In 2019, Gregory County, SD had a population of 4.19k people with a median age of 45.4 and a median household income of $43,438. Between 2018 and 2019 the population of Gregory County, SD declined from 4,201 to 4,186, a −0.357% decrease and its median household income declined from $44,479 to $43,438, a −2.34% decrease.
The 5 largest ethnic groups in Gregory County, SD are White (Non-Hispanic) (87.7%), American Indian & Alaska Native (Non-Hispanic) (6.69%), Two+ (Non-Hispanic) (2.94%), Asian (Non-Hispanic) (1.77%), and Other (Hispanic) (0.478%). 0% of the households in Gregory County, SD speak a non-English language at home as their primary language, and 99.9% of the residents in Gregory County, SD are U.S. citizens.
In 2019, the median property value in Gregory County, SD was $83,400, and the homeownership rate was 71.6%. Most people in Gregory County, SD drove alone to work, and the average commute time was 14.8 minutes. The average car ownership in Gregory County, SD was 2 cars per household.