None of the households in Douglas County, SD reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
97.4% of the residents in Douglas County, SD are U.S. citizens.
Douglas County, SD borders Aurora County, SD, Charles Mix County, SD, Davison County, SD, and Hutchinson County, SD.