kids encyclopedia robot

Clinton County, Ohio facts for kids

Kids Encyclopedia Facts
Quick facts for kids
Clinton County
Official seal of Clinton County
Map of Ohio highlighting Clinton County
Location within the U.S. state of Ohio
Map of the United States highlighting Ohio
Ohio's location within the U.S.
Country  United States
State  Ohio
Founded March 1, 1810
Named for George Clinton
Seat Wilmington
Largest city Wilmington
 • Total 412 sq mi (1,070 km2)
 • Land 409 sq mi (1,060 km2)
 • Water 3.6 sq mi (9 km2)  0.9%%
 • Total 42,018
 • Density 101.99/sq mi (39.38/km2)
Time zone UTC−5 (Eastern)
 • Summer (DST) UTC−4 (EDT)
Congressional district 15th

Clinton County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 42,018. The county seat is Wilmington. The county is named for former U.S. Vice President George Clinton.

Clinton County comprises the Wilmington, Ohio Micropolitan Statistical Area, which is also included in the Cincinnati-Wilmington-Maysville, OH-KY-IN Combined Statistical Area.


Clinton County was formed on February 19, 1810 from sections of Highland County and Warren County. It was named after George Clinton, a soldier, politician, Governor of New York, and Vice President of the United States. According to The Descendants of William Sabin, compiled by Gordon Alan Morris, Thomas J. Prittie, and Dixie Prittie, one of the first Caucasian children born in the county was Mary Stuart Sabin, daughter of Dr. Warren Sabin, c. 1812. Genealogical records also indicate Williston T. Mendenhall was born in Clarksville, Clinton County on 24 November 1811.


According to the U.S. Census Bureau, the county has a total area of 412 square miles (1,070 km2), of which 409 square miles (1,060 km2) is land and 3.6 square miles (9.3 km2) (0.9%) is water.

The entire county lies within the Little Miami River watershed, with the exception of extreme eastern areas, which are within the Scioto River watershed. Clinton County lies within the till plains physiographic region, and is somewhat flat or gently rolling. The northern two thirds of the county were covered with an ice sheet during the Wisconsinan Stage, while the southern third was covered by ice sheets during the much older Illinoian Stage. Because of such a history with ice, glacial features are readily found on the landscape, such as moraines and kames.

The general elevation of the county is roughly 1,050 feet (320 m) above sea level, and there are few areas in the county that deviate from this more than 200 feet (61 m).

The climate of Clinton County can be classified as humid continental. It is one of the coolest and wettest counties in southern Ohio, although differences between it and other southern Ohio counties are usually very slight. Clinton County averages 42 inches (1,100 mm) of precipitation per year, including 30 inches (760 mm) of snow (Note: 1 inch of snow does not equal one inch of precipitation). Average July high temperatures reach the mid and upper 80s F although temperatures above 90 F are common, while lows are typically in the 60s F. January high temperatures typically reach the low and mid 30s F, while lows generally bottom out in the 10s F, although lows in the single digits and even below 0 F are common.

Interstate 71 crosses the northern third of the county, trending northeast to southwest and connecting Clinton County to Columbus, Ohio and Cincinnati. Clinton County is part of the Cincinnati-Middletown-Wilmington Combined Statistical Area, although there is little true urban activity in the county. U.S. Route 68 is the major north-south route through the county, while U.S. Route 22 runs east-west. Several other state and local highways serve the residents of Clinton County.

Adjacent counties


Historical population
Census Pop.
1810 2,674
1820 8,085 202.4%
1830 11,436 41.4%
1840 15,719 37.5%
1850 18,838 19.8%
1860 21,461 13.9%
1870 21,914 2.1%
1880 24,756 13.0%
1890 24,240 −2.1%
1900 24,202 −0.2%
1910 23,680 −2.2%
1920 23,036 −2.7%
1930 21,547 −6.5%
1940 22,574 4.8%
1950 25,572 13.3%
1960 30,004 17.3%
1970 31,464 4.9%
1980 34,603 10.0%
1990 35,415 2.3%
2000 40,543 14.5%
2010 42,040 3.7%
2020 42,018 −0.1%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2020

2010 census

As of the 2010 United States Census, there were 42,040 people, 16,210 households, and 11,364 families living in the county. The population density was 102.9 inhabitants per square mile (39.7/km2). There were 18,133 housing units at an average density of 44.4 per square mile (17.1/km2). The racial makeup of the county was 94.7% white, 2.2% black or African American, 0.5% Asian, 0.2% American Indian, 0.5% from other races, and 1.9% from two or more races. Those of Hispanic or Latino origin made up 1.3% of the population. In terms of ancestry, 26.4% were German, 15.4% were Irish, 12.0% were American, and 11.9% were English.

Of the 16,210 households, 33.5% had children under the age of 18 living with them, 52.9% were married couples living together, 11.9% had a female householder with no husband present, 29.9% were non-families, and 25.1% of all households were made up of individuals. The average household size was 2.52 and the average family size was 2.99. The median age was 38.7 years.

The median income for a household in the county was $46,261 and the median income for a family was $56,208. Males had a median income of $42,134 versus $31,380 for females. The per capita income for the county was $22,163. About 11.2% of families and 14.0% of the population were below the poverty line, including 18.6% of those under age 18 and 7.9% of those age 65 or over.


Clinton County is home to Cowan Lake State Park, where outdoor recreationalists enjoy fishing, swimming, boating, hiking, bicycling, camping, and wildlife viewing. The northwestern border of Clinton County is formed by Caesar Creek Lake, which is part of Caesar Creek State Park. Fossil hunting is popular here, in addition to similar activities enjoyed at Cowan Lake. Wilmington College in Wilmington has several NCAA Division III athletic programs, whose events can be attended by the public. The city is also the home of the Clinton County Corn Festival.

In terms of professional sports, Clinton County is firmly within the Cincinnati market. Many residents are supporters of the baseball Cincinnati Reds and football Cincinnati Bengals. Cincinnati is a one-hour or less drive away for nearly all Clinton County residents.


Map of Clinton County Ohio With Municipal and Township Labels
Map of Clinton County, Ohio With Municipal and Township Labels




  • Adams
  • Chester
  • Clark
  • Green
  • Jefferson
  • Liberty
  • Marion
  • Richland
  • Union
  • Vernon
  • Washington
  • Wayne
  • Wilson

Unincorporated communities

Ghost town


The following school districts have territory in Clinton County. Those primarily in Clinton are in bold, those primarily in other counties are in italics. The county a district is primarily located in is bolded.

  • Blanchester Local School District (also in Brown, Clermont, and Warren)
  • Clinton-Massie Local School District (also in Warren)
  • East Clinton Local School District (also in Fayette, Greene, and Highland)
  • Fairfield Local School District (also in Highland)
  • Fayetteville-Perry Local School District (also in Brown)
  • Greeneview Local School District (also in Greene)
  • Lynchburg-Clay Local School District (also in Highland)
  • Miami Trace Local School District (also in Fayette)
  • Wilmington City School District (also in Greene)
  • Xenia Community School District (also in Greene and Warren)
kids search engine
Clinton County, Ohio Facts for Kids. Kiddle Encyclopedia.