St. Joseph County, Indiana
County seat: South Bend · Population 272,861 (2025) · 458 sq mi
St. Joseph County is the 5th most populous of Indiana's 92 counties, with 272,861 people (2025 estimate). Its county seat is South Bend. It is part of the Northern (Region 2) region, one of the 12 Indiana economic growth regions (DWD / WorkOne regions). The map shows its 9 cities and towns and the 6 neighboring counties.
St. Joseph County facts
- County seat
- South Bend
- Population (2025 estimate)
- 272,861 −0% since 2020
- Land area
- 458 sq mi 17th largest of 92
- Water area
- 4 sq mi
- Population density
- 596 per sq mi
- Established
- 1830
- Named after
- St. Joseph River tributary of Lake Michigan in Michigan and Indiana
- Largest city
- South Bend 103,201
- Median household income
- $66,868
- Cities and towns
- 9 plus 6 CDPs
- ZIP codes
- 25
- Time zone
- Eastern
- FIPS code
- 18141
Cities and towns in St. Joseph County
St. Joseph County has 9 incorporated cities, towns and villages. Populations count the people living inside St. Joseph County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| South Bend (county seat) | City | 103,201 | |
| Mishawaka | City | 51,226 | |
| Osceola | Town | 2,586 | |
| Walkerton | Town | 2,074 | |
| New Carlisle | Town | 1,884 | |
| North Liberty | Town | 1,624 | |
| Lakeville | Town | 873 | |
| Roseland | Town | 850 | |
| Indian Village | Town | 117 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Granger | 30,321 | |
| Notre Dame | 6,890 | |
| Ardmore | 1,810 | |
| Gilmer Park | 1,055 | |
| Chain-O-Lakes | 490 | |
| Wyatt | 80 |
ZIP codes in St. Joseph County
25 ZIP codes reach into St. Joseph County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 46506 also Marshall and Kosciusko counties
- 46530 also Elkhart County
- 46536 also Marshall County
- 46544
- 46545
- 46550 also Elkhart, Kosciusko and Marshall counties
- 46552 also LaPorte County
- 46554 also LaPorte County
- 46556
- 46561 also Elkhart County
- 46563 also Marshall and Starke counties
- 46573 also Elkhart County
- 46574 also LaPorte, Marshall and Starke counties
- 46595
- 46601
- 46613
- 46614
- 46615
- 46616
- 46617
- 46619
- 46624
- 46628
- 46635
- 46637
Population of St. Joseph County, 2020–2025
St. Joseph County shrank by 49 people (−0%) between April 2020 and July 2025: 555 more births than deaths and a net loss of 681 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 272,686 |
| 2021 | 272,235 |
| 2022 | 272,478 |
| 2023 | 273,119 |
| 2024 | 272,936 |
| 2025 | 272,861 |
Neighboring counties
- LaPorte County west · 111,294 people
- Marshall County south · 46,599 people
- Elkhart County east · 208,774 people
- Berrien County, Michigan northwest · 152,444 people
- Cass County, Michigan northeast · 51,677 people
- Starke County southwest · 23,425 people
Printable St. Joseph 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) (69 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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