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Warren County, Ohio facts for kids

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Warren County
Warren County Administration Building in Lebanon, Ohio
Warren County Administration Building in Lebanon, Ohio
Official seal of Warren County
Map of Ohio highlighting Warren 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 May 1, 1803
Named for Dr. Joseph Warren
Seat Lebanon
Largest city Mason
 • Total 407 sq mi (1,050 km2)
 • Land 401 sq mi (1,040 km2)
 • Water 6.0 sq mi (16 km2)  1.5%%
 • Total 242,337 Increase
Time zone UTC−5 (Eastern)
 • Summer (DST) UTC−4 (EDT)
Congressional district 1st

Warren County is a county located in the southwestern part of the U.S. state of Ohio. As of the 2020 census, the population was 242,337. Its county seat is Lebanon. The county is one of Ohio’s most affluent, with the county median income the highest of Ohio’s 88 counties. The county was created on May 1, 1803 from Hamilton County; it is named for Dr. Joseph Warren, a hero of the Revolution who sent Paul Revere and the overlooked William Dawes on their famous rides and who died at the Battle of Bunker Hill. Warren County is part of the Cincinnati, OH-KY-IN Metropolitan Statistical Area.


According to the U.S. Census Bureau, the county has a total area of 407 square miles (1,050 km2), of which 401 square miles (1,040 km2) is land and 6.0 square miles (16 km2) (1.5%) is water. The county is a rough square with the sides roughly 20 miles (30 km) long.

Adjacent counties


Warren County was created by the first Ohio General Assembly in the Act of March 24, 1803, which also created Butler and Montgomery Counties. The act defined Warren County as "all that part of the county of Hamilton included within the following bounds, viz.: Beginning at the northeast corner of the county of Clermont, running thence west with the line of said county to the Little Miami; thence up the same with the meanders thereof to the north boundary of the first tier of sections in the second entire range of townships in the Miami Purchase; thence west to the northeast corner of Section No. 7 in the third township of the aforesaid range; thence north to the Great Miami; thence up the same to the middle of the fifth range of townships; thence east to the County line; thence with same south to the place of beginning." Originally this included land now in Clinton County as far east as Wilmington.

Clinton County proved a continuing headache to the legislature. The Ohio Constitution requires that every county have an area of at least four hundred square miles (1,036 km²). Clinton County's boundaries were several times adjusted in an effort to comply with that clause of the constitution. One of them, the Act of January 30, 1815, detached a strip of land from the eastern side to give to Clinton. That would have left Warren under four hundred square miles (1,036 km²), so a portion of Butler County (the part of Franklin Township where Carlisle is now located) was attached to Warren in compensation. The 1815 act was as follows:

  • Section 1—That all that part of the county of Butler lying and being within the first and second fractional townships in the fifth range, and adjoining the south line of Montgomery County, shall be and the same is hereby attached to and made part of the county of Warren.
  • Section 2—That eleven square miles 28 km² of the territory of the county of Warren and extending parallel to the said eastern boundary of Warren County, along the whole length of such eastern boundary from north to south, shall be and the same is hereby attached to and made a part of the county of Clinton."

Except for the sections formed by the Great and Little Miamis, the sides are all straight lines.

Lakes and rivers

The major rivers of the county are the Great Miami River, which flows through the northwest corner of the county in Franklin Township, and the Little Miami River which zig-zags across the county from north to south. There is one sizable lake, the Caesars Creek Reservoir, created by a U.S. Army Corps of Engineers dam on Caesars Creek in the northeast part of the county in Massie Township.


Historical population
Census Pop.
1810 9,925
1820 17,837 79.7%
1830 21,468 20.4%
1840 23,141 7.8%
1850 25,560 10.5%
1860 26,902 5.3%
1870 26,689 −0.8%
1880 28,392 6.4%
1890 25,468 −10.3%
1900 25,584 0.5%
1910 24,497 −4.2%
1920 25,716 5.0%
1930 27,348 6.3%
1940 29,894 9.3%
1950 38,505 28.8%
1960 65,711 70.7%
1970 84,925 29.2%
1980 99,276 16.9%
1990 113,909 14.7%
2000 158,383 39.0%
2010 212,693 34.3%
2020 242,337 13.9%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2020

2010 census

As of the 2010 United States Census, there were 212,693 people, 76,424 households, and 57,621 families residing in the county. The population density was 530.0 inhabitants per square mile (204.6/km2). There were 80,750 housing units at an average density of 201.2 per square mile (77.7/km2). The racial makeup of the county was 90.5% white, 3.9% Asian, 3.3% black or African American, 0.2% American Indian, 0.7% from other races, and 1.5% from two or more races. Those of Hispanic or Latino origin made up 2.2% of the population. In terms of ancestry, 28.7% were German, 14.1% were Irish, 12.0% were English, 11.6% were American, and 5.0% were Italian.

