Obion County, Tennessee
County seat: Union City · Population 30,067 (2025) · 545 sq mi
Obion County is the 50th most populous of Tennessee's 95 counties, with 30,067 people (2025 estimate). Its county seat is Union City. It is part of the West Tennessee region, one of the 3 Grand Divisions of Tennessee. The map shows its 10 cities and towns and the 6 neighboring counties.
Obion County facts
- County seat
- Union City
- Population (2025 estimate)
- 30,067 −2.4% since 2020
- Land area
- 545 sq mi 26th largest of 95
- Water area
- 11 sq mi
- Population density
- 55 per sq mi
- Established
- 1823
- Named after
- Obion River river in the United States of America
- Largest city
- Union City 10,814
- Median household income
- $54,613
- Cities and towns
- 10
- ZIP codes
- 12
- Time zone
- Central
- FIPS code
- 47131
Cities and towns in Obion County
Obion County has 10 incorporated cities, towns and villages. Populations count the people living inside Obion County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Union City (county seat) | City | 10,814 | |
| South Fulton | City | 2,158 | |
| Troy | Town | 1,399 | |
| Obion | Town | 958 | |
| Kenton | Town | 519 | Gibson County |
| Hornbeak | Town | 503 | |
| Woodland Mills | City | 334 | |
| Rives | Town | 244 | |
| Samburg | Town | 198 | |
| Trimble | Town | 5 | Dyer County |
ZIP codes in Obion County
12 ZIP codes reach into Obion County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 38080 also Lake and Dyer counties
- 38232
- 38233 also Gibson County
- 38237 also Weakley County
- 38240 also Dyer County
- 38253
- 38254
- 38255 also Weakley County
- 38257 also Weakley County
- 38259 also Dyer and Gibson counties
- 38260
- 38261 also Weakley County
Population of Obion County, 2020–2025
Obion County shrank by 728 people (−2.4%) between April 2020 and July 2025: 834 more deaths than births and a net gain of 109 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 30,779 |
| 2021 | 30,467 |
| 2022 | 30,360 |
| 2023 | 30,402 |
| 2024 | 30,256 |
| 2025 | 30,067 |
Neighboring counties
- Weakley County east · 33,261 people
- Fulton County, Kentucky north · 6,218 people
- Lake County west · 6,249 people
- Dyer County southwest · 36,320 people
- Gibson County southeast · 51,779 people
- Hickman County, Kentucky northeast · 4,372 people
Printable Obion 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) (94 KB)
- PNG (2400 px) (85 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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