Clark County, South Dakota
Clark County is a county in the U.S. state of South Dakota. As of the 2020 census, the population was 3,837. Its county seat is Clark. The county was created in 1873 and organized in 1881. It was named for Newton Clark, a Dakota Territory legislator in 1873. Geography Clark County terrain consists of rolling hills, dotted with lakes and ponds especially in the east central portion. The area is mostly devoted to agriculture. The county has a total area of , of which is land and (1.0%) is water. Major highways U.S. Highway 212 South Dakota Highway 20 South Dakota Highway 25 South Dakota Highway 28 Adjacent counties Day County - north Codington County - east Hamlin County - southeast Kingsbury County - south Beadle County - southwest Spink County - west Protected areas Christopherson State Public Shooting Area Dry Lake Number Two State Public Shooting Area Fordham State Public Shooting Area McPeek State Public Shooting Area Stairs Slough State Public Shooting Area Willow Lake State Public Shooting Area Lakes and reservoirs Baileys Lake Dry Lake Number One Dry Lake Number Two Mud Lake Reid Lake Swan Lake Willow Lake Demographics 2020 census As of the census of 2020,