Of the 76,424 households, 40.1% had children under the age of 18 living with them, 62.6% were married couples living together, 8.8% had a female householder with no husband present, 24.6% were non-families, and 20.4% of all households were made up of individuals. The average household size was 2.70 and the average family size was 3.14. The median age was 37.8 years.

The median income for a household in the county was $71,274 and the median income for a family was $82,090. Males had a median income of $61,091 versus $41,331 for females. The per capita income for the county was $31,935. About 4.7% of families and 6.0% of the population were below the poverty line, including 7.6% of those under age 18 and 5.2% of those age 65 or over.



  • I-71.svg Interstate 71
  • I-75.svg Interstate 75
  • US 22.svg U.S. Route 22
  • US 42.svg U.S. Route 42
  • OH-3.svg State Route 3
  • OH-28.svg State Route 28
  • OH-48.svg State Route 48
  • OH-63.svg State Route 63
  • OH-73.svg State Route 73
  • OH-122.svg State Route 122
  • OH-123.svg State Route 123
  • OH-132.svg State Route 132
  • OH-350.svg State Route 350
  • OH-741.svg State Route 741


Warren County has one public airport, designated as Lebanon-Warren County Airport (I68). The runway is a 4502' x 65' paved and lighted North-South runway (01/19), and parallel taxiway. Navigation and communications equipment includes PAPI, AWOS, Pilot Controlled Lighting, and UNICOM. The airport runway, taxiway, and navigation equipment is owned by the County. The county leases a public terminal, but other facilities are privately owned and operated under contract by a Fixed-base operator. The airport serves general and business aviation, but has no commercial airlines.

There are also two privately owned operating airports in the county; Waynesville airport, also known as Red Stewart Field (40I), and Caesar Creek Gliderport (2OH9), both with grass runways. Operations have ceased at two former private paved runway airports, Brownie's Lebanon Airport (19I), and Lebanon San Mar Gale (OH79).

Rail and Bus

Warren County does not have passenger train service except for a scenic train that runs between Lebanon and Mason. Freight trains still serve Carlisle, and on a limited basis, Monroe, Mason, and Lebanon. Historically, there have been several trains that ran through the county whose stops became cities and villages. These trains include the Cincinnati, Lebanon and Northern Railway, the Middletown and Cincinnati Railroad, and the Little Miami Railroad whose path is now replaced by the Little Miami Bike Trail. There have been proposals to run commuter trains from Cincinnati to the Kings Island area, but none have ever found sufficient support or funding.

There is no public bus transportation based in Warren County, but there is limited service from Cincinnati to Mason and Kings Island. Middletown also runs bus service to eastern portions of Middletown that are in Warren County.


There are no commercially navigable waterways in Warren County, but the Warren County Canal did operate in the 19th century as a branch of the Miami and Erie Canal, bringing freight to Lebanon by canal boat. Recreationally, the Little Miami River can be traveled by canoe or kayak for its length through the county, and motorized boating can be done at Caesar's Creek Lake.

Recreation and attractions

  • Kings Island: Theme park
  • Western & Southern Open: Professional tennis tournament
  • The Beach Water Park: Outdoor water park
  • Great Wolf Lodge: Indoor water park resort
  • Ozone Zipline Adventures: Ziplines ranging from 250 feet to 1300 feet
  • Lebanon Mason Monroe Railroad: Nostalgic, themed train rides
  • Fort Ancient: American Indian earthen mounds
  • Caesar's Creek State Park and Caesar's Creek Lake
  • Caesar's Creek Pioneer Village
  • Little Miami Scenic Trail: Scenic bike trail
  • Lebanon Countryside Trail
  • The Golden Lamb: Ohio's oldest continuously operating inn
  • La Comedia Dinner Theatre: Professional dinner theater
  • Morgan's Canoe Livery: Canoe rental on Little Miami National Scenic River
  • Bella Balloons & Gentle Breeze Balloons: Balloon sightseeing tours
  • Vertical Advantage Helicopters: Helicopter sightseeing tours
  • Start Skydiving: Skydiving
  • Red Stewart Airfield: Airplane sightseeing tours from a grass-strip airfield
  • Cincinnati AVP Open: Professional beach volleyball tournament
  • Warren County Historical Society Museum
  • Glendower State Memorial
  • Lebanon Raceway
  • Ohio Renaissance Festival
  • Lebanon Horse-Drawn Carriage Parade & Festival
  • The Christmas Ranch


Map of Warren County Ohio With Municipal and Township Labels
Map of Warren County, Ohio with municipal and township labels




  • Clearcreek
  • Deerfield
  • Franklin
  • Hamilton
  • Harlan
  • Massie
  • Salem
  • Turtlecreek
  • Union
  • Washington
  • Wayne

Census-designated places

Unincorporated communities


Warren County is home to the Mason Business Center, a 2-million-square-foot (0.19 km2) research and development facility for Procter and Gamble (P&G), whose global headquarters are located in downtown Cincinnati. Originally built in 1995 after three years of construction, P&G recently completed expansion of a new 500,000-square-foot (46,000 m2) Beauty and Innovation Center in 2019, adding an additional 1,000 jobs for a total of 2,800 employees at the site. Mason is also home to the corporate headquarters of LensCrafters.

