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Hamilton County, Ohio

From Wikipedia, the free encyclopedia

Hamilton County
Hamilton 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
Largest cityCincinnati
 • Total413 sq mi (1,070 km2)
 • Land406 sq mi (1,050 km2)
 • Water6.7 sq mi (17 km2)  1.6%%
 • Total830,639
 • Estimate 
826,139 Decrease
 • Density2,000/sq mi (780/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional districts1st, 2nd

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.


The southern portion of Hamilton County was originally owned and surveyed by John Cleves Symmes, and the region was a part of the Symmes Purchase. The first settlers rafted down the Ohio River in 1788 following the American Revolutionary War. They established the towns of Losantiville (later Cincinnati), North Bend, and Columbia.

Hamilton County was organized in 1790 by order of Arthur St. Clair, governor of the Northwest Territory, as the second county in the Northwest Territory. Cincinnati was named as the seat. Residents named the county in honor of Alexander Hamilton, who was the first Secretary of the Treasury of the United States and a founder of the Federalist Party. Its original boundaries were those defined for the Symmes purchase contract in 1788:[5] the Ohio River in the South, Great Miami River to the west, the Lesser Miami River to the east, and the Cayuhoga River to the North. Its area then included about one-eighth of Ohio, and had about 2,000 inhabitants (not including the remaining Native Americans). The county was greatly expanded in 1792 to include what is today the lower peninsula of Michigan. Since 1796, other counties were created from Hamilton, reducing the county to its present size.

The county was the location of much of the Northwest Indian War both before and after its organization.

The United States forcibly removed most of the Shawnee and other Indian peoples to move to locations west of the Mississippi River in the 1820s. 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.

During the Civil War, Morgan's Raid (a Confederate cavalry campaign from Kentucky) passed through the northern part of the county during the summer of 1863.


According to the U.S. Census Bureau, the county has a total area of 413 square miles (1,070 km2), of which 406 square miles (1,050 km2) is land and 6.7 square miles (17 km2) (1.6%) is water.[6]

Adjacent counties

Geographic features

Cincinnati, Ohio viewed from the SW, across the Ohio River, in Kentucky.
Cincinnati, Ohio viewed from the SW, across the Ohio River, in Kentucky.

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. No naturally occurring lakes exist, but three major manmade lakes are part of the Great Parks of Hamilton County.[7] The largest lake by far is Winton Woods Lake, covering 188 surface acres, followed by Miami Whitewater Lake, covering 85 surface acres, and Sharon Lake, covering 36 surface acres.

The county boundaries include the lowest point in Ohio, 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.[8]

The highest land elevation in Hamilton County is the Rumpke Sanitary Landfill at 1,045 feet (319 m) above sea level in Colerain Township.

Major highways


Historical population
Census Pop.
2021 (est.)826,139[9]−0.5%
U.S. Decennial Census[10]
1790-1960[11] 1900-1990[12]
1990-2000[13] 2010-2020[14]

2000 census

As of the 2000 census, there were 845,303 people, 346,790 households, and 212,582 families living 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 69.2% White, 26.0% Black or African American, 0.1% Native American, 2.3% Asian, 0.01% Pacific Islander, 0.51% from other races, and 2.2% from two or more races. 2.8% 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.

Hamilton County property value, dollars per square foot-2011
Hamilton County property value, dollars per square foot-2011

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.

2010 census

As of the 2010 census, there were 802,374 people, 333,945 households, and 197,571 families living in the county.[15] The population density was 1,976.7 inhabitants per square mile (763.2/km2). There were 377,364 housing units at an average density of 929.7 per square mile (359.0/km2).[16] The racial makeup of the county was 68.8% white, 25.7% black or African American, 2.0% Asian, 0.2% American Indian, 0.1% Pacific islander, 1.1% from other races, and 2.1% from two or more races. Those of Hispanic or Latino origin made up 2.6% of the population.[15] In terms of ancestry, 31.0% were German, 14.7% were Irish, 7.7% were English, and 6.6% were American.[17]

Of the 333,945 households, 29.7% had children under the age of 18 living with them, 39.4% were married couples living together, 15.4% had a female householder with no husband present, 40.8% were non-families, and 33.9% of all households were made up of individuals. The average household size was 2.34 and the average family size was 3.04. The median age was 37.1 years.[15]

The median income for a household in the county was $48,234 and the median income for a family was $64,683. Males had a median income of $48,344 versus $37,310 for females. The per capita income for the county was $28,799. About 11.1% of families and 15.4% of the population were below the poverty line, including 22.9% of those under age 18 and 9.0% of those age 65 or over.[18]


