In 2021, Sully County, SD had a population of 1.28k people with a median age of 51.6 and a median household income of $59,688. Between 2020 and 2021 the population of Sully County, SD grew from 1,278 to 1,279, a 0.0782% increase and its median household income declined from $60,508 to $59,688, a −1.36% decrease.
The 5 largest ethnic groups in Sully County, SD are White (Non-Hispanic) (94.1%), Two+ (Non-Hispanic) (2.42%), Two+ (Hispanic) (1.56%), American Indian & Alaska Native (Non-Hispanic) (1.17%), and Black or African American (Non-Hispanic) (0.704%).
None of the households in Sully County, SD reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
99.1% of the residents in Sully County, SD are U.S. citizens.
In 2021, the median property value in Sully County, SD was $135,800, and the homeownership rate was 82.9%.
Most people in Sully County, SD drove alone to work, and the average commute time was 16.1 minutes. The average car ownership in Sully County, SD was 3 cars per household.
Sully County, SD borders Dewey County, SD, Hughes County, SD, Hyde County, SD, Potter County, SD, and Stanley County, SD.