Willow Lake, SD
Willow Lake is a city in Clark County, South Dakota, United States. The population was 263 at the 2010 census.
Willow Lake is located at 44°37′40″N 97°38′17″W / 44.627892°N 97.637982°W / 44.627892; -97.637982.
According to the United States Census Bureau, the city has a total area of 0.4 square miles (1.0 km2), all of it land.