Lake County | |
|---|---|
.jpg) Lake County Court House | |
 Location within the U.S. state of South Dakota | |
 South Dakota's location within the U.S. | |
| Coordinates: 44°01′N 97°07′W / 44.02°N 97.12°W | |
| 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 (2023) | 11,031  |
| • Density | 19/sq mi (7.4/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional district | At-large |
| Website | www |
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]
- ^ "State & County QuickFacts". United States Census Bureau. Retrieved March 21, 2024.
- ^ "Find a County". National Association of Counties. Retrieved June 7, 2011.
- ^ "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.