• county
  • FIPS 39061
  • Largest town: Cincinnati

Hamilton County, Ohio

Hamilton County had 837,359 residents in the Census Vintage 2024 estimate, on 405.5 square miles of land. It ranks 3rd of 88 in Ohio by population and 74th by land area.

Population
837,359
#3 of 88 in Ohio · #76 in US
Area
405.5 sq mi
#74 of 88 in Ohio · #2,498 in US
Density
2,065 / sq mi
#3 of 88 in Ohio · #71 in US
Median household income
$68,810
#35 of 88 in Ohio · #1,079 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Hamilton County within Ohio. Pin: Columbus.

Measure from here

Tools and pages that start from Hamilton County

Hamilton County population, land area and income

Hamilton County had 837,359 residents in the Census Vintage 2024 estimate, on 405.5 square miles of land. It ranks 3rd of 88 in Ohio by population and 74th by land area. That works out to 2,065.3 people per square mile, 21.5 times the US average of 96.3, and in the top tenth nationally.

The median county-equivalent in Ohio has 58,250 residents, so Hamilton County is 14.4 times that size.

Its SAIPE 2023 median household income of $68,810 is above the national county median among 3,143 counties with an estimate.

National rank among 3,144

Population

837,359

3144th1st

76th of 3,144 (US)

Land area

405 sq mi

3144th1st

2498th of 3,144 (US)

Density

2,065.3 / sq mi

3144th1st

71st of 3,144 (US)

Median household income

$68,810

3143rd1st

1079th of 3,143 (US)

Rank within Ohio (88)

Population

837,359

88th1st

3rd of 88 (OH)

Land area

405 sq mi

88th1st

74th of 88 (OH)

Density

2,065.3 / sq mi

88th1st

3rd of 88 (OH)

Median household income

$68,810

88th1st

35th of 88 (OH)

How Hamilton County's population changed since 2020

Hamilton County gained 6,941 residents between the July 2020 and July 2024 estimates, a rise of 0.8%. That ranks 25th of 88 in Ohio for growth. The median Ohio county changed by -0.2%, and the state as a whole by +0.7%.

Since the April 2020 estimates base, Hamilton County recorded 43,589 births and 36,902 deaths, a natural change of +6,687. Net international migration added +18,773 and net domestic migration, people moving to or from other US counties, came to -18,862. The largest single component was domestic migration, which removed 18,862 people.

830.4k2020827.6k2021827.0k2022831.6k2023837.4k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
43,589
Deaths
36,902
Net international migration
+18,773
Net domestic migration
-18,862
Change, July 2023 to July 2024
+5,800

Where Hamilton County is

The Census internal point of Hamilton County is at 39.196900, -84.544200. It sits in UTM zone 16N. The map shades Ohio's 88 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Hamilton County outlined. Dots are towns of 1,000+ people with residents in it.

