Grant County, Indiana
County seat: Marion · Population 66,524 (2025) · 414 sq mi
Grant County is the 26th most populous of Indiana's 92 counties, with 66,524 people (2025 estimate). Its county seat is Marion. It is part of the Northeast (Region 3) region, one of the 12 Indiana economic growth regions (DWD / WorkOne regions). The map shows its 11 cities and towns and the 9 neighboring counties.
Grant County facts
- County seat
- Marion
- Population (2025 estimate)
- 66,524 −0.2% since 2020
- Land area
- 414 sq mi 30th largest of 92
- Water area
- 1 sq mi
- Population density
- 161 per sq mi
- Established
- 1831
- Named after
- Moses Grant, Samuel Grant
- Largest city
- Marion 28,234
- Median household income
- $53,522
- Cities and towns
- 11 plus 6 CDPs
- ZIP codes
- 15
- Time zone
- Eastern
- FIPS code
- 18053
Cities and towns in Grant County
Grant County has 11 incorporated cities, towns and villages. Populations count the people living inside Grant County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Marion (county seat) | City | 28,234 | |
| Gas City | City | 6,081 | |
| Upland | Town | 3,835 | |
| Fairmount | Town | 2,670 | |
| Jonesboro | City | 1,510 | |
| Sweetser | Town | 1,069 | |
| Swayzee | Town | 904 | |
| Van Buren | Town | 775 | |
| Matthews | Town | 484 | |
| Fowlerton | Town | 271 | |
| Converse | Town | 252 | Miami County |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Herbst | 309 | |
| Mier | 210 | |
| Sims | 98 | |
| Point Isabel | 60 | |
| Jalapa | 52 | |
| Landess | 22 |
ZIP codes in Grant County
15 ZIP codes reach into Grant County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 46036 also Madison and Tipton counties
- 46919 also Miami and Howard counties
- 46928 also Madison and Howard counties
- 46930
- 46933
- 46938
- 46940 also Wabash and Huntington counties
- 46952 also Wells, Huntington and Blackford counties
- 46953
- 46957
- 46986
- 46987
- 46989 also Delaware and Blackford counties
- 46991 also Huntington and Wells counties
- 47348 also Blackford County
Population of Grant County, 2020–2025
Grant County shrank by 148 people (−0.2%) between April 2020 and July 2025: 1,635 more deaths than births and a net gain of 1,492 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 66,505 |
| 2021 | 66,152 |
| 2022 | 65,900 |
| 2023 | 66,188 |
| 2024 | 66,236 |
| 2025 | 66,524 |
Neighboring counties
- Madison County south · 135,088 people
- Blackford County east · 11,730 people
- Wabash County north · 30,713 people
- Howard County west · 83,904 people
- Huntington County northeast · 37,224 people
- Delaware County southeast · 113,106 people
- Wells County northeast · 28,883 people
- Miami County northwest · 34,487 people
- Tipton County southwest · 15,319 people
Printable Grant 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) (98 KB)
- PNG (2400 px) (68 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.
Back to the Indiana county map with all 92 counties. Found an error? Tell us.