Union County, Indiana
County seat: Liberty · Population 6,863 (2025) · 161 sq mi
Union County is the 91st most populous of Indiana's 92 counties, with 6,863 people (2025 estimate). Its county seat is Liberty. It is part of the Eastern (Region 6) region, one of the 12 Indiana economic growth regions (DWD / WorkOne regions). The map shows its 2 cities and towns and the 5 neighboring counties.
Union County facts
- County seat
- Liberty
- Population (2025 estimate)
- 6,863 −3.2% since 2020
- Land area
- 161 sq mi 90th largest of 92
- Water area
- 4 sq mi
- Population density
- 43 per sq mi
- Established
- 1821
- Named after
- union entity resulting from the act of combining several entities to form one; effect of the action of joining or uniting
- Largest city
- Liberty 1,967
- Median household income
- $76,424
- Cities and towns
- 2 plus 1 CDPs
- ZIP codes
- 6
- Time zone
- Eastern
- FIPS code
- 18161
Cities and towns in Union County
Union County has 2 incorporated cities, towns and villages. Populations count the people living inside Union County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Liberty (county seat) | Town | 1,967 | |
| West College Corner | Town | 511 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Brownsville | 222 |
ZIP codes in Union County
6 ZIP codes reach into Union County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 47003 also Franklin County
- 47010 also Franklin County
- 47325 also Fayette and Wayne counties
- 47331 also Fayette, Franklin and Wayne counties
- 47353 also Franklin County
- 47374 also Wayne County
Population of Union County, 2020–2025
Union County shrank by 227 people (−3.2%) between April 2020 and July 2025: 136 more deaths than births and a net loss of 91 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 7,085 |
| 2021 | 7,022 |
| 2022 | 6,982 |
| 2023 | 6,989 |
| 2024 | 6,934 |
| 2025 | 6,863 |
Neighboring counties
- Fayette County west · 23,533 people
- Wayne County north · 66,169 people
- Franklin County southwest · 23,286 people
- Preble County, Ohio northeast · 40,664 people
- Butler County, Ohio southeast · 400,128 people
Printable Union 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) (67 KB)
- PNG (2400 px) (58 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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