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+
Largest cities in Ohio
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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.
Hamilton County, OH Climate
Hamilton County, OH has an average annual temperature of 12°C (54°F) and receives about 1072 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
12°C
Avg Temp
1072
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -2° / 29° | 69 mm |
| February | 1° / 33° | 67 mm |
| March | 6° / 43° | 100 mm |
| April | 12° / 53° | 101 mm |
| May | 17° / 63° | 117 mm |
| June | 22° / 72° | 97 mm |
| July | 24° / 76° | 102 mm |
| August | 23° / 74° | 95 mm |
| September | 20° / 67° | 77 mm |
| October | 13° / 56° | 76 mm |
| November | 7° / 45° | 89 mm |
| December | 1° / 34° | 82 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 Hamilton County, OH
The most comfortable months to visit Hamilton County, OH are typically September, June and August, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 31°C high). The coldest is January (near -6°C low). May is usually the wettest month.
Where to stay near Hamilton County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.