The county's highest population was recorded in the 1970 U.S. Census. Since then, the county has lost population at an average rate of three percent per decade. Although Hamilton County is experiencing a decline in birth rates and has higher death rates in older age groups (cohorts), out-migration of residents is the key factor in population loss. In the last decade, this population loss has been reversed, and it is estimated that both Hamilton County and the City of Cincinnati have grown their populations. [19] The Cincinnati Metropolitan Statistical Area, over the last three decades has seen a 19 percent increase in population. Much of the region's growth has been through movement of Cincinnati and Hamilton County residents into neighboring counties.[19]


As of 2020, the members of the Hamilton Board of County Commissioners are Denise Driehaus, Stephanie Summerow Dumas, and Alicia Reece.[20]

Since 1963, the Board has employed an administrator to run the day-to-day operations of the county; the current administrator is Jeffrey Aluotto.[21] Other elected officers include Dusty Rhodes (Auditor), Joe Deters (Prosecutor), Charmaine McGuffey (Sheriff), Eric Beck (Engineer), Scott Crowley (Recorder), Jill Schiller (Treasurer), and Lakshmi Sammarco (Coroner).[21]

As of 2021, the elected Common Pleas Court include: Judge Jody Luebbers, Judge Lisa Allen, Judge Jennifer Branch, Judge Wende Cross, Judge Leslie Ghiz, Judge Robert Goering, Judge Tom Heekin, Judge Christian Jenkins, Judge Charles Kubicki, Judge Melba Marsh, Judge Terry Nestor, Judge Robert Ruehlman, Judge Nicole Sanders, Judge Megan Shanahan, Judge Alan Triggs, and Judge Christopher Wagner.[22]


Hamilton County was historically rather conservative for an urban county. It long favored Republican candidates in national elections, but has trended Democratic in recent years. In 2008, Barack Obama was the first Democratic presidential candidate to win the county since 1964, and only the second since 1936. The county continued to lean Democratic, voting for Obama again in 2012 and for Democratic candidate Hillary Clinton in 2016. In fact, it was one of the few counties in Ohio to swing toward the Democrats in 2016 even as the state as a whole swang toward the Republicans.

In other state elections, the county also tended to favor Republican candidates. Richard Cordray in his failed 2018 bid was the first Democrat to win the county in a gubernatorial election since Dick Celeste in 1982, and only the second since Michael DiSalle in 1958.[23][24] In Senate elections, the county also tended to back Republicans, but has been won by Frank Lausche in 1962, John Glenn in all four of his elections and both Howard Metzenbaum and Sherrod Brown in two out of three elections for both (1982 and 1988, and 2012 and 2018).[25] In 2006, both Ted Strickland and Sherrod Brown lost the county by less than 2,000 votes while winning statewide by 24 and 12 points, respectively.

With the election of Democrat Stephanie Summerow Dumas in 2018 midterm elections, the Hamilton County Board of Commissioners was entirely Democratic for the first time ever.[26] Democrats had previously regained majority control of the Board of Commissioners in 2016 with the election of Denise Driehaus. In 2019, longtime Democratic Commissioner Todd Portune announced his resignation from the Board due to health problems. Portune's Chief of Staff, Victoria Parks, was appointed to serve the remainder of his term (through the November 2020 general election). With Parks' appointment, the Board of Commissioners became for the first time all-female and majority Black.[27] In the November 2020 election, Democrat Alicia Reece was elected to fill Parks' seat, thereby retaining the Board's status as all-female and majority Black.[20]

Historically, due to its tight races and its position in the swing state of Ohio, Hamilton County was regarded as a crucial county to win in presidential elections. In 2012, The Washington Post named Hamilton as one of the seven most important counties in the country for that year's election.[28] Time characterized Hamilton County's political scene as "a battle between conservative suburbs and a Democratic urban center, though Cincinnati is one of the most conservative metro areas in the Midwest."[29] Those characterizations became less true in recent years. While many of Cincinnati's western suburbs, like Green and Delhi Townships, continue to strongly support Republican candidates, the city itself and most of its northern suburbs vote strongly Democratic.

