Hamilton County, Ohio
|Hamilton County, Ohio|
Location in the state of Ohio
Ohio's location in the U.S.
|Founded||January 2, 1790|
|Named for||Alexander Hamilton|
412.63 sq mi (1,069 km²)
405.91 sq mi (1,051 km²)
6.72 sq mi (17 km²), 1.63%
1,976.7/sq mi (763/km²)
|Time zone||Eastern: UTC-5/-4|
Hamilton County is a county located in the southwest corner of the state of Ohio, United States. The county seat is Cincinnati. According to the 2010 census, it has a population of 802,374, which is a decrease of 5.1% from 845,303 in 2000. This made it the third most populous county in Ohio. The county is named for the first Secretary of the Treasury, Alexander Hamilton.
Most of Hamilton County was originally owned and surveyed by John Cleves Symmes, and the region was a part of the Symmes Purchase. The first European-American settlers rafted down the Ohio River in 1788 following the American Revolutionary War. They established the towns of Losantiville (later Cincinnati) and Cleves.
Hamilton County was organized in 1790, as the second county in the Northwest Territory. Its area then included about one-eighth of Ohio, and had about 2,000 inhabitants (not including the remaining Native Americans). The United States persuaded most of the Shawnee and other Indian peoples to remove in the 1820s to locations west of the Mississippi River.
Since then, other counties were created from Hamilton, reducing the county to its present size. Rapid growth occurred during the 1830s and 1840s as the area attracted many German and Irish immigrants, especially after the Great Famine in Ireland and the revolutions in Germany in 1848.
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As of 2012, the members of the Hamilton Board of County Commissioners include Greg Hartmann, Chris Monzel, and Todd Portune. Since 1963, the Board has employed an administrator to run the day-to-day operations of the county; the current administrator is Christian Sigman.
Other elected officers include Dusty Rhodes (Auditor), Joe Deters (Prosecutor), Jim Neil (Sheriff), Theodore B. Hubbard, (Engineer), Wayne Coates (Recorder), Robert A. Goering (Treasurer), and Dr. Lakshmi Sammarco (Coroner).
The elected Common Pleas Court include: Judge Nadine Allen, Judge Kim Wilson Burke, Judge Ethna M. Cooper, Judge Pat DeWine, Judge Dennis S. Helmick Judge Charles J. Kubicki, Jr., Judge Jody M. Luebbers, Judge Melba D. Marsh, Judge Steven E. Martin, Judge Jerome J. Metz, Jr., Judge Beth A. Myers Judge Norbert A. Nadel, Judge Robert P. Ruehlman, Judge John Andrew West, Judge Ralph E. Winkler, Judge Robert C. Winkler
According to the 2010 census, the county has a total area of 412.63 square miles (1,068.7 km2), of which 405.91 square miles (1,051.3 km2) (or 98.37%) is land and 6.72 square miles (17.4 km2) (or 1.63%) is water.
Geographic features 
The county lies in a region of gentle hills formed by the slopes of the Ohio River valley and its tributaries. The Great Miami River, the Little Miami River, and the Mill Creek also contribute to this system of hillsides and valleys.
The county boundaries include the lowest point in Ohio, located in Miami Township, where the Ohio River flows out of Ohio and into Indiana. This is the upper pool elevation behind the Markland Dam, 455 feet (139 m) above sea level.
Major highways 
Interstate 71, Interstate 74, Interstate 75, Interstate 471 and Interstate 275 serve the county. The Norwood Lateral and Ronald Reagan Highway are also prominent east-west thoroughfares in the county.
Adjacent counties 
- Butler County, Ohio - north
- Warren County, Ohio - northeast
- Clermont County, Ohio - east
- Boone County, Kentucky - southwest
- Kenton County, Kentucky - south
- Campbell County, Kentucky - southeast
- Dearborn County, Indiana - west
As of the 2000 census, there were 845,303 people, 346,790 households, and 212,582 families residing in the county. The population density was 2,075 people per square mile (801/km²). There were 373,393 housing units at an average density of 917 per square mile (354/km²). The racial makeup of the county was 72.93% White, 23.43% Black or African American, 0.18% Native American, 1.61% Asian, 0.03% Pacific Islander, 0.51% from other races, and 1.32% from two or more races. 1.13% of the population were Hispanic or Latino of any race.
There were 346,790 households out of which 30.20% had children under the age of 18 living with them, 43.40% were married couples living together, 14.30% had a female householder with no husband present, and 38.70% were non-families. 32.90% of all households were made up of individuals and 10.60% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 3.07.
In the county the population was spread out with 25.80% under the age of 18, 9.60% from 18 to 24, 29.70% from 25 to 44, 21.50% from 45 to 64, and 13.50% who were 65 years of age or older. The median age was 36 years. For every 100 females there were 91.10 males. For every 100 females age 18 and over, there were 86.80 males.
The median income for a household in the county was $40,964, and the median income for a family was $53,449. Males had a median income of $39,842 versus $28,550 for females. The per capita income for the county was $24,053. About 8.80% of families and 11.80% of the population were below the poverty line, including 16.20% of those under age 18 and 8.70% of those age 65 or over.
Census-designated places 
Other localities 
- † Only partially in Hamilton County
Public elementary and secondary education is provided by a number of independent school districts, supplemented by a county vocational school district, the Great Oaks Institute of Technology and Career Development. The parochial schools of various denominations add to this base. Among these the Roman Catholic Archdiocese of Cincinnati maintains a system of 108 elementary and 22 secondary schools, the ninth largest private system in the United States. Cincinnati public schools are 71% African American while most suburban school districts are predominantly White.
Colleges and universities 
The county, in cooperation with the City of Cincinnati, operates the Public Library of Cincinnati and Hamilton County system with a main library and 41 branches. Major sports teams are listed under the communities in which they are located, primarily Cincinnati. The Hamilton County Park District resides within Hamilton County and maintains a series of preserves and educational facilities. Three of the largest parks within the system are Miami Whitewater Forest, Winton Woods, and Sharon Woods.
See also 
- "Ohio County Profiles: Hamilton County" (PDF). Ohio Department of Development. Retrieved 2007-04-28.
- "Hamilton County QuickFacts". United States Census Bureau. Retrieved 2012-02-16.
- "Hamilton County data". Ohio State University Extension Data Center. Archived from the original on 2007-12-03. Retrieved 2007-04-28.
- "Hamilton County Elected Officials". Retrieved 13 September 2012.
- "Census 2010 U.S. Gazetteer Files: Counties". United States Census. Retrieved 2011-11-05.
- "Markland". United States Army Corps of Engineers: Louisville District. Archived from the original on 2012-02-09.
- of Cincinnati
- "U.S. Decennial Census". Census.gov. Retrieved March 17, 2013.
- "Annual Estimates of the Resident Population: April 1, 2010 to July 1, 2012". Retrieved March 17, 2013.
- Hamilton County official website
- Hamilton County Park District
- Hamilton County Board of Mental Retardation & Developmental Disabilities
- Hamilton County, Ohio History and Genealogy
- Flag of Hamilton County: crwflags.com and ihiochannel.org
||Franklin County, Indiana||Butler County||Warren County|
|Dearborn County, Indiana||Clermont County|
|Boone County, Kentucky||Kenton County, Kentucky||Campbell County, Kentucky|