Hamilton County, Ohio Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 3rd-largest in Ohio
The population of Hamilton County, Ohio is 827,878 as of the 2023 American Community Survey, making it the 3rd-largest county in Ohio. The median household income is $70,816, the median home value is $225,700, and the median age is 36.9.
The population of Hamilton County has grown 4.4% since 2010 (802,295 → 837,359), a +0.31% annualized rate.
827,878
Population
+0.31%
Annual growth
2042
People / sq mi
$70,816
Median Income
$225,700
Median Home Value
Hamilton County covers 405 sq mi of land at 2041.9 people per square mile.
About Hamilton County, OH
Hamilton County stands apart on settlement density — it is among the most densely settled of US counties, at roughly 2,042 people per square mile. With 827,878 residents, Hamilton County is a county in Ohio. That makes it one of the ten largest counties in Ohio in the country, at #3 by population.
The typical household here earns about $70,816, below the US median of $78,538. The poverty rate is 10.1%, below the national 12.4%. A typical home is worth $225,700, with typical rent around $1,005.
The population is unusually well-credentialed for US counties — 41.4% of adults have a four-year degree, above the national 35.0%. Remote work is on the higher side at 13.7%, close to the national 14.0%, and the average commute runs about 23 minutes each way.
That density explains much of the rest of the profile in Hamilton County: denser places lean toward renting, shorter commutes by transit, and a younger working-age mix.
Hamilton County Population History (2010-2024)
The county of Hamilton County had a population of 802,295 in 2010 and 837,359 in 2024, a 4.4% growth over 14 years. The peak was 837,359 in 2024. Average annual growth rate: 0.31%.
837,359
Population (2024)
802,295
Population (2010)
837,359
Peak (2024)
0.31%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 802,295 |
| 2011 | 800,746 |
| 2012 | 802,564 |
| 2013 | 805,408 |
| 2014 | 807,922 |
| 2015 | 809,902 |
| 2016 | 811,766 |
| 2017 | 814,693 |
| 2018 | 815,853 |
| 2019 | 818,653 |
| 2020 | 830,418 |
| 2021 | 827,564 |
| 2022 | 826,970 |
| 2023 | 831,559 |
| 2024 | 837,359 |
Race & Ethnicity
| White | 64.3% |
| Black or African American | 25.1% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.0% |
| Two or More Races | 0.0% |
Age & Sex
36.9
Median Age
51.4%
Female
48.6%
Male
16.2%
Age 65+
Age Distribution
Children (under 15): 19.2% · Seniors (65+): 16.2%
Income & Poverty
| Median household income | $70,816+$1,136 vs state |
| Mean household income | $103,444 |
| Per-capita income | $44,328 |
| Poverty rate | 10.1%+0.9% vs state |
| Unemployment rate | 3.3% |
| Employment-to-population | 63.0% |
Top Industries by Employment
The largest employment sector in Hamilton County is professional & business services, accounting for 25.1% of workers.
How residents commute
2.8%
Drive alone
2.6%
Carpool
71.9%
Public transit
13.7%
Work from home
23.3 min
Avg commute
Housing
$225,700+$26,500 vs state
Median home value
$1,005
Median rent
59.0%
Homeownership rate
380,414
Total housing units
92.6%
Occupied
7.4%
Vacant
41.0%
Renter-occupied
Social & access
94.2%
With health insurance
94.2%
With broadband internet
21.9%
Foreign-born
5.7%
Veterans (18+)
12.6%
With a disability
92.1%
Speak language other than English at home
Education
92.5%
High School+
41.4%
Bachelor's+
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County rankings
Common questions about Hamilton County, OH
Frequently Asked Questions
Hamilton County, Ohio has a population of 827,878 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 3rd-largest county in Ohio. Population density is 2042 people per square mile.
The population of Hamilton County has grown 4.4% since 2010 (802,295 → 837,359), a +0.31% annualized rate.
The median household income in Hamilton County, Ohio is $70,816, with mean (average) household income of $103,444 and per-capita income of $44,328. 10.1% of residents live below the federal poverty level.
In Hamilton County, the largest racial and ethnic groups are White (64.3%), Black or African American (25.1%), Hispanic or Latino (1.0%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Hamilton County, Ohio is 36.9 years. Residents are 51.4% female and 48.6% male.
The median home value in Hamilton County is $225,700 and median monthly rent is $1,005. 59.0% of occupied housing units are owner-occupied. The county has 380,414 total housing units, 7.4% of which are vacant.
The largest employment sector in Hamilton County, Ohio is professional, scientific, and management services, employing 25.1% of workers. The unemployment rate is 3.3%.
Columbus is among the largest cities associated with Hamilton County, Ohio, with a population of 906,480.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.