In 2019, Stanley County, SD had a population of 3.02k people with a median age of 44.5 and a median household income of $71,382. Between 2018 and 2019 the population of Stanley County, SD grew from 2,997 to 3,017, a 0.667% increase and its median household income declined from $71,763 to $71,382, a −0.531% decrease.
The 5 largest ethnic groups in Stanley County, SD are White (Non-Hispanic) (88.1%), American Indian & Alaska Native (Non-Hispanic) (5.44%), White (Hispanic) (2.92%), Two+ (Non-Hispanic) (2.39%), and Native Hawaiian & Other Pacific Islander (Non-Hispanic) (1.19%). 0% of the households in Stanley County, SD speak a non-English language at home as their primary language, and 100% of the residents in Stanley County, SD are U.S. citizens.
In 2019, the median property value in Stanley County, SD was $163,300, and the homeownership rate was 78.9%. Most people in Stanley County, SD drove alone to work, and the average commute time was 14.7 minutes. The average car ownership in Stanley County, SD was 2 cars per household.