In 2019, Dewey County, SD had a population of 5.83k people with a median age of 26.9 and a median household income of $47,475. Between 2018 and 2019 the population of Dewey County, SD grew from 5,779 to 5,833, a 0.934% increase and its median household income grew from $43,954 to $47,475, a 8.01% increase.
The 5 largest ethnic groups in Dewey County, SD are American Indian & Alaska Native (Non-Hispanic) (78.3%), White (Non-Hispanic) (19.8%), American Indian & Alaska Native (Hispanic) (0.6%), Two+ (Non-Hispanic) (0.446%), and Two+ (Hispanic) (0.257%). 0% of the households in Dewey County, SD speak a non-English language at home as their primary language, and 99.8% of the residents in Dewey County, SD are U.S. citizens.
In 2019, the median property value in Dewey County, SD was $64,400, and the homeownership rate was 61.1%. Most people in Dewey County, SD drove alone to work, and the average commute time was 15.2 minutes. The average car ownership in Dewey County, SD was 2 cars per household.