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+
Largest cities in Ohio
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.
Montgomery County, OH Climate
Montgomery County, OH has an average annual temperature of 11.1°C (52°F) and receives about 988 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
11.1°C
Avg Temp
988
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -3° / 27° | 60 mm |
| February | -1° / 31° | 57 mm |
| March | 5° / 41° | 85 mm |
| April | 11° / 51° | 98 mm |
| May | 17° / 62° | 110 mm |
| June | 21° / 71° | 93 mm |
| July | 24° / 74° | 101 mm |
| August | 23° / 73° | 87 mm |
| September | 19° / 66° | 70 mm |
| October | 12° / 54° | 70 mm |
| November | 6° / 43° | 82 mm |
| December | 0° / 32° | 75 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 Montgomery County, OH
The most comfortable months to visit Montgomery County, OH are typically June, September and August, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 30°C high). The coldest is January (near -7°C low). May is usually the wettest month.
Where to stay near Montgomery County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.