Ionia County, Michigan Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 29th-largest in Michigan
The population of Ionia County, Michigan is 66,706 as of the 2023 American Community Survey, making it the 29th-largest county in Michigan. The median household income is $73,436, the median home value is $189,400, and the median age is 38.8.
The population of Ionia County has grown 3.8% since 2010 (63,847 → 66,250), a +0.26% annualized rate.
66,706
Population
+0.26%
Annual growth
117
People / sq mi
$73,436
Median Income
$189,400
Median Home Value
Ionia County covers 571 sq mi of land at 116.8 people per square mile.
About Ionia County, MI
Ionia County is distinguished by its share of foreign-born residents, 10.9% of the population. Ionia County is a county in Michigan with a population of 66,706. It ranks #29 among counties in Michigan by population.
The typical household earns $73,436 a year, below the US median of $78,538. About 7.5% of residents live below the federal poverty level, below the national 12.4%. Homes carry a median value of $189,400, with typical rent around $840.
Degree attainment is mid-range for US counties: 18.0% of adults hold a four-year degree, below the national 35.0%. Remote work is below the national 14.0% at 8.3%, and the average commute runs about 27 minutes each way.
Ionia County Population History (2010-2024)
The county of Ionia County had a population of 63,847 in 2010 and 66,250 in 2024, a 3.8% growth over 14 years. The peak was 66,891 in 2020. Average annual growth rate: 0.27%.
66,250
Population (2024)
63,847
Population (2010)
66,891
Peak (2020)
0.27%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 63,847 |
| 2011 | 63,865 |
| 2012 | 63,890 |
| 2013 | 64,001 |
| 2014 | 64,246 |
| 2015 | 64,073 |
| 2016 | 64,215 |
| 2017 | 64,293 |
| 2018 | 64,290 |
| 2019 | 64,654 |
| 2020 | 66,891 |
| 2021 | 66,853 |
| 2022 | 66,774 |
| 2023 | 66,104 |
| 2024 | 66,250 |
Race & Ethnicity
| White | 87.6% |
| Black or African American | 3.8% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 3.0% |
| Two or More Races | 0.0% |
Age & Sex
38.8
Median Age
45.7%
Female
54.3%
Male
15.4%
Age 65+
Age Distribution
Children (under 15): 17.4% · Seniors (65+): 15.4%
Income & Poverty
| Median household income | $73,436+$2,287 vs state |
| Mean household income | $84,553 |
| Per-capita income | $31,593 |
| Poverty rate | 7.5%-1.3% vs state |
| Unemployment rate | 2.9% |
| Employment-to-population | 56.2% |
Top Industries by Employment
The largest employment sector in Ionia County is manufacturing, accounting for 20.9% of workers.
How residents commute
1.4%
Drive alone
2.2%
Carpool
80.1%
Public transit
8.3%
Work from home
27.4 min
Avg commute
Housing
$189,400$-28,200 vs state
Median home value
$840
Median rent
77.2%
Homeownership rate
24,746
Total housing units
92.9%
Occupied
7.1%
Vacant
22.8%
Renter-occupied
Social & access
94.0%
With health insurance
93.5%
With broadband internet
10.9%
Foreign-born
6.9%
Veterans (18+)
13.8%
With a disability
97.2%
Speak language other than English at home
Education
91.4%
High School+
18.0%
Bachelor's+
Largest cities in Michigan
Other counties in Michigan
Part of Michigan
Metro areas in Michigan
County rankings
Frequently Asked Questions
Ionia County, Michigan has a population of 66,706 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 29th-largest county in Michigan. Population density is 117 people per square mile.
The population of Ionia County has grown 3.8% since 2010 (63,847 → 66,250), a +0.26% annualized rate.
The median household income in Ionia County, Michigan is $73,436, with mean (average) household income of $84,553 and per-capita income of $31,593. 7.5% of residents live below the federal poverty level.
In Ionia County, the largest racial and ethnic groups are White (87.6%), Black or African American (3.8%), Hispanic or Latino (3.0%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Ionia County, Michigan is 38.8 years. Residents are 45.7% female and 54.3% male.
The median home value in Ionia County is $189,400 and median monthly rent is $840. 77.2% of occupied housing units are owner-occupied. The county has 24,746 total housing units, 7.1% of which are vacant.
The largest employment sector in Ionia County, Michigan is manufacturing, employing 20.9% of workers. The unemployment rate is 2.9%.
Detroit is among the largest cities associated with Ionia County, Michigan, with a population of 636,644.
Ionia County, MI Climate
Ionia County, MI has an average annual temperature of 8.4°C (47°F) and receives about 862 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
8.4°C
Avg Temp
862
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -6° / 22° | 44 mm |
| February | -4° / 24° | 38 mm |
| March | 1° / 34° | 62 mm |
| April | 8° / 46° | 79 mm |
| May | 14° / 58° | 79 mm |
| June | 19° / 67° | 88 mm |
| July | 22° / 71° | 68 mm |
| August | 21° / 69° | 97 mm |
| September | 16° / 61° | 100 mm |
| October | 10° / 50° | 69 mm |
| November | 3° / 38° | 72 mm |
| December | -3° / 27° | 66 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 Ionia County, MI
The most comfortable months to visit Ionia County, MI are typically July, August and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 29°C high). The coldest is January (near -10°C low). September is usually the wettest month.
Where to stay near Ionia County
Visiting or relocating to Ionia County, MI? Compare hotels and short-term rentals across the county — live availability and prices.
Top-rated places to stay near Ionia County
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a move to Ionia County?
Get relocation and cost-of-living insights for Ionia County, MI by email. No spam, unsubscribe anytime.
More from Michigan
Population 1,773,767
Population 1,272,294
Population 877,624
Population 658,844
Full rankings of Michigan counties
Statewide data for Michigan
Population, race, income, age, and trends across Michigan
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.