Sumner County, Tennessee
County seat: Gallatin · Population 215,538 (2025) · 530 sq mi
Sumner County is the 8th most populous of Tennessee's 95 counties, with 215,538 people (2025 estimate). Its county seat is Gallatin. It is part of the Middle Tennessee region, one of the 3 Grand Divisions of Tennessee. The map shows its 8 cities and towns and the 7 neighboring counties.
Sumner County facts
- County seat
- Gallatin
- Population (2025 estimate)
- 215,538 +9.8% since 2020
- Land area
- 530 sq mi 32nd largest of 95
- Water area
- 14 sq mi
- Population density
- 407 per sq mi
- Established
- 1786
- Named after
- Jethro Sumner American Continental Army officer (c1733–c1785)
- Largest city
- Hendersonville 64,266
- Median household income
- $90,301
- Cities and towns
- 8 plus 10 CDPs
- ZIP codes
- 10
- Time zone
- Central
- FIPS code
- 47165
Cities and towns in Sumner County
Sumner County has 8 incorporated cities, towns and villages. Populations count the people living inside Sumner County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Hendersonville | City | 64,266 | |
| Gallatin (county seat) | City | 54,590 | |
| Portland | City | 13,614 | Robertson County |
| White House | City | 9,032 | Robertson County |
| Goodlettsville | City | 6,286 | Davidson County |
| Millersville | City | 5,057 | Robertson County |
| Westmoreland | Town | 2,879 | |
| Mitchellville | City | 221 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Shackle Island | 4,404 | |
| Castalian Springs | 678 | |
| Walnut Grove | 575 | |
| Cottontown | 374 | |
| Fairfield | 351 | |
| Bethpage | 289 | |
| Graball | 288 | |
| Oak Grove | 248 | |
| New Deal | 226 | |
| Bransford | 0 |
ZIP codes in Sumner County
10 ZIP codes reach into Sumner County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 37022 also Trousdale and Macon counties
- 37031 also Trousdale County
- 37048 also Robertson County
- 37049 also Robertson County
- 37066
- 37072 also Davidson and Robertson counties
- 37075
- 37148 also Robertson County
- 37186 also Macon County
- 37188 also Robertson County
Population of Sumner County, 2020–2025
Sumner County grew by 19,249 people (+9.8%) between April 2020 and July 2025: 1,096 more births than deaths and a net gain of 18,051 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 197,416 |
| 2021 | 200,578 |
| 2022 | 204,002 |
| 2023 | 208,501 |
| 2024 | 212,181 |
| 2025 | 215,538 |
Neighboring counties
- Wilson County southeast · 175,033 people
- Robertson County west · 80,175 people
- Davidson County southwest · 745,904 people
- Trousdale County east · 12,623 people
- Macon County east · 27,663 people
- Allen County, Kentucky northeast · 22,536 people
- Simpson County, Kentucky north · 20,788 people
Printable Sumner 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) (109 KB)
- PNG (2400 px) (96 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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