 390,833 people
- Roane County northeast · 57,395 people
- Cumberland County north · 66,300 people
Printable Rhea 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) (79 KB)
- PNG (2400 px) (93 KB)
Paste this code to embed the map on your site:
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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