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.
| Name: | Lake County |
|---|---|
| FIPS code: | 46-079 |
| State: | South Dakota |
| Founded: | 1873 |
| Seat: | Madison |
| Largest city: | Madison |
| Total Area: | 575 sq mi (1,490 km²) |
| Land Area: | 563 sq mi (1,460 km²) |
| Total Population: | 11,059 |
| Population Density: | 19/sq mi (7.4/km²) |
| Time zone: | UTC−6 (Central) |
| Summer Time Zone (DST): | UTC−5 (CDT) |
| Website: | www.lake.sd.gov/default.aspx |
Lake County location map. Where is Lake County?
Lake County Road Map
Geography
The terrain of Lake County consists of rolling hills, with the area devoted to agriculture. A tributary of the East Fork Vermillion River flows south-southeastward through the lower western part of the county, and Buffalo Creek flows southeastward from the central part of the county, leaving the county near its southeast corner. The terrain generally slopes to the south, although high points (ca. 1,814′ ASL) are found on the north and south boundary lines and points between.
Lake County has a total area of 575 square miles (1,490 km), of which 563 square miles (1,460 km) is land and 12 square miles (31 km) (2.1%) is water.
Lakes
- Buffalo Slough
- Brant Lake
- Davis Slough
- Gilman Lake
- Green Lake
- Lake Badus
- Lake Herman
- Lake Madison
- Long Lake
- Mud Lake
- Pelican Lake
- Round Lake
- Spring Lake
Protected areas
- Lake Herman State Park
- Walker’s Point State Recreation Area
Major highways
- U.S. Highway 81
- South Dakota Highway 19
- South Dakota Highway 34
Adjacent counties
- Brookings County – northeast
- Moody County – east
- Minnehaha County – southeast
- McCook County – southwest
- Miner County – west
- Kingsbury County – northwest
Lake County Topographic Map
Lake County Satellite Map
Lake County Outline Map
