Clear Lake is an unincorporated community and census-designated place (CDP) in Marshall County, South Dakota, United States, surrounding a natural lake of the same name.

Within the Lake Traverse Indian Reservation, it was first listed as a CDP prior to the 2020 census.

[2] The population was 170 at the 2020 census.

[4] It is in the southeast part of the county, bordered to the northeast by South Dakota Highway 10, which leads northwest 4 miles (6 km) to Lake City and southeast 16 miles (26 km) to Sisseton.

This South Dakota state location article is a stub.