Blackford County, Indiana
County seat: Hartford City · Population 11,730 (2025) · 165 sq mi
Blackford County is the 85th most populous of Indiana's 92 counties, with 11,730 people (2025 estimate). Its county seat is Hartford City. It is part of the Eastern (Region 6) region, one of the 12 Indiana economic growth regions (DWD / WorkOne regions). The map shows its 4 cities and towns and the 4 neighboring counties.
Blackford County facts
- County seat
- Hartford City
- Population (2025 estimate)
- 11,730 −3.1% since 2020
- Land area
- 165 sq mi 89th largest of 92
- Water area
- 1 sq mi
- Population density
- 71 per sq mi
- Established
- 1838
- Named after
- Isaac Blackford Second Chief Justice of the Indiana Supreme Court
- Largest city
- Hartford City 5,898
- Median household income
- $51,326
- Cities and towns
- 4 plus 2 CDPs
- ZIP codes
- 7
- Time zone
- Eastern
- FIPS code
- 18009
Cities and towns in Blackford County
Blackford County has 4 incorporated cities, towns and villages. Populations count the people living inside Blackford County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Hartford City (county seat) | City | 5,898 | |
| Montpelier | City | 1,489 | |
| Shamrock Lakes | Town | 215 | |
| Dunkirk | City | 128 | Jay County |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Roll | 169 | |
| Millgrove | 69 |
ZIP codes in Blackford County
7 ZIP codes reach into Blackford County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 46952 also Grant, Wells and Huntington counties
- 46989 also Grant and Delaware counties
- 47336 also Jay and Delaware counties
- 47338 also Delaware County
- 47348 also Grant County
- 47359 also Wells County
- 47369 also Jay County
Population of Blackford County, 2020–2025
Blackford County shrank by 380 people (−3.1%) between April 2020 and July 2025: 384 more deaths than births and a net gain of 1 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 12,108 |
| 2021 | 12,047 |
| 2022 | 11,902 |
| 2023 | 11,881 |
| 2024 | 11,822 |
| 2025 | 11,730 |
Neighboring counties
- Jay County east · 20,118 people
- Grant County west · 66,524 people
- Wells County north · 28,883 people
- Delaware County south · 113,106 people
Printable Blackford 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) (65 KB)
- PNG (2400 px) (58 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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