In 2019, Ziebach County, SD had a population of 2.79k people with a median age of 33.1 and a median household income of $37,400. Between 2018 and 2019 the population of Ziebach County, SD declined from 2,814 to 2,791, a −0.817% decrease and its median household income grew from $37,143 to $37,400, a 0.692% increase.
The 5 largest ethnic groups in Ziebach County, SD are American Indian & Alaska Native (Non-Hispanic) (74.9%), White (Non-Hispanic) (23.5%), Asian (Non-Hispanic) (0.609%), Two+ (Non-Hispanic) (0.573%), and American Indian & Alaska Native (Hispanic) (0.179%). 0% of the households in Ziebach County, SD speak a non-English language at home as their primary language.
99.4% of the residents in Ziebach County, SD are U.S. citizens.
In 2019, the median property value in Ziebach County, SD was $57,700, and the homeownership rate was 57.2%. Most people in Ziebach County, SD drove alone to work, and the average commute time was 16.3 minutes. The average car ownership in Ziebach County, SD was 2 cars per household.