Montgomery County, Ohio Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 5th-largest in Ohio
The population of Montgomery County, Ohio is 535,528 as of the 2023 American Community Survey, making it the 5th-largest county in Ohio. The median household income is $64,403, the median home value is $167,400, and the median age is 38.8.
The population of Montgomery County has grown 0.3% since 2010 (535,620 → 537,443), a +0.02% annualized rate.
535,528
Population
+0.02%
Annual growth
1161
People / sq mi
$64,403
Median Income
$167,400
Median Home Value
Montgomery County covers 461 sq mi of land at 1160.8 people per square mile.
About Montgomery County, OH
Montgomery County stands apart on settlement density — it is among the most densely settled of US counties, at roughly 1,161 people per square mile. With 535,528 residents, Montgomery County is a county in Ohio. That makes it one of the ten largest counties in Ohio in the country, at #5 by population.
Median household income is $64,403, below the US median of $78,538. About 10.7% of residents live below the federal poverty level, below the national 12.4%. Homes carry a median value of $167,400, with typical rent around $968.
About 30.5% of adults 25 and older have a bachelor’s degree, below the 35.0% national figure. About 10.5% of workers primarily work from home, below the national 14.0%, and the average commute runs about 22 minutes each way.
That density explains much of the rest of the profile in Montgomery County: denser places lean toward renting, shorter commutes by transit, and a younger working-age mix.
Montgomery County Population History (2010-2024)
The county of Montgomery County had a population of 535,620 in 2010 and 537,443 in 2024, a 0.3% growth over 14 years. The peak was 537,443 in 2024. Average annual growth rate: 0.02%.
537,443
Population (2024)
535,620
Population (2010)
537,443
Peak (2024)
0.02%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 535,620 |
| 2011 | 534,638 |
| 2012 | 534,464 |
| 2013 | 534,448 |
| 2014 | 532,708 |
| 2015 | 532,059 |
| 2016 | 532,274 |
| 2017 | 531,964 |
| 2018 | 531,954 |
| 2019 | 532,139 |
| 2020 | 537,139 |
| 2021 | 536,229 |
| 2022 | 534,355 |
| 2023 | 535,313 |
| 2024 | 537,443 |
Race & Ethnicity
| White | 69.2% |
| Black or African American | 20.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.2% |
| Two or More Races | 0.0% |
Age & Sex
38.8
Median Age
51.6%
Female
48.4%
Male
18.4%
Age 65+
Age Distribution
Children (under 15): 18.3% · Seniors (65+): 18.4%
Income & Poverty
| Median household income | $64,403$-5,277 vs state |
| Mean household income | $86,066 |
| Per-capita income | $37,320 |
| Poverty rate | 10.7%+1.5% vs state |
| Unemployment rate | 3.6% |
| Employment-to-population | 58.7% |
Top Industries by Employment
The largest employment sector in Montgomery County is professional & business services, accounting for 25.4% of workers.
How residents commute
1.5%
Drive alone
2.2%
Carpool
77.0%
Public transit
10.5%
Work from home
22.0 min
Avg commute
Housing
$167,400$-31,800 vs state
Median home value
$968
Median rent
62.3%
Homeownership rate
252,475
Total housing units
91.2%
Occupied
8.8%
Vacant
37.7%
Renter-occupied
Social & access
93.5%
With health insurance
93.9%
With broadband internet
23.2%
Foreign-born
8.5%
Veterans (18+)
15.2%
With a disability
93.1%
Speak language other than English at home
Education
92.1%
High School+
30.5%
Bachelor's+
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Other counties in Ohio
Part of Ohio
Metro areas in Ohio
County rankings
Common questions about Montgomery County, OH
Frequently Asked Questions
Montgomery County, Ohio has a population of 535,528 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 5th-largest county in Ohio. Population density is 1161 people per square mile.
The population of Montgomery County has grown 0.3% since 2010 (535,620 → 537,443), a +0.02% annualized rate.
The median household income in Montgomery County, Ohio is $64,403, with mean (average) household income of $86,066 and per-capita income of $37,320. 10.7% of residents live below the federal poverty level.
In Montgomery County, the largest racial and ethnic groups are White (69.2%), Black or African American (20.5%), Hispanic or Latino (1.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Montgomery County, Ohio is 38.8 years. Residents are 51.6% female and 48.4% male.
The median home value in Montgomery County is $167,400 and median monthly rent is $968. 62.3% of occupied housing units are owner-occupied. The county has 252,475 total housing units, 8.8% of which are vacant.
The largest employment sector in Montgomery County, Ohio is professional, scientific, and management services, employing 25.4% of workers. The unemployment rate is 3.6%.
Columbus is among the largest cities associated with Montgomery County, Ohio, with a population of 906,480.
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Statewide data for Ohio
Population, race, income, age, and trends across Ohio
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.