Sullivan County, Indiana
County seat: Sullivan · Population 20,831 (2025) · 447 sq mi
Sullivan County is the 69th most populous of Indiana's 92 counties, with 20,831 people (2025 estimate). Its county seat is Sullivan. It is part of the Western (Region 7) region, one of the 12 Indiana economic growth regions (DWD / WorkOne regions). The map shows its 7 cities and towns and the 6 neighboring counties.
Sullivan County facts
- County seat
- Sullivan
- Population (2025 estimate)
- 20,831 +0.1% since 2020
- Land area
- 447 sq mi 21st largest of 92
- Water area
- 7 sq mi
- Population density
- 47 per sq mi
- Established
- 1816
- Named after
- Daniel Sullivan 18th-century military figure in the North American frontier
- Largest city
- Sullivan 4,229
- Median household income
- $56,204
- Cities and towns
- 7 plus 7 CDPs
- ZIP codes
- 13
- Time zone
- Eastern
- FIPS code
- 18153
Cities and towns in Sullivan County
Sullivan County has 7 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 |
|---|---|---|---|
| Sullivan (county seat) | City | 4,229 | |
| Shelburn | Town | 1,103 | |
| Farmersburg | Town | 1,067 | |
| Dugger | Town | 797 | |
| Hymera | Town | 665 | |
| Carlisle | Town | 621 | |
| Merom | Town | 210 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| New Lebanon | 281 | |
| Paxton | 269 | |
| Fairbanks | 147 | |
| Pleasantville | 127 | |
| Graysville | 67 | |
| Cass | 65 | |
| Lewis | 0 | Vigo County |
ZIP codes in Sullivan County
13 ZIP codes reach into Sullivan County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 47438 also Greene and Clay counties
- 47561 also Knox County
- 47838
- 47848 also Greene County
- 47849
- 47850 also Vigo County
- 47855
- 47858 also Clay and Vigo counties
- 47861
- 47865
- 47866 also Vigo County
- 47879 also Clay County
- 47882
Population of Sullivan County, 2020–2025
Sullivan County grew by 12 people (+0.1%) between April 2020 and July 2025: 269 more deaths than births and a net gain of 271 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 20,820 |
| 2021 | 20,783 |
| 2022 | 20,664 |
| 2023 | 20,714 |
| 2024 | 20,693 |
| 2025 | 20,831 |
Neighboring counties
- Crawford County, Illinois west · 18,648 people
- Vigo County north · 106,512 people
- Greene County east · 31,165 people
- Knox County south · 35,652 people
- Clark County, Illinois northwest · 15,114 people
- Clay County northeast · 26,410 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) (81 KB)
- PNG (2400 px) (77 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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