In 2023, Day County, SD had a population of 5.46k people with a median age of 47.1 and a median household income of $62,270. Between 2022 and 2023 the population of Day County, SD declined from 5,485 to 5,460, a −0.456% decrease and its median household income grew from $57,558 to $62,270, a 8.19% increase.
The 5 largest ethnic groups in Day County, SD are White (Non