United States presidential election results for Hamilton County, Ohio[30]
Year Republican Democratic Third party
No.  % No.  % No.  %
2020 177,886 41.28% 246,266 57.15% 6,777 1.57%
2016 173,665 42.45% 215,719 52.73% 19,725 4.82%
2012 193,326 46.15% 219,927 52.50% 5,641 1.35%
2008 195,530 46.00% 225,213 52.98% 4,343 1.02%
2004 222,616 52.50% 199,679 47.09% 1,730 0.41%
2000 204,175 54.03% 161,578 42.76% 12,146 3.21%
1996 186,493 50.12% 160,458 43.13% 25,117 6.75%
1992 192,447 47.70% 148,409 36.79% 62,564 15.51%
1988 227,004 61.29% 140,354 37.89% 3,026 0.82%
1984 246,288 63.34% 140,350 36.10% 2,177 0.56%
1980 206,979 57.73% 129,114 36.01% 22,448 6.26%
1976 211,267 59.84% 135,605 38.41% 6,207 1.76%
1972 239,212 65.65% 119,054 32.67% 6,119 1.68%
1968 183,611 50.24% 135,057 36.95% 46,815 12.81%
1964 161,179 44.73% 199,127 55.27% 0 0.00%
1960 211,068 54.50% 176,215 45.50% 0 0.00%
1956 222,009 66.11% 113,797 33.89% 0 0.00%
1952 207,690 59.60% 140,785 40.40% 0 0.00%
1948 151,055 52.37% 135,290 46.91% 2,068 0.72%
1944 154,960 51.75% 144,470 48.25% 0 0.00%
1940 154,733 50.96% 148,907 49.04% 0 0.00%
1936 108,506 38.69% 153,117 54.60% 18,813 6.71%
1932 118,804 47.70% 123,109 49.43% 7,163 2.88%
1928 147,534 57.03% 110,151 42.58% 1,007 0.39%
1924 115,950 60.70% 34,916 18.28% 40,163 21.02%
1920 112,590 57.16% 77,598 39.40% 6,778 3.44%
1916 64,030 53.33% 51,990 43.30% 4,049 3.37%
1912 42,119 38.31% 42,909 39.03% 24,921 22.67%
1908 63,803 56.49% 45,429 40.22% 3,714 3.29%
1904 65,129 66.43% 24,936 25.44% 7,973 8.13%
1900 55,466 56.88% 40,228 41.25% 1,821 1.87%
1896 57,749 59.86% 38,165 39.56% 561 0.58%
1892 41,963 51.15% 38,392 46.80% 1,685 2.05%
1888 41,507 51.50% 37,661 46.73% 1,423 1.77%
1884 38,744 53.45% 33,248 45.87% 494 0.68%
1880 35,173 53.76% 30,122 46.04% 133 0.20%
1876 28,869 49.46% 29,451 50.46% 43 0.07%
1872 20,083 44.60% 24,941 55.39% 1 0.00%
1868 24,167 56.29% 18,768 43.71% 0 0.00%
1864 22,833 57.89% 16,606 42.11% 0 0.00%
1860 16,182 45.37% 15,431 43.27% 4,051 11.36%
1856 9,345 33.28% 13,051 46.48% 5,685 20.25%

Hamilton County Officials[31]

Office Officeholder Party
County Commissioner Stephanie Summerow Dumas Democratic
County Commissioner Alicia Reece Democratic
County Commissioner Denise Driehaus  Democratic
Auditor Dusty Rhodes Democratic
Clerk of Courts Pavan Parikh Democratic
Coroner Lakshmi Kode Sammarco Democratic
Engineer Eric Beck Republican
Prosecutor Joe Deters Republican
Recorder Scott Crowley Democratic
Sheriff Charmaine McGuffey Democratic
Treasurer Jill Schiller Democratic

Ohio House of Representatives

District Representative Party
27 Tom Brinkman Republican
28 Jessica Miranda Democratic
29 Cindy Abrams Republican
30 Bill Seitz Republican
31 Brigid Kelly Democratic
32 Catherine Ingram Democratic
33 Sedrick Denson Democratic

Ohio State Senate

District Senator Party
7 Steve Wilson Republican
8 Louis Blessing Republican
9 Cecil Thomas Democratic

United States House of Representatives

District Representative Party
1 Steve Chabot Republican
2 Brad Wenstrup Republican

United States Senate

Senator Party
Sherrod Brown Democratic
Rob Portman Republican


K-12 education

School districts in Hamilton County
School districts in Hamilton County

Public elementary and secondary education is provided by 23 school districts:[32]

In 2016, Cincinnati Public Schools had 35,000 students, 63% of which were African-American.[33] The county also has a vocational school district, the Great Oaks Institute of Technology and Career Development. 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 school system in the United States.

Colleges and universities

The University of Cincinnati was founded in 1819; The Engineering Research Center, designed by UC Alumnus Michael Graves, was designed to look like a 4-cylinder engine.
The University of Cincinnati was founded in 1819; The Engineering Research Center, designed by UC Alumnus Michael Graves, was designed to look like a 4-cylinder engine.


Major highways

Interstate 71, Interstate 74, Interstate 75, Interstate 471 and Interstate 275 serve the county. The Norwood Lateral and Ronald Reagan Cross County Highway are also prominent east–west thoroughfares in the county.


