In 2017, Dewey County, SD had a population of 5.71k people with a median age of 28 and a median household income of $41,190. Between 2016 and 2017 the population of Dewey County, SD grew from 5,652 to 5,709, a 1.01% increase and its median household income grew from $40,585 to $41,190, a 1.49% increase.
The 5 largest ethnic groups in Dewey County, SD are American Indian & Alaska Native (Non-Hispanic) (77.1%), White (Non-Hispanic) (20.4%), Two or More Races (Non-Hispanic) (1.03%), American Indian & Alaska Native (Hispanic) (0.613%), and Two or More Races (Hispanic) (0.596%). N/A% of the people in Dewey County, SD speak a non-English language, and 99.9% are U.S. citizens.
The median property value in Dewey County, SD is $65,700, and the homeownership rate is 58.4%. Most people in Dewey County, SD commute by Drove Alone, and the average commute time is 14.6 minutes. The average car ownership in Dewey County, SD is 2 cars per household.