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
Homeownership is the standout figure in Allegan County: 86.1% of homes are owner-occupied, higher than the national rate. With 120,913 residents, Allegan County is a county in Michigan. It ranks #18 among counties in Michigan by population.
Households take in a median $80,255, comfortably near the US median of $78,538. Only 6.3% of residents live in poverty, below the national 12.4%. A typical home is worth $247,000, with typical rent around $1,065.
26.1% of adults 25 and older hold a bachelor’s degree, below the national average of 35.0%. About 9.0% of the workforce is home-based, below the national 14.0%, and the average commute runs about 24 minutes each way.
The ownership rate anchors the housing story in Allegan County, and tends to move with the age structure and home-value figures above.
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+
Largest cities in Michigan
Other counties in Michigan
Part of Michigan
Metro areas in Michigan
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.
Allegan County, MI Climate
Allegan County, MI has an average annual temperature of 9.5°C (49°F) and receives about 893 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
9.5°C
Avg Temp
893
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -3° / 27° | 53 mm |
| February | -2° / 29° | 35 mm |
| March | 2° / 35° | 55 mm |
| April | 7° / 45° | 85 mm |
| May | 13° / 55° | 80 mm |
| June | 19° / 65° | 83 mm |
| July | 22° / 71° | 85 mm |
| August | 21° / 70° | 89 mm |
| September | 17° / 63° | 102 mm |
| October | 12° / 54° | 71 mm |
| November | 6° / 43° | 81 mm |
| December | 0° / 33° | 74 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Allegan County, MI
The most comfortable months to visit Allegan County, MI are typically August, July and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 27°C high). The coldest is January (near -6°C low). September is usually the wettest month.
Where to stay near Allegan County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.