Clark County, Ohio

Clark County is a in the  of Ohio. As of the, the population was 138,333. Its county seat is Springfield. The county was created on March 1, 1818. It was for General George Rogers Clark, a hero of the.

Clark County comprises the Springfield, OH, which is also included in the Dayton-Springfield-Sidney-OH.

Geography
According to the, the county has a total area of 403 sqmi, of which 397 sqmi, is land and 5.1 sqmi (1.3%) is water. It is the third-smallest county in Ohio by total area.

Adjacent counties

 * Champaign County (north)
 * Madison County (east)
 * Greene County (south)
 * Montgomery County (southwest)
 * Miami County (west)

2000 census
As of the of 2000, there were 144,742 people, 56,648 households, and 39,370 families residing in the county. The was 362 PD/sqmi(140/km²). There were 61,056 housing units at an average density of 153 /sqmi. The racial makeup of the county was 88.12% White, 8.95% Black or African American, 0.28% Native American, 0.53% Asian, 0.02% Pacific Islander, 0.53% from other races, and 1.58% from two or more races. 1.17% of the population were Hispanic or Latino of any race. 23.8% were of, 21.6% American, 10.4% and 8.7%  ancestry according to Census 2000.

There were 56,648 households out of which 31.40% had children under the age of 18 living with them, 52.60% were living together, 12.80% had a female householder with no husband present, and 30.50% were non-families. 26.00% of all households were made up of individuals and 11.10% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 2.97.

In the county, the population was spread out with 25.10% under the age of 18, 9.10% from 18 to 24, 26.80% from 25 to 44, 24.30% from 45 to 64, and 14.70% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 92.50 males. For every 100 females age 18 and over, there were 88.60 males.

The median income for a household in the county was $40,340, and the median income for a family was $48,259. Males had a median income of $37,157 versus $24,688 for females. The for the county was $19,501. About 7.90% of families and 10.70% of the population were below the, including 14.90% of those under age 18 and 8.20% of those age 65 or over.

2010 census
As of the, there were 138,333 people, 55,244 households, and 36,906 families residing in the county. The population density was 348.0 PD/sqmi. There were 61,419 housing units at an average density of 154.5 /sqmi. The was 348.0 PD/sqmi. There were 61,419 housing units at an average density of 362 /sqmi. The racial makeup of the county was 86.3% white, 8.8% black or African American, 0.6% Asian, 0.3% American Indian, 1.4% from other races, and 2.5% from two or more races. Those of Hispanic or Latino origin made up 2.8% of the population. In terms of ancestry, 25.3% were, 15.0% were , 13.8% were American, and 10.5% were.

Of the 55,244 households, 31.1% had children under the age of 18 living with them, 47.5% were living together, 14.1% had a female householder with no husband present, 33.2% were non-families, and 27.7% of all households were made up of individuals. The average household size was 2.45 and the average family size was 2.96. The median age was 40.5 years.

The median income for a household in the county was $44,141 and the median income for a family was $53,678. Males had a median income of $43,209 versus $30,811 for females. The per capita income for the county was $22,110. About 11.1% of families and 15.9% of the population were below the, including 24.5% of those under age 18 and 7.4% of those age 65 or over.

Metropolitan Statistical Area
The Springfield metropolitan area was first defined in 1950. Then known as the Springfield Standard Metropolitan Area (Springfield SMA), it consisted of a single county – Clark – and had a population of 111,661. Following a term change by the Bureau of the Budget (present-day ) in 1959, the Springfield SMA became the Springfield Standard Metropolitan Statistical Area (Springfield SMSA). By the of 1960, the population had grown to 131,440, an 18 percent increase over the previous census. Champaign County was added to the Springfield SMSA in 1973. The two-county area had a combined population of 187,606 in 1970.

In 1983, the official name was shortened to the Springfield Metropolitan Statistical Area (Springfield MSA). That same year, Dayton and Springfield were grouped together as the Dayton-Springfield Metropolitan Statistical Area. The new MSA consisted of four counties – Clark County, Greene, Miami, and Montgomery. This arrangement remained unchanged until 2003, when the MSA was split with Springfield's newly defined metropolitan area including only Clark County.

Cities

 * New Carlisle
 * Springfield (county seat)

Villages

 * Catawba
 * Clifton
 * Donnelsville
 * Enon
 * North Hampton
 * South Charleston
 * South Vienna
 * Tremont City

Townships

 * Bethel
 * German
 * Green
 * Harmony
 * Mad River
 * Madison
 * Moorefield
 * Pike
 * Pleasant
 * Springfield

Census-designated places

 * Crystal Lakes
 * Green Meadows
 * Holiday Valley
 * Northridge
 * Park Layne

Unincorporated communities

 * Beatty
 * Brighton
 * Cortsville
 * Dialton
 * Dodo
 * Dolly Varden
 * Durbin
 * Eagle City
 * Harmony
 * Hustead
 * Lawrenceville
 * Limestone City
 * Lisbon
 * Locustgrove
 * Medway
 * New Moorefield
 * Pitchin
 * Plattsburgh
 * Selma
 * Sugar Grove
 * Villa