McCook County is a county in the U.S. state of South Dakota. At the 2020 census, the population was 5,682. Its county seat is Salem. The county was established in 1873, and was organized in 1878. It was named for the former governor of the Dakota Territory and Civil War general Edwin Stanton McCook. McCook County is part of the Sioux Falls, SD Metropolitan Statistical Area.

Geography

The terrain of McCook County consists of rolling hills, mostly devoted to agriculture. The terrain slopes to the south and southwest; its highest point is near its northeast corner, at 1,798 ft ASL. The county has a total area of 577 sqmi, of which 574 sqmi is land and 2.7 sqmi (0.5%) is water.

Major highways

Adjacent counties

Protected areas

Lakes

Demographics

2020 census

As of the 2020 census, there were 5,682 people, 2,159 households, and 1,505 families residing in the county. The population density was 9.9 PD/sqmi. There were 2,448 housing units.

2010 census

As of the 2010 census, there were 5,618 people, 2,168 households, and 1,535 families in the county. The population density was 9.8 PD/sqmi. There were 2,491 housing units at an average density of 4.3 /mi2. The racial makeup of the county was 98.0% white, 0.4% American Indian, 0.1% Pacific islander, 0.1% Asian, 0.1% black or African American, 0.6% from other races, and 0.7% from two or more races. Those of Hispanic or Latino origin made up 1.8% of the population. In terms of ancestry, 61.5% were German, 12.8% were Irish, 11.1% were Norwegian, 7.4% were Swedish, 6.2% were Dutch, 5.2% were English, and 3.5% were American. Of the 2,168 households, 30.4% had children under the age of 18 living with them, 61.0% were married couples living together, 6.0% had a female householder with no husband present, 29.2% were non-families, and 26.2% of all households were made up of individuals. The average household size was 2.45 and the average family size was 2.94. The median age was 42.7 years. The median income for a household in the county was $42,022 and the median income for a family was $57,287. Males had a median income of $35,951 versus $29,750 for females. The per capita income for the county was $25,502. About 5.2% of families and 7.9% of the population were below the poverty line, including 6.7% of those under age 18 and 14.4% of those age 65 or over.

Politics

McCook County voters usually vote Republican. Although the county was one only 130 nationwide to support favorite son George McGovern in 1972, it has selected the Democratic nominee in only six other elections since South Dakota's statehood, and none since 1980.

Communities

Cities

Census-designated places

Unincorporated communities

Townships

The county is divided into sixteen townships:

Other places