Allegan County, Michigan
County seat: Allegan · Population 123,188 (2025) · 825 sq mi
Allegan County is the 18th most populous of Michigan's 83 counties, with 123,188 people (2025 estimate). Its county seat is Allegan. It is part of the West (Region 4) region, one of the 10 Michigan prosperity regions. The map shows its 11 cities and towns and the 8 neighboring counties.
Allegan County facts
- County seat
- Allegan
- Population (2025 estimate)
- 123,188 +2.2% since 2020
- Land area
- 825 sq mi 19th largest of 83
- Water area
- 1,008 sq mi
- Population density
- 149 per sq mi
- Established
- 1831
- Largest city
- Holland 8,029 in the county
- Median household income
- $83,283
- Cities and towns
- 11 plus 1 CDPs
- ZIP codes
- 25
- Time zone
- Eastern
- FIPS code
- 26005
Cities and towns in Allegan County
Allegan County has 11 incorporated cities, towns and villages. Populations count the people living inside Allegan County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Holland | City | 8,029 | Ottawa County |
| Allegan (county seat) | City | 5,127 | |
| Wayland | City | 4,531 | |
| Otsego | City | 4,045 | |
| Plainwell | City | 3,722 | |
| Fennville | City | 1,724 | |
| Douglas | City | 1,411 | |
| Saugatuck | City | 882 | |
| Hopkins | Village | 636 | |
| Martin | Village | 395 | |
| South Haven | City | 5 | Van Buren County |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Dorr | 3,702 |
ZIP codes in Allegan County
25 ZIP codes reach into Allegan County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 49010 also Van Buren County
- 49026 also Van Buren County
- 49055 also Van Buren County
- 49056 also Van Buren County
- 49070
- 49078 also Kalamazoo and Van Buren counties
- 49080 also Barry and Kalamazoo counties
- 49090 also Van Buren County
- 49315 also Kent and Ottawa counties
- 49316 also Kent and Barry counties
- 49323 also Ottawa County
- 49328
- 49333 also Barry and Kent counties
- 49335
- 49344 also Barry County
- 49348 also Barry and Kent counties
- 49406
- 49408
- 49419
- 49423 also Ottawa County
- 49426 also Ottawa County
- 49434 also Ottawa County
- 49450
- 49453
- 49464 also Ottawa County
Population of Allegan County, 2020–2025
Allegan County grew by 2,677 people (+2.2%) between April 2020 and July 2025: 8 more births than deaths and a net gain of 2,659 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 120,666 |
| 2021 | 121,082 |
| 2022 | 121,299 |
| 2023 | 121,935 |
| 2024 | 122,567 |
| 2025 | 123,188 |
Neighboring counties
- Van Buren County south · 76,071 people
- Ottawa County north · 308,459 people
- Barry County east · 63,991 people
- Kent County northeast · 675,232 people
- Kenosha County, Wisconsin west · 168,448 people
- Kalamazoo County east · 263,795 people
- Racine County, Wisconsin west · 198,919 people
- Lake County, Illinois west · 719,339 people
Printable Allegan 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) (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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