Population
112,634
2025
+3.4% since 2020
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025), 2025. Resident population, July 1 estimate.
Miami County, OH: population growth, jobs and income
Miami County gained 762 residents between 2024 and 2025 (+0.7%).
Miami County had an estimated 112,634 residents in 2025, up 3.4% (3,660 more people) since 2020. That is faster than Ohio as a whole (+0.9%), and the 11th fastest growth of 88 counties in Ohio.
Data as of 2025 · updated
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In the Miami County report
One-time $99 PDF: everything on this page for Miami County, ranked against Ohio and the U.S., plus these figures that are not on the free page:
- Median gross rent$966/mo2020–24
- Vacant homes, incl. seasonal and second homes4.9%2020–24
- New homes permitted, last 12 months3592025-10/2026-09
- Rent growth, 5 yearsIn the report
- Permits in 5+ unit buildingsIn the report
- IRS income moving in (net AGI)In the report
- Neighbouring-county comparison tableIn the report
What's inside: 5 pages
- 1 Summary, headline numbers and ranks (free preview)
- 2 Ranks and the neighbouring-county table
- 3 Migration, with IRS mover and income flows
- 4 Rent, vacant homes, permits and employers
- 5 Every source and the methods
Headline numbers
Net domestic migration
+752
2025
6.7 per 1,000 residents
+3,945 in total, 2021–2025
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025), 2025. People moving in from other U.S. counties minus people moving out.
Unemployment rate
4.4%
2025
+0.6 pts since 2019
Source: U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics, 2025. Annual average unemployment rate.
New homes permitted
340
2025
+10.7% since 2021
3.0 per 1,000 residents
Source: U.S. Census Bureau, Building Permits Survey, 2025. Housing units authorized by building permits in the year.
Median household income
$76,817
2020–24
+23.2% since 2016–20
Source: U.S. Census Bureau, American Community Survey 5-year estimates, 2020–24. American Community Survey 5-year estimate.
Private-sector employment
37,513
2023
+3.8% since 2018
Source: U.S. Census Bureau, County Business Patterns, 2023. Paid employees of private employers in mid-March (County Business Patterns).
What the numbers say
Net domestic migration added 752 people in 2025: more people moved in from other U.S. counties than moved out.
Private employers had 37,513 paid employees in mid-March 2023, +3.8% since 2018 (County Business Patterns).
Unemployment averaged 4.4% in 2025, 0.6 points higher than in 2019 (before the pandemic).
Builders were authorized to start 340 new homes in 2025, or 3.0 per 1,000 residents.
Median household income was $76,817 in the 2020–24 American Community Survey, +23.2% since 2016–20.
Across the 3,107 U.S. counties with a comparable estimate, its population growth ranks 900th.
Part of the Dayton-Kettering-Beavercreek, OH metro area.
Get Miami County’s next numbers by email
Email me when Miami County gets new Census numbers: population, building permits, jobs and income. About 4 emails a year, one click to stop.
Miami County population by year
| Year | Population | Change |
|---|---|---|
| 2025 | 112,634 | +762 |
| 2024 | 111,872 | +947 |
| 2023 | 110,925 | +708 |
| 2022 | 110,217 | +825 |
| 2021 | 109,392 | +418 |
| 2020 | 108,974 | – |
Census Bureau population estimates, July 1 of each year.
What drove the change in Miami County
Miami County grew by 3,660 people since 2020; the largest part came from domestic migration (+3,945).
| Component | 2025 | 2020–25 | Share |
|---|---|---|---|
| Natural changebirths minus deaths | −73 | −914 | |
| International migrationfrom and to other countries | +88 | +601 | |
| Domestic migrationfrom and to other U.S. counties | +752 | +3,945 | |
| Census adjustmentbalancing residual | −5 | +28 | |
| Total change | +762 | +3,660 |
Census Bureau population estimates, components of change, each year July 1 to June 30. The components add up to the change in the estimate; the Census adjustment is the small balancing figure the Bureau publishes.
