How many people live in Ionia County, MI?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 66,300 people living in Ionia County, MI. That makes Ionia County the 30th-most populous county in Michigan. It is home to 0.65% of people living in the state.
66.3K
population of Ionia County, MI (2024)
0.65%
County share of the Michigan population (2024)
About 66,300 people lived in Ionia County, MI in 2024.
Population estimates, 2000–2024
What are Ionia County, MI’s age demographics?
About 11,200 Ionia County residents are aged 65 and older in 2024. That represents 16.9% of its population. For comparison, the age group represents 19.6% of Michigan’s population and 18% in the US overall.
Another 13,400 Ionia County residents, or 20.3% 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 higher share of Ionia County, MI's population is aged 45–64 than the US as a whole.
Population estimates by age group, (2024)
What are Ionia County, MI’s racial and ethnic demographics?
Non-Hispanic white residents make up 86.3% of the Ionia County, MI population, higher than the national share of 57.5%.
In contrast, Ionia County’s Hispanic population accounts for 5.6%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 5.5% 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.
Ionia 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 Ionia County, MI is Ionia with about 12,300 residents in 2024.
Cities and towns in Ionia County, MI ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Ionia | 12,265 |
| 2. | Belding | 5,967 |
| 3. | Portland | 3,945 |
| 4. | Portland | 3,770 |
| 5. | Easton | 3,104 |
| 6. | Danby | 2,979 |
| 7. | Orleans | 2,723 |
| 8. | Otisco | 2,292 |
| 9. | Berlin | 2,151 |
| 10. | Lake Odessa | 2,065 |
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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.
