How many people live in Allegan County, MI?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 122,400 people living in Allegan County, MI. That makes Allegan County the 18th-most populous county in Michigan. It is home to 1.2% of people living in the state.
122K
population of Allegan County, MI (2024)
1.2%
County share of the Michigan population (2024)
About 122,400 people lived in Allegan County, MI in 2024.
Population estimates, 2000–2024
What are Allegan County, MI’s age demographics?
About 24,000 Allegan County residents are aged 65 and older in 2024. That represents 19.6% of its population. For comparison, the age group represents 19.6% of Michigan’s population and 18% in the US overall.
Another 27,400 Allegan County residents, or 22.4% of the population, were children under 18. For comparison, the age group represents 20.8% of Michigan’s population and 21.6% in the US overall.
A lower share of Allegan County, MI's population is aged 25–44 than the US as a whole.
Population estimates by age group, (2024)
What are Allegan County, MI’s racial and ethnic demographics?
Non-Hispanic white residents make up 87% of the Allegan County, MI population, higher than the national share of 57.5%.
In contrast, Allegan County’s Hispanic population accounts for 8.3%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 1.4% of the county, compared with 12.6% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Allegan County, MI has a higher share of a non-Hispanic white population than Michigan as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Allegan County, MI is Dorr with about 7,900 residents in 2024.
Cities and towns in Allegan County, MI ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Dorr | 7,933 |
| 2. | Holland (pt.) | 7,931 |
| 3. | Leighton | 7,255 |
| 4. | Laketown | 6,223 |
| 5. | Gun Plain | 6,161 |
| 6. | Otsego | 5,982 |
| 7. | Salem | 5,183 |
| 8. | Allegan | 5,152 |
| 9. | Allegan | 4,856 |
| 10. | Wayland | 4,543 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
