Sullivan County, Tennessee
County seat: Blountville · Population 163,759 (2025) · 414 sq mi
Sullivan County is the 10th most populous of Tennessee's 95 counties, with 163,759 people (2025 estimate). Its county seat is Blountville. It is part of the East Tennessee region, one of the 3 Grand Divisions of Tennessee. The map shows its 4 cities and towns and the 7 neighboring counties.
Sullivan County facts
- County seat
- Blountville
- Population (2025 estimate)
- 163,759 +3.6% since 2020
- Land area
- 414 sq mi 56th largest of 95
- Water area
- 16 sq mi
- Population density
- 396 per sq mi
- Established
- 1779
- Same name
- One of 6 Sullivan Counties in the US
- Named after
- John Sullivan American general, politician and judge from New Hampshire (1740-1795)
- Largest city
- Kingsport 54,660 in the county
- Median household income
- $58,807
- Cities and towns
- 4 plus 7 CDPs
- ZIP codes
- 12
- Time zone
- Eastern
- FIPS code
- 47163
Cities and towns in Sullivan County
Sullivan County has 4 incorporated cities, towns and villages. Populations count the people living inside Sullivan County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Kingsport | City | 54,660 | Hawkins County |
| Bristol | City | 28,107 | |
| Bluff City | City | 1,836 | |
| Johnson City | City | 889 | Carter and Washington counties |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Bloomingdale | 9,292 | |
| Blountville | 3,309 | |
| Colonial Heights | 3,258 | |
| Walnut Hill | 2,415 | |
| Spurgeon | 1,554 | Washington County |
| Sullivan Gardens | 1,267 | |
| Orebank | 816 |
ZIP codes in Sullivan County
12 ZIP codes reach into Sullivan County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 37617
- 37618
- 37620
- 37656 also Washington and Greene counties
- 37659 also Washington County
- 37660 also Hawkins County
- 37663 also Washington County
- 37664
- 37665
- 37686 also Washington County
- 37694 also Carter and Washington counties
- 37857 also Hawkins County
Population of Sullivan County, 2020–2025
Sullivan County grew by 5,613 people (+3.6%) between April 2020 and July 2025: 5,425 more deaths than births and a net gain of 10,940 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 158,238 |
| 2021 | 159,250 |
| 2022 | 160,899 |
| 2023 | 161,953 |
| 2024 | 162,709 |
| 2025 | 163,759 |
Neighboring counties
- Washington County southwest · 141,199 people
- Carter County southeast · 57,361 people
- Washington County, Virginia northeast · 53,898 people
- Hawkins County west · 59,559 people
- Scott County, Virginia northwest · 21,200 people
- Johnson County east · 18,718 people
- Bristol city, Virginia northeast · 16,418 people
Printable Sullivan 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) (133 KB)
- PNG (2400 px) (99 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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