Clark is a city in Clark County, South Dakota, United States. The population was 1,139 at the 2010 census. It is the county seat of Clark County.
Clark is located at 44°52′46″N 97°44′3″W / 44.87944°N 97.73417°W / 44.87944; -97.73417 (44.879459, -97.734181960s2). The town of Clark is located almost exactly in the geographical center of Clark County. The highest point in Clark County is located near the Township of Maydell, and the unnamed peak rises to 1,930 ft.
According to the United States Census Bureau, the city has a total area of 1.28 square miles (3.32 km), all of it land.
Clark has been assigned the ZIP code 57225 and the FIPS place code 12180.
As of the census of 2010, there were 1,139 people, 552 households, and 306 families residing in the city. The population density was 889.8 inhabitants per square mile (343.6/km). There were 627 housing units at an average density of 489.8 per square mile (189.1/km). The racial makeup of the city was 98.5% White, 0.1% African American, 0.2% Asian, 0.3% from other races, and 1.0% from two or more races. Hispanic or Latino of any race were 1.4% of the population.
There were 552 households of which 19.2% had children under the age of 18 living with them, 46.4% were married couples living together, 6.0% had a female householder with no husband present, 3.1% had a male householder with no wife present, and 44.6% were non-families. 40.6% of all households were made up of individuals and 24.1% had someone living alone who was 65 years of age or older. The average household size was 1.99 and the average family size was 2.68.
The median age in the city was 51.5 years. 18.8% of residents were under the age of 18; 3.7% were between the ages of 18 and 24; 20.1% were from 25 to 44; 24.8% were from 45 to 64; and 32.7% were 65 years of age or older. The gender makeup of the city was 47.1% male and 52.9% female.
As of the census of 2000, there were 1,285 people, 558 households, and 334 families residing in the city. The population density was 979.3 people per square mile (378.7/km²). There were 632 housing units at an average density of 481.6 per square mile (186.3/km²). The racial makeup of the city was 98.68% White, 0.23% African American, 0.39% Native American, 0.31% Asian, 0.08% from other races, and 0.31% from two or more races. Hispanic or Latino of any race were 0.31% of the population.
There were 558 households out of which 24.0% had children under the age of 18 living with them, 50.7% were married couples living together, 6.6% had a female householder with no husband present, and 40.1% were non-families. 37.5% of all households were made up of individuals and 24.2% had someone living alone who was 65 years of age or older. The average household size was 2.19 and the average family size was 2.90.
In the city, the population was spread out with 22.8% under the age of 18, 4.4% from 18 to 24, 19.9% from 25 to 44, 23.1% from 45 to 64, and 29.7% who were 65 years of age or older. The median age was 47 years. For every 100 females, there were 84.1 males. For every 100 females age 18 and over, there were 80.4 males.
As of 2000 the median income for a household in the city was $29,432, and the median income for a family was $39,167. Males had a median income of $26,771 versus $17,868 for females. The per capita income for the city was $14,758. About 6.3% of families and 9.1% of the population were below the poverty line, including 7.0% of those under age 18 and 18.8% of those age 65 or over.
Clark South Dakota neighborhoods include: Alcester, Baltic, Black Hawk, Box Elder, Brandon, Buffalo Ridge, Camp Crook, Canton, Caputa, Central City, Chancellor, Colton, Creighton, Crooks, Custer, Deadwood, Dell Rapids, Elkton, Ellsworth Afb, Garretson, Hartford, Hermosa, Hill City, Howes, Humboldt, Keystone, Lead, Ludlow, Montrose, Nemo, New Underwood, North Sioux City, Owanka, Parker, Quinn, Rapid City, Renner, Rowena, Saint Onge, Scenic, Sherman, Silver City, Sioux Falls, Spearfish, Sturgis, Valley Springs, Wall, Wanblee, Wasta, Whitewood