In 2022, Dewey County, SD had a population of 5.28k people with a median age of 27.1 and a median household income of $55,077. Between 2021 and 2022 the population of Dewey County, SD declined from 5,343 to 5,275, a −1.27% decrease and its median household income grew from $46,087 to $55,077, a 19.5% increase.
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None of the households in Dewey 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.
99.6% of the residents in Dewey County, SD are U.S. citizens.
In 2022, the median property value in Dewey County, SD was $74,800, and the homeownership rate was 60.7%.
Most people in Dewey County, SD drove alone to work, and the average commute time was 16.8 minutes. The average car ownership in Dewey County, SD was 1 car per household.
Dewey County, SD borders Corson County, SD, Haakon County, SD, Potter County, SD, Stanley County, SD, Sully County, SD, Walworth County, SD, and Ziebach County, SD.