THE LAKE COUNTY LAND BRIEF
Land in the
Prairie Coteau setting.
Lake County has 562.9 square miles of land in South Dakota. 2 mapped landscape regions meet across Lake County: Prairie Coteau, James River Lowland.
Flat to gently rolling glacial terrain supports a prairie transition between taller and shorter grasses. Many temporary and seasonal wetlands occupy depressions left in the glacial landscape.
Regional context: Northern Glaciated Plains ↗ · Regional mapping across the county footprint
Where the landscape changes
Lake County intersects 2 mapped regional units. The largest mapped shares are:
- Prairie Coteau88.1%
- James River Lowland11.9%
Finding your parcel within Lake County
The atlas lists 27 cities, towns, townships, and Census communities associated with Lake County, including Winfred, Concord, Clarno. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Lake County by land and water
The Census records 12.3 square miles of water within Lake County, or 2.1% of its total area. That share is close to Lake County’s 2.1%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Lake County has 121.9 times the land area of nearby Madison city (4.62 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Brookings County, Kingsbury County, McCook County, Miner County, Minnehaha County, Moody County within South Dakota. A tract near one of these lines should be matched to the county identifier on its own records.

