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Lake County, South Dakota facts for kids

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Lake County
Lake County Court House
Lake County Court House
Map of South Dakota highlighting Lake County
Location within the U.S. state of South Dakota
Map of the United States highlighting South Dakota
South Dakota's location within the U.S.
Country  United States
State  South Dakota
Founded 1873
Seat Madison
Largest city Madison
Area
 • Total 575 sq mi (1,490 km2)
 • Land 563 sq mi (1,460 km2)
 • Water 12 sq mi (30 km2)  2.1%
Population
 (2020)
 • Total 11,059
 • Estimate 
(2021)
10,851 Decrease
 • Density 19.233/sq mi (7.426/km2)
Time zone UTC−6 (Central)
 • Summer (DST) UTC−5 (CDT)
Congressional district At-large

Lake County is a county in the U.S. state of South Dakota. As of the 2020 United States Census, the population was 11,059. Its county seat is Madison. The county was formed in 1873.

Geography

According to the U.S. Census Bureau, the county has a total area of 575 square miles (1,490 km2), of which 563 square miles (1,460 km2) is land and 12 square miles (31 km2) (2.1%) is water.

Lakes

Major highways

Adjacent counties

Demographics

Historical population
Census Pop.
1880 2,657
1890 7,508 182.6%
1900 9,137 21.7%
1910 10,711 17.2%
1920 12,257 14.4%
1930 12,379 1.0%
1940 12,412 0.3%
1950 11,792 −5.0%
1960 11,764 −0.2%
1970 11,456 −2.6%
1980 10,724 −6.4%
1990 10,550 −1.6%
2000 11,276 6.9%
2010 11,200 −0.7%
2020 11,059 −1.3%
2021 (est.) 10,851 −3.1%
US Decennial Census
1790-1960 1900-1990
1990-2000 2010-2020

2010 census

As of the 2010 United States Census, there were 11,200 people, 4,483 households, and 2,814 families in the county. The population density was 19.9 inhabitants per square mile (7.7/km2). There were 5,559 housing units at an average density of 9.9 per square mile (3.8/km2). The racial makeup of the county was 96.2% white, 0.7% Asian, 0.7% American Indian, 0.5% black or African American, 0.8% from other races, and 1.1% from two or more races. Those of Hispanic or Latino origin made up 1.6% of the population. In terms of ancestry, 50.7% were German, 20.6% were Norwegian, 12.4% were Irish, 6.6% were English, 6.2% were Dutch, 5.0% were Danish, and 5.0% were American.

Of the 4,483 households, 26.7% had children under the age of 18 living with them, 53.0% were married couples living together, 6.8% had a female householder with no husband present, 37.2% were non-families, and 30.9% of all households were made up of individuals. The average household size was 2.30 and the average family size was 2.88. The median age was 39.9 years.

The median income for a household in the county was $45,606 and the median income for a family was $57,753. Males had a median income of $36,370 versus $25,898 for females. The per capita income for the county was $22,447. About 6.5% of families and 12.1% of the population were below the poverty line, including 12.8% of those under age 18 and 8.8% of those age 65 or over.

Communities

City

Towns

Village

Census-designated places

Other unincorporated communities

Townships

The county is divided into sixteen townships:

  • Badus
  • Chester
  • Clarno
  • Concord
  • Farmington
  • Franklin
  • Herman
  • Lake View
  • Le Roy
  • Nunda
  • Orland
  • Rutland
  • Summit
  • Wayne
  • Wentworth
  • Winfred

Historical townsite

  • Saranac
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