CSX Transportation, Norfolk Southern, RailAmerica, and Amtrak.[34]


Miami Whitewater Forest was the second park to join the Great Parks of Hamilton County in 1949; it now spans 4,279 acres.
Miami Whitewater Forest was the second park to join the Great Parks of Hamilton County in 1949; it now spans 4,279 acres.

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 Great Parks of Hamilton County 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. The Hamilton County Fair is the oldest county fair in Ohio.


Map of Hamilton County, Ohio, with independent cities and villages in gray, and townships in colors
Map of Hamilton County, Ohio, with independent cities and villages in gray, and townships in colors




The following list includes townships that have existed within present-day Hamilton County, including those that no longer exist or remain only as paper townships. It does not include townships that became part of Butler, Warren, Clermont, Montgomery, and other counties.

Census-designated places

Unincorporated communities

Neighborhoods of Cincinnati

See also


  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". 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.
  5. ^ However, the Symmes purchase was later reduced to just the southern 1/3 of the original tract.
  6. ^ "2010 Census Gazetteer Files". United States Census Bureau. August 22, 2012. Archived from the original on May 4, 2014. Retrieved February 8, 2015.
  7. ^ Hamilton County Water Resources
  8. ^ "Markland". United States Army Corps of Engineers: Louisville District. Archived from the original on December 12, 2012.
  9. ^ "Annual Estimates of the Resident Population for Counties: April 1, 2020 to July 1, 2021". Retrieved June 26, 2022.
  10. ^ "U.S. Decennial Census". United States Census Bureau. Retrieved February 8, 2015.
  11. ^ "Historical Census Browser". University of Virginia Library. Retrieved February 8, 2015.
  12. ^ Forstall, Richard L., ed. (March 27, 1995). "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved February 8, 2015.
  13. ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. April 2, 2001. Retrieved February 8, 2015.
  14. ^ Wetterich, Chris (March 26, 2015). "How much has Greater Cincinnati grown in population during this decade?". Cincinnati Business Courier. Archived from the original on April 2, 2015. Retrieved March 1, 2020.
  15. ^ a b c "DP-1 Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved December 27, 2015.
  16. ^ "Population, Housing Units, Area, and Density: 2010 - County". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved December 27, 2015.
  17. ^ "DP02 SELECTED SOCIAL CHARACTERISTICS IN THE UNITED STATES – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved December 27, 2015.
  18. ^ "DP03 SELECTED ECONOMIC CHARACTERISTICS – 2006-2010 American Community Survey 5-Year Estimates". United States Census Bureau. Archived from the original on February 13, 2020. Retrieved December 27, 2015.
  19. ^ a b "Population COMMUNITY COMPASS REPORT NO. 15-1". Hamilton County Regional Planning Commission. 2004. Retrieved March 1, 2020.
  20. ^ a b WKRC (January 2, 2021). "New Hamilton County Commissioner Alicia Reese takes office". WKRC. Retrieved January 26, 2021.
  21. ^ a b "Government". Retrieved January 26, 2021.
  22. ^ "Hamilton County Common Pleas Judges". Retrieved January 16, 2020.
  23. ^ "1982 Gubernatorial General Election Results - Ohio".
  24. ^ "1958 Gubernatorial General Election Results - Ohio".
  25. ^ "Our Campaigns - OH US Senate Race - November 6, 1962". Retrieved April 19, 2022.
  26. ^ Rinehart, Bill. "New Hamilton County Commission Will Be One Of Firsts". Retrieved January 16, 2020.
  27. ^ London, John (January 14, 2020). "Hamilton County has first all-female commission". WLWT. Retrieved January 16, 2020.
  28. ^ Blake, Aaron (November 6, 2012). "The 7 most important counties in Election 2012". The Washington Post. Retrieved January 23, 2018.
  29. ^ Altman, Alex (October 29, 2012). "The Keys to Ohio: Five Counties that Could Decide the Presidency". Time. Retrieved January 23, 2018.
  30. ^ Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". Retrieved May 2, 2018.
  32. ^ "2020 CENSUS - SCHOOL DISTRICT REFERENCE MAP: Hamilton County, OH" (PDF). U.S. Census Bureau. Retrieved July 23, 2022. - Text list - The Census Bureau includes all districts with any territory, no matter how slight
    See also: "School Districts". Hamilton County, Ohio. Retrieved March 1, 2020.
  33. ^ "CPS History | Cincinnati Public Schools".
  34. ^ Railroads of Cincinnati

External links

This page was last edited on 23 July 2022, at 17:32
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