Hamilton County, Ohio

Hamilton County
County
Hamilton County Courthouse
Flag of Hamilton County
Official seal of Hamilton County
Official logo of Hamilton County
Map of Ohio highlighting Hamilton County
Location within the U.S. state of Ohio
Map of the United States highlighting Ohio
Ohio's location within the U.S.
Coordinates: 39°12′N 84°32′W / 39.2°N 84.54°W / 39.2; -84.54
Country United States
State Ohio
FoundedJanuary 2, 1790[1]
Named forAlexander Hamilton
SeatCincinnati
Largest cityCincinnati
Area
 • Total413 sq mi (1,070 km2)
 • Land406 sq mi (1,050 km2)
 • Water6.7 sq mi (17 km2)  1.6%
Population
 (2020)
 • Total830,639
 • Estimate 
(2022)
825,037 Decrease
 • Density2,000/sq mi (780/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional districts1st, 8th
Websitewww.hamilton-co.org

Hamilton County is located in the southwestern corner of the U.S. state of Ohio. As of the 2020 census, the population was 830,639,[2] making it the third-most populous county in Ohio. The county seat and largest city is Cincinnati.[3] The county is named for the first Secretary of the Treasury, Alexander Hamilton.[4] Hamilton County is part of the Cincinnati-Middletown, OH-KY-IN Metropolitan Statistical Area.

  1. ^ "Ohio County Profiles: Hamilton County" (PDF). Ohio Department of Development. Archived from the original (PDF) on June 21, 2007. Retrieved April 28, 2007.
  2. ^ "U.S. Census Bureau QuickFacts: Hamilton County, Ohio". www.census.gov. United States Census Bureau. Retrieved April 1, 2022.
  3. ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.
  4. ^ "Hamilton County data". Ohio State University Extension Data Center. Archived from the original on December 3, 2007. Retrieved April 28, 2007.

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