Allegan County, Michigan Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 18th-largest in Michigan
The population of Allegan County, Michigan is 120,913 as of the 2023 American Community Survey, making it the 18th-largest county in Michigan. The median household income is $80,255, the median home value is $247,000, and the median age is 40.8.
The population of Allegan County has grown 9.8% since 2010 (111,521 → 122,429), a +0.67% annualized rate.
120,913
Population
+0.67%
Annual growth
147
People / sq mi
$80,255
Median Income
$247,000
Median Home Value
Allegan County covers 825 sq mi of land at 146.5 people per square mile.
About Allegan County, MI
Allegan County is a county in Michigan with a population of 120,913. It ranks #18 among counties in Michigan by population. The median age is 40.8, older than the national median. The population is 50.2% male and 49.8% female.
The median household income in Allegan County is $80,255, above the US median of $74,580. 6.3% of residents live below the federal poverty level. Home values sit at a median of $247,000, with monthly rent averaging $1,065. The homeownership rate of 86.1% is higher than the national rate of 64.8%.
Educational attainment in Allegan County reflects 26.1% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 9.0% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 23.9 minutes each way.
Allegan County Population History (2010-2024)
The county of Allegan County had a population of 111,521 in 2010 and 122,429 in 2024, a 9.8% growth over 14 years. The peak was 122,429 in 2024. Average annual growth rate: 0.67%.
122,429
Population (2024)
111,521
Population (2010)
122,429
Peak (2024)
0.67%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 111,521 |
| 2011 | 111,167 |
| 2012 | 111,506 |
| 2013 | 112,020 |
| 2014 | 113,361 |
| 2015 | 114,122 |
| 2016 | 115,018 |
| 2017 | 116,393 |
| 2018 | 117,137 |
| 2019 | 118,045 |
| 2020 | 120,661 |
| 2021 | 121,055 |
| 2022 | 121,262 |
| 2023 | 121,874 |
| 2024 | 122,429 |
Race & Ethnicity
| White | 89.3% |
| Black or African American | 1.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.5% |
| Two or More Races | 0.0% |
Age & Sex
40.8
Median Age
49.8%
Female
50.2%
Male
17.8%
Age 65+
Age Distribution
Children (under 15): 19.3% · Seniors (65+): 17.8%
Income & Poverty
| Median household income | $80,255+$9,106 vs state |
| Mean household income | $99,705 |
| Per-capita income | $37,565 |
| Poverty rate | 6.3%-2.5% vs state |
| Unemployment rate | 1.9% |
| Employment-to-population | 60.0% |
Top Industries by Employment
The largest employment sector in Allegan County is manufacturing, accounting for 24.8% of workers.
How residents commute
0.3%
Drive alone
1.7%
Carpool
79.6%
Public transit
9.0%
Work from home
23.9 min
Avg commute
Housing
$247,000+$29,400 vs state
Median home value
$1,065
Median rent
86.1%
Homeownership rate
52,262
Total housing units
86.1%
Occupied
13.9%
Vacant
13.9%
Renter-occupied
Social & access
94.9%
With health insurance
94.8%
With broadband internet
16.0%
Foreign-born
5.2%
Veterans (18+)
11.2%
With a disability
93.3%
Speak language other than English at home
Education
92.1%
High School+
26.1%
Bachelor's+
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County rankings
Frequently Asked Questions
Allegan County, Michigan has a population of 120,913 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 18th-largest county in Michigan. Population density is 147 people per square mile.
The population of Allegan County has grown 9.8% since 2010 (111,521 → 122,429), a +0.67% annualized rate.
The median household income in Allegan County, Michigan is $80,255, with mean (average) household income of $99,705 and per-capita income of $37,565. 6.3% of residents live below the federal poverty level.
In Allegan County, the largest racial and ethnic groups are White (89.3%), Hispanic or Latino (1.5%), Black or African American (1.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Allegan County, Michigan is 40.8 years. Residents are 49.8% female and 50.2% male.
The median home value in Allegan County is $247,000 and median monthly rent is $1,065. 86.1% of occupied housing units are owner-occupied. The county has 52,262 total housing units, 13.9% of which are vacant.
The largest employment sector in Allegan County, Michigan is manufacturing, employing 24.8% of workers. The unemployment rate is 1.9%.
Detroit is among the largest cities associated with Allegan County, Michigan, with a population of 636,644.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.