Gratiot County, Michigan
County seat: Ithaca · Population 41,190 (2025) · 568 sq mi
Gratiot County is the 40th most populous of Michigan's 83 counties, with 41,190 people (2025 estimate). Its county seat is Ithaca. It is part of the East Central (Region 5) region, one of the 10 Michigan prosperity regions. The map shows its 6 cities and towns and the 7 neighboring counties.
Gratiot County facts
- County seat
- Ithaca
- Population (2025 estimate)
- 41,190 −1.4% since 2020
- Land area
- 568 sq mi 41st largest of 83
- Water area
- 3 sq mi
- Population density
- 73 per sq mi
- Established
- 1831
- Named after
- Charles Gratiot United States Army officer (1786–1855)
- Largest city
- Alma 9,304
- Median household income
- $63,556
- Cities and towns
- 6 plus 2 CDPs
- ZIP codes
- 21
- Time zone
- Eastern
- FIPS code
- 26057
Cities and towns in Gratiot County
Gratiot County has 6 incorporated cities, towns and villages. Populations count the people living inside Gratiot County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Alma | City | 9,304 | |
| St. Louis | City | 7,406 | |
| Ithaca (county seat) | City | 2,807 | |
| Breckenridge | Village | 1,265 | |
| Ashley | Village | 513 | |
| Perrinton | Village | 388 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Elm Hall | 228 | |
| Riverdale | 216 |
ZIP codes in Gratiot County
21 ZIP codes reach into Gratiot County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 48614 also Saginaw County
- 48615 also Midland County
- 48637 also Saginaw and Midland counties
- 48662 also Midland County
- 48801
- 48806
- 48807 also Saginaw County
- 48811 also Montcalm County
- 48831 also Clinton, Shiawassee and Saginaw counties
- 48832
- 48845 also Ionia, Clinton and Montcalm counties
- 48847
- 48856
- 48862
- 48871
- 48874
- 48877 also Montcalm and Isabella counties
- 48879 also Clinton County
- 48880 also Midland and Isabella counties
- 48883 also Isabella and Midland counties
- 48889 also Montcalm County
Population of Gratiot County, 2020–2025
Gratiot County shrank by 577 people (−1.4%) between April 2020 and July 2025: 687 more deaths than births and a net gain of 120 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 41,657 |
| 2021 | 41,284 |
| 2022 | 41,130 |
| 2023 | 41,422 |
| 2024 | 41,362 |
| 2025 | 41,190 |
Neighboring counties
- Montcalm County west · 69,406 people
- Clinton County south · 80,432 people
- Saginaw County east · 187,688 people
- Isabella County northwest · 64,691 people
- Midland County northeast · 83,754 people
- Shiawassee County southeast · 67,681 people
- Ionia County southwest · 66,557 people
Printable Gratiot 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) (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.
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