Isabella County, Michigan
County seat: Mount Pleasant · Population 64,691 (2025) · 573 sq mi
Isabella County is the 31st most populous of Michigan's 83 counties, with 64,691 people (2025 estimate). Its county seat is Mount Pleasant. It is part of the East Central (Region 5) region, one of the 10 Michigan prosperity regions. The map shows its 5 cities and towns and the 7 neighboring counties.
Isabella County facts
- County seat
- Mount Pleasant
- Population (2025 estimate)
- 64,691 +0.5% since 2020
- Land area
- 573 sq mi 38th largest of 83
- Water area
- 5 sq mi
- Population density
- 113 per sq mi
- Established
- 1831
- Named after
- Isabella I of Castile queen of the Crown of Castile, from 1474 to 1504; first queen of a dynastically-united Spain, from 1479 to 1504 (1451–1504)
- Largest city
- Mount Pleasant 20,925
- Median household income
- $55,237
- Cities and towns
- 5 plus 4 CDPs
- ZIP codes
- 16
- Time zone
- Eastern
- FIPS code
- 26073
Cities and towns in Isabella County
Isabella County has 5 incorporated cities, towns and villages. Populations count the people living inside Isabella County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Mount Pleasant (county seat) | City | 20,925 | |
| Lake Isabella | Village | 1,952 | |
| Shepherd | Village | 1,513 | |
| Rosebush | Village | 361 | |
| Clare | City | 73 | Clare County |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Weidman | 1,156 | |
| Beal City | 293 | |
| Winn | 226 | |
| Loomis | 200 |
ZIP codes in Isabella County
16 ZIP codes reach into Isabella County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 48617 also Clare County
- 48618 also Midland and Gladwin counties
- 48622 also Clare County
- 48632 also Clare, Osceola and Mecosta counties
- 48829 also Montcalm County
- 48858 also Midland County
- 48859
- 48877 also Gratiot and Montcalm counties
- 48878
- 48880 also Gratiot and Midland counties
- 48883 also Midland and Gratiot counties
- 48893
- 48896
- 49305 also Mecosta County
- 49310 also Mecosta and Montcalm counties
- 49340 also Mecosta County
Population of Isabella County, 2020–2025
Isabella County grew by 303 people (+0.5%) between April 2020 and July 2025: 164 more deaths than births and a net gain of 472 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 64,518 |
| 2021 | 64,257 |
| 2022 | 64,486 |
| 2023 | 64,390 |
| 2024 | 64,873 |
| 2025 | 64,691 |
Neighboring counties
- Clare County north · 31,543 people
- Midland County east · 83,754 people
- Mecosta County west · 42,320 people
- Montcalm County southwest · 69,406 people
- Gratiot County southeast · 41,190 people
- Gladwin County northeast · 26,077 people
- Osceola County northwest · 23,516 people
Printable Isabella 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) (143 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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