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McCook County
McCook County
County
	McCook County Courthouse
	Location within the U.S. state of South Dakota
	South Dakota's location within the U.S.
	Coordinates: 43°40′N 97°22′W / 43.67°N 97.36°W
Country	United States
State	South Dakota
Founded	January 8, 1873 (created); June 15, 1878 (organized)
Named for	Edwin Stanton McCook
Seat	Salem
Largest city	Salem
Area
• Total	577 sq mi (1,490 km2)
• Land	574 sq mi (1,490 km2)
• Water	2.7 sq mi (7 km2) 0.5%
Population (2020)
• Total	5,682
• Estimate (2023)	5,809
• Density	9.8/sq mi (3.8/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	At-large
Website	www.mccookcountysd.com

McCook County is a county in the U.S. state of South Dakota. At the 2020 census, the population was 5,682.^[1] Its county seat is Salem.^[2] The county was established in 1873, and was organized in 1878.^[3] It was named for the former governor of the Dakota Territory and Civil War general Edwin Stanton McCook.^[4]^[5]

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.^[6] The terrain slopes to the south and southwest; its highest point is near its northeast corner, at 1,798 ft (548 m) ASL.^[7] The county has a total area of 577 square miles (1,490 km²), of which 574 square miles (1,490 km²) is land and 2.7 square miles (7.0 km²) (0.5%) is water.^[8]

Major highways

Adjacent counties

Lake County - northeast
Minnehaha County - east
Turner County - southeast
Hutchinson County - southwest
Hanson County - west
Miner County - northwest

Protected areas^[6]

Ediger State Game Production Area
Forsch Lake State State Game Production Area
Lake Vermillion State Recreation Area
Lehrman Slough State Game production Area
Tschetter Slough State Game Production Area

Lakes^[6]

East Vermillion Lake AKA Lake Vermillion
Island Lake
Lake Ell

Demographics

Historical population
Census	Pop.	Note	%±
1880	1,283		—
1890	6,448		402.6%
1900	8,689		34.8%
1910	9,589		10.4%
1920	9,990		4.2%
1930	10,316		3.3%
1940	9,793		−5.1%
1950	8,828		−9.9%
1960	8,268		−6.3%
1970	7,246		−12.4%
1980	6,444		−11.1%
1990	5,688		−11.7%
2000	5,832		2.5%
2010	5,618		−3.7%
2020	5,682		1.1%
2023 (est.)	5,809	^[9]	2.2%
U.S. Decennial Census^[10] 1790-1960^[11] 1900-1990^[12] 1990-2000^[13] 2010-2020^[1]

2020 census

As of the 2020 census, there were 5,682 people, 2,159 households, and 1,505 families residing in the county.^[14] The population density was 9.9 inhabitants per square mile (3.8/km²). 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 inhabitants per square mile (3.8/km²). There were 2,491 housing units at an average density of 4.3 units per square mile (1.7 units/km²). 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.

United States presidential election results for McCook County, South Dakota^[15]
Year	Republican		Democratic		Third party(ies)
Year	No.	%	No.	%	No.	%
2024	2,227	73.47%	733	24.18%	71	2.34%
2020	2,068	71.31%	769	26.52%	63	2.17%
2016	1,794	69.35%	623	24.08%	170	6.57%
2012	1,655	63.34%	905	34.63%	53	2.03%
2008	1,646	55.89%	1,219	41.39%	80	2.72%
2004	2,017	61.66%	1,201	36.72%	53	1.62%
2000	1,610	61.19%	965	36.68%	56	2.13%
1996	1,292	47.45%	1,166	42.82%	265	9.73%
1992	1,177	39.44%	1,167	39.11%	640	21.45%
1988	1,501	50.00%	1,492	49.70%	9	0.30%
1984	1,902	56.57%	1,448	43.07%	12	0.36%
1980	2,014	56.83%	1,223	34.51%	307	8.66%
1976	1,744	48.74%	1,822	50.92%	12	0.34%
1972	1,963	49.53%	1,993	50.29%	7	0.18%
1968	1,959	51.55%	1,653	43.50%	188	4.95%
1964	1,756	44.60%	2,181	55.40%	0	0.00%
1960	2,375	56.93%	1,797	43.07%	0	0.00%
1956	2,382	57.54%	1,758	42.46%	0	0.00%
1952	2,991	72.63%	1,127	27.37%	0	0.00%
1948	2,064	59.46%	1,387	39.96%	20	0.58%
1944	2,516	68.39%	1,163	31.61%	0	0.00%
1940	3,310	66.12%	1,696	33.88%	0	0.00%
1936	2,117	43.64%	2,536	52.28%	198	4.08%
1932	1,436	32.47%	2,884	65.22%	102	2.31%
1928	2,234	55.78%	1,758	43.90%	13	0.32%
1924	1,368	44.27%	457	14.79%	1,265	40.94%
1920	1,864	60.52%	565	18.34%	651	21.14%
1916	1,194	52.19%	1,021	44.62%	73	3.19%
1912	0	0.00%	962	44.64%	1,193	55.36%
1908	1,209	57.00%	826	38.94%	86	4.05%
1904	1,284	63.00%	693	34.00%	61	2.99%
1900	978	49.07%	989	49.62%	26	1.30%
1896	678	39.03%	1,047	60.28%	12	0.69%
1892	573	37.35%	262	17.08%	699	45.57%