Place:Lake, South Dakota, United States

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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.

Timeline

Date Event Source
1873 County formed Source:Red Book: American State, County, and Town Sources
1880 First census Source:Population of States and Counties of the United States: 1790-1990
1880 No significant boundary changes after this year Source:Population of States and Counties of the United States: 1790-1990

Population History

source: Source:Population of States and Counties of the United States: 1790-1990
Census Year Population
1880 2,657
1890 7,508
1900 9,137
1910 10,711
1920 12,257
1930 12,379
1940 12,412
1950 11,792
1960 11,764
1970 11,456
1980 10,724
1990 10,550

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