Cass County, Michigan
County seat: Cassopolis · Population 51,677 (2025) · 490 sq mi
Cass County is the 35th most populous of Michigan's 83 counties, with 51,677 people (2025 estimate). Its county seat is Cassopolis. It is part of the Southwest (Region 8) region, one of the 10 Michigan prosperity regions. The map shows its 6 cities and towns and the 6 neighboring counties.
Cass County facts
- County seat
- Cassopolis
- Population (2025 estimate)
- 51,677 +0.2% since 2020
- Land area
- 490 sq mi 74th largest of 83
- Water area
- 18 sq mi
- Population density
- 105 per sq mi
- Established
- 1829
- Same name
- One of 9 Cass Counties in the US
- Named after
- Lewis Cass American politician (1782-1866)
- Largest city
- Ontwa 6,839
- Median household income
- $70,443
- Cities and towns
- 6
- ZIP codes
- 14
- Time zone
- Eastern
- FIPS code
- 26027
Cities and towns in Cass County
Cass County has 6 incorporated cities, towns and villages. Populations count the people living inside Cass County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Dowagiac | City | 5,725 | |
| Cassopolis (county seat) | Village | 1,707 | |
| Edwardsburg | Village | 1,286 | |
| Marcellus | Village | 1,045 | |
| Vandalia | Village | 327 | |
| Niles | City | 0 | Berrien County |
ZIP codes in Cass County
14 ZIP codes reach into Cass County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 49031
- 49042 also St. Joseph County
- 49045 also Van Buren County
- 49047 also Van Buren and Berrien counties
- 49061
- 49067 also St. Joseph and Van Buren counties
- 49093 also St. Joseph County
- 49095
- 49099 also St. Joseph County
- 49102 also Berrien County
- 49111 also Berrien County
- 49112
- 49120 also Berrien County
- 49130
Population of Cass County, 2020–2025
Cass County grew by 89 people (+0.2%) between April 2020 and July 2025: 815 more deaths than births and a net gain of 902 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 51,553 |
| 2021 | 51,539 |
| 2022 | 51,422 |
| 2023 | 51,570 |
| 2024 | 51,533 |
| 2025 | 51,677 |
Neighboring counties
- Van Buren County northwest · 76,071 people
- St. Joseph County east · 60,968 people
- Berrien County west · 152,444 people
- Elkhart County, Indiana south · 208,774 people
- St. Joseph County, Indiana southwest · 272,861 people
- Kalamazoo County northeast · 263,795 people
Printable Cass 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) (141 KB)
- PNG (2400 px) (65 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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