Crocker is an unincorporated community and census-designated place (CDP) in Clark County, South Dakota, United States. The population was 19 at the 2020 census.
Crocker was laid out in 1906.
Crocker is located in northern Clark County along South Dakota Highway 20, which leads east and southeast to Watertown and west to Conde.
According to the United States Census Bureau, the Crocker CDP has a total area of , of which is land and , or 7.83%, is water.