Lake County, South Dakota

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.
Coordinates: 44°01′N 97°07′W / 44.02°N 97.12°W / 44.02; -97.12
Country United States
State South Dakota
Founded1873
SeatMadison
Largest cityMadison
Area
 • Total575 sq mi (1,490 km2)
 • Land563 sq mi (1,460 km2)
 • Water12 sq mi (30 km2)  2.1%
Population
 (2020)
 • Total11,059
 • Estimate 
(2023)
11,031 Decrease
 • Density19/sq mi (7.4/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional districtAt-large
Websitewww.lake.sd.gov

Lake County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 11,059.[1] Its county seat is Madison.[2] The county was formed in 1873.[3]

  1. ^ "State & County QuickFacts". United States Census Bureau. Retrieved March 21, 2024.
  2. ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.
  3. ^ "Dakota Territory, South Dakota, and North Dakota: Individual County Chronologies". Dakota Territory Atlas of Historical County Boundaries. The Newberry Library. 2006. Archived from the original on April 2, 2018. Retrieved March 30, 2015.

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