Top Employers

According to the county's 2019 Comprehensive Annual Financial Report, the top employers in the county are:

# Employer # of employees
1 Procter and Gamble 3,036
2 Macy's Credit and Customer Service 2,250
3 LensCrafters 1,853
4 Cintas 1,512
5 Wellpoint 1,300
6 Anthem Blue Cross and Blue Shield 1,300
7 Warren County 1,276
8 Atrium Medical Center 1,200
9 Mason City Schools 1,184
10 Huma Care 1,000


Public school districts

  • Blanchester City School District (also in Brown, Clermont, and Clinton)
  • Carlisle Local School District (also in Montgomery)
    • Carlisle High School, Carlisle (the Indians)
  • Clinton-Massie Local School District (also in Clinton)
  • Franklin City School District
    • Franklin High School, Franklin (the Wildcats)
  • Goshen Local School District (also in Clermont)
  • Kings Local School District
    • Kings High School, Kings Mills (the Knights)
  • Lebanon City School District
    • Lebanon High School, Lebanon (the Warriors)
  • Little Miami Local School District (also in Clermont)
    • Little Miami High School, Morrow (the Panthers)
  • Loveland City School District (also in Clermont and Hamilton)
  • Mason City School District
    • William Mason High School, Mason (the Comets)
  • Middletown City School District (also in Butler)
  • Monroe Local School District (also in Butler)
  • Princeton City School District (also in Butler and Hamilton)
  • Springboro Community City School District (also in Montgomery)
    • Springboro High School, Springboro (the Panthers)
  • Wayne Local School District
    • Waynesville High School, Waynesville (the Spartans)
  • Warren County Vocational School District
    • Warren County Career Center, Lebanon
  • Xenia City School District (also in Greene and Clinton)

Private schools

  • Bishop Fenwick High School – Franklin
  • Lebanon Christian School – Lebanon
  • Mars Hill Academy - Mason
  • Middletown Christian Schools – Franklin
  • St. Margaret of York School – Loveland
  • Liberty Bible Academy – Mason
  • St. Susanna Parish School – Mason
  • Royalmont Academy – Mason
  • St. Francis de Sales – Lebanon
  • CinDay Academy - Springboro

Virtual schools

  • Warren County Virtual Community School

Vocational schools

  • Warren County Career Center Website

Colleges and universities

Warren County has no native colleges or universities, but was the original site selected for Miami University which instead located in Oxford, Ohio in 1809. National Normal University, a teachers college, was in Lebanon from 1855 until 1917 when it closed. Several colleges offer classes in Warren County at various locations, including Sinclair Community College of Dayton, the University of Cincinnati, and Wilmington College. Sinclair opened a branch in the Mason area in 2007. The University of Cincinnati owns 398 acres (1.61 km2) of land at the intersections of I-71 and Wilmington road, but no plans for development on the site have been announced.


The county has six public libraries:

  • Franklin Public Library - Franklin
  • Lebanon Public Library - Lebanon
  • Mary L. Cook Public Library – Waynesville
  • Mason Public Library - Mason
  • Salem Township Public Library - Morrow
  • Springboro Public Library - Springboro

Notable natives and residents

  • Neil Armstrong, Astronaut
  • Robert Benham, Pioneer politician
  • Clarence Brown, Jr., Congressman
  • John Chivington, Civil War officer
  • Thomas Corwin, Governor
  • Brant Daugherty, Actor
  • William H. P. Denny, Newspaper publisher
  • Clifford B. Harmon, Aviator
  • Woody Harrelson, Actor
  • Cordell Hull, Secretary of State
  • Bruce E. Ivins, Scientist
  • Michael Larson, Game-show contestant
  • Donald Lukens, Congressman
  • William C. McClintock, Newspaper publisher
  • John McLean, U.S. Supreme Court justice
  • Jeremiah Morrow, Governor
  • Marcus Mote, Early Ohio Artist
  • Anthony Muñoz, NFL player
  • Corwin M. Nixon, Ohio State Representative (1962-1992), Ohio House of Representatives Minority Leader (1979-1992)
  • Dan Patrick, Sports broadcaster
  • Marty Roe, Musician
  • Thomas Ross, Congressman
  • Larry Sparks, Musician
  • Wilson E. Terry, Spanish–American War soldier
  • Durbin Ward, Civil War general
  • Mark Whitacre, FBI informant, Inspiration for the book and movie The Informant!
  • Joseph Whitehill, Ohio state treasurer
  • Steve Wilson, Ohio State Senator

See also

Kids robot.svg In Spanish: Condado de Warren (Ohio) para niños

National Hispanic Heritage Month on Kiddle
Contemporary Hispanic artists
Firelei Báez
Coco Fusco
Diana Guerrero-Maciá
Harmonia Rosales
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