In 2018, Sully County, SD had a population of 1.33k people with a median age of 45.5 and a median household income of $64,028. Between 2017 and 2018 the population of Sully County, SD declined from 1,390 to 1,331, a -4.24% decrease and its median household income grew from $60,694 to $64,028, a 5.49% increase.
The 5 largest ethnic groups in Sully County, SD are White (Non-Hispanic) (95.4%), Two+ (Non-Hispanic) (2.25%), Two+ (Hispanic) (1.05%), American Indian & Alaska Native (Non-Hispanic) (0.977%), and American Indian & Alaska Native (Hispanic) (0.301%). NaNk% of the people in Sully County, SD speak a non-English language, and 100% are U.S. citizens.
The median property value in Sully County, SD is $150,400, and the homeownership rate is 82.4%. Most people in Sully County, SD commute by Drove Alone, and the average commute time is 11.8 minutes. The average car ownership in Sully County, SD is 3 cars per household.