How it ranks
| Measure | In Ohio | Among U.S. counties |
|---|---|---|
| Population growth | 11th of 88 | 900th of 3,107 |
| Net domestic migration per 1,000 residents | 17th of 88 | 868th of 3,108 |
| Private-sector job growth | 31st of 88 | 1,377th of 3,092 |
| Median household income | 16th of 88 | 730th of 3,107 |
| Lowest unemployment rate | 28th of 88 | 2,040th of 3,108 |
| New homes permitted per 1,000 residents | 16th of 88 | 1,114th of 3,005 |
1st = highest (lowest for unemployment). Counties are ranked only against others with a figure for the same period.
Get the county report — $99
The County Growth and Demographics Report for Miami County, OH as a PDF, from federal data: population and migration, housing and rents, permits, private employers and jobs, unemployment, ranks in the state and the country, and neighbouring counties, with a source next to every number. Pay once, no subscription.
Add 2 neighbouring counties for $50: the Montgomery County and Clark County reports too, $149 for all 3.
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Neighbouring counties
Miami County grew faster than all 5 of its neighbouring counties (+3.4%, 2020–25).
Its median household income ($76,817, 2020–24) is higher than in all 5 of its neighbouring counties.
| County | Population2025 | Population change2020–25 | Net domestic migration per 1,000 residents2025 | Homes permitted per 1,000 residents2025 | Median household income2020–24 |
|---|---|---|---|---|---|
| Miami County, OH This county | 112,634 | +3.4% | 6.7 | 3.0 | $76,817 |
| Montgomery County, OH | 539,598 | +0.5% | 3.1 | 2.0 | $66,139 |
| Shelby County, OH | 48,065 | −0.2% | −0.7 | 6.4 | $73,978 |
| Darke County, OH | 51,520 | −0.7% | 0.9 | 1.1 | $64,486 |
| Clark County, OH | 135,340 | −0.4% | −6.7 | 2.9 | $63,132 |
| Champaign County, OH | 38,820 | +0.2% | 4.3 | 1.2 | $75,556 |
Census Bureau population estimates and building permits, American Community Survey 5-year income. Rates per 1,000 residents. – means no figure, or a base too small for a change or rate (it would swing on a few people). A figure from another period shows its year and is left out of the comparison.
Questions
Is Miami County growing?
Yes. Its population grew 3.4% between 2020 and 2025, about 3,660 more people (Census Bureau population estimates). Ohio as a whole changed +0.9% over the same years. That ranks 11th of 88 counties in Ohio for population growth.
How many people moved to Miami County?
On net, about 752 people in 2025: that many more moved in from other U.S. counties than moved out (Census Bureau net domestic migration estimate).
What is the unemployment rate in Miami County?
It averaged 4.4% in 2025 (BLS Local Area Unemployment Statistics, annual average).
What is the population of Miami County?
About 112,634 people, according to the U.S. Census Bureau's population estimate for July 1, 2025.
How many jobs are in Miami County?
Private employers there had 37,513 paid employees in mid-March 2023, +3.8% since 2018 (Census Bureau County Business Patterns; government jobs and the self-employed are not counted).
What Beacon CRE covers in Ohio
Map, parcel and listing layers cover North and South Carolina only for now. This page and the other Ohio county pages carry the public federal growth figures.
Miami County data alerts
Email me when Miami County gets new Census numbers: population, building permits, jobs and income. About 4 emails a year, one click to stop.
Sources and method
- U.S. Census Bureau, Population Estimates Program (Vintage 2025)
- U.S. Bureau of Labor Statistics, Local Area Unemployment Statistics
- U.S. Census Bureau, Building Permits Survey
- U.S. Census Bureau, American Community Survey 5-year estimates
- U.S. Census Bureau, County Business Patterns
Each number shows its own period. Changes compare the latest period with five years earlier (or the earliest period available). Beacon CRE last refreshed these figures on 2026-11-05. Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how we compute every number. More on every layer: data sources and licences.
Jobs outside North and South Carolina use County Business Patterns (paid private-sector employees in mid-March); wages and government jobs are not included.