Shelby County: -0.4%Defiance County: +1.0%Darke County: -0.8%Seneca County: -0.6%Wood County: +0.6%Fayette County: -0.7%Clark County: -0.7%Hocking County: -2.2%Jackson County: +0.2%Miami County: +2.7%Richland County: -0.1%Union County: +13.7%Auglaize County: -1.2%Hancock County: +0.1%Morgan County: -1.6%Van Wert County: -0.1%Hardin County: -1.0%Paulding County: -0.3%Portage County: +1.2%Delaware County: +10.6%Harrison County: -3.1%Ross County: -1.3%Crawford County: -0.9%Clinton County: -0.0%Henry County: -0.5%Pike County: -0.0%Cuyahoga County: -1.7%Highland County: +1.0%Knox County: +1.7%Ottawa County: -1.5%Huron County: -0.6%Erie County: -2.2%Holmes County: +1.0%Lawrence County: -4.0%Marion County: -0.6%Fairfield County: +5.2%Putnam County: -0.6%Guernsey County: -0.5%Vinton County: -2.1%Gallia County: -1.2%Trumbull County: -0.7%Wayne County: -0.2%Perry County: +0.6%Ashland County: -0.1%Fulton County: -1.4%Brown County: +1.4%Lucas County: -1.1%Stark County: -0.1%Medina County: +1.1%Belmont County: -2.4%Williams County: -1.4%Mahoning County: -1.0%Noble County: +1.1%Greene County: +2.5%Preble County: -0.5%Allen County: -1.2%Athens County: +1.3%Jefferson County: -2.0%Adams County: +0.8%Monroe County: -2.3%Washington County: -2.2%Logan County: -0.1%Franklin County: +2.4%Warren County: +5.3%Wyandot County: -2.1%Licking County: +3.4%Hamilton County: +0.8%Clermont County: +2.6%Butler County: +2.2%Coshocton County: +1.1%Geauga County: -0.0%Sandusky County: -0.0%Ashtabula County: -0.6%Carroll County: -0.9%Tuscarawas County: -1.2%Morrow County: +2.7%Montgomery County: +0.1%Mercer County: +0.3%Lake County: -0.1%Pickaway County: +6.0%Madison County: +3.8%Muskingum County: +0.1%Meigs County: -3.0%Columbiana County: -1.8%Lorain County: +2.7%Scioto County: -2.8%Champaign County: +0.4%Summit County: -0.3%
Change 2020 to 2024
  1. < -1.4%
  2. < -0.6%
  3. < -0.0%
  4. < +1.1%
  5. ≥ +1.1%
no data

Orange pin: Hamilton County internal point. Dark pin: Columbus.

Internal point

Decimal
39.196900, -84.544200
DMS
39°11'48.84"N 84°32'39.12"W
UTM
16N 712074.6E 4341500.5N
Geohash
dngyupsf3
Plus code
86FQ5FW4+Q8

Towns in Hamilton County

34 incorporated places of 1,000+ people have residents in Hamilton County, 541,735 people together, or 65% of the county. Each figure counts only the part of the town inside Hamilton County; towns marked "part" extend into another county. The largest is Cincinnati with 314,915.

  1. 01Cincinnati314,915
  2. 02Forest Park20,033
  3. 03Norwood19,455
  4. 04Blue Ash13,616
  5. 05Harrison13,526
  6. 06Sharonville (part)11,464
  7. 07Springdale11,183
  8. 08Montgomery10,952
  9. 09Reading10,482
  10. 10Loveland (part)9,705
  11. 11North College Hill9,552
  12. 12Madeira9,542
  13. 13Wyoming8,781
  14. 14Cheviot8,640
  15. 15Mount Healthy6,916
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Hamilton County

The Census 2024 county adjacency file lists 8 neighbors for Hamilton County, including 5 across a state line. The most populous is Butler County, OH, with 399,542 residents. Distances run between Census internal points in a straight line.

Distance to Columbus and the nearest big city

Columbus is 97.7 miles ENE of Hamilton County's internal point in a straight line. The nearest place of 100,000 or more is Cincinnati, OH (population 314,915), 4.4 miles away.

Hamilton County FIPS code

The FIPS code of Hamilton County is 39061: state code 39 for Ohio plus county code 061. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $68,810.

Questions people ask

What is the population of Hamilton County, Ohio?

The Census Vintage 2024 estimate for July 1, 2024 is 837,359. That is up 6,941 people (0.8%) from the July 2020 estimate of 830,418.

What is the FIPS code of Hamilton County?

39061. The first two digits (39) are Ohio; the last three (061) identify the county.

What is the largest town in Hamilton County?

Cincinnati, with 314,915 residents inside Hamilton County in 2024.

Which counties border Hamilton County?

8 county-equivalents border it in the Census 2024 adjacency file: Butler County, OH; Warren County, OH; Clermont County, OH; Kenton County, KY; Boone County, KY; Campbell County, KY; Dearborn County, IN; Franklin County, IN.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.