St. Joseph County, Michigan
County seat: Centreville · Population 60,968 (2025) · 501 sq mi
St. Joseph County is the 33rd most populous of Michigan's 83 counties, with 60,968 people (2025 estimate). Its county seat is Centreville. It is part of the Southwest (Region 8) region, one of the 10 Michigan prosperity regions. The map shows its 8 cities and towns and the 7 neighboring counties.
St. Joseph County facts
- County seat
- Centreville
- Population (2025 estimate)
- 60,968 +0.1% since 2020
- Land area
- 501 sq mi 72nd largest of 83
- Water area
- 20 sq mi
- Population density
- 122 per sq mi
- Established
- 1829
- Named after
- St. Joseph River tributary of Lake Michigan in Michigan and Indiana
- Largest city
- Sturgis 10,900
- Median household income
- $66,425
- Cities and towns
- 8
- ZIP codes
- 13
- Time zone
- Eastern
- FIPS code
- 26149
Cities and towns in St. Joseph County
St. Joseph County has 8 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 |
|---|---|---|---|
| Sturgis | City | 10,900 | |
| Three Rivers | City | 7,910 | |
| Constantine | Village | 1,983 | |
| White Pigeon | Village | 1,824 | |
| Centreville (county seat) | Village | 1,374 | |
| Colon | Village | 1,182 | |
| Mendon | Village | 862 | |
| Burr Oak | Village | 755 |
ZIP codes in St. Joseph County
13 ZIP codes reach into St. Joseph County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 49011 also Calhoun and Branch counties
- 49030 also Branch County
- 49032
- 49040 also Branch County
- 49042 also Cass County
- 49066
- 49067 also Cass and Van Buren counties
- 49072 also Kalamazoo County
- 49075
- 49091
- 49093 also Cass County
- 49097 also Kalamazoo County
- 49099 also Cass County
Population of St. Joseph County, 2020–2025
St. Joseph County grew by 42 people (+0.1%) between April 2020 and July 2025: 241 more deaths than births and a net gain of 273 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 60,923 |
| 2021 | 60,849 |
| 2022 | 60,777 |
| 2023 | 60,953 |
| 2024 | 61,023 |
| 2025 | 60,968 |
Neighboring counties
- Kalamazoo County north · 263,795 people
- Cass County west · 51,677 people
- Branch County east · 45,993 people
- LaGrange County, Indiana south · 41,305 people
- Elkhart County, Indiana southwest · 208,774 people
- Calhoun County northeast · 133,408 people
- Van Buren County northwest · 76,071 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) (142 KB)
- PNG (2400 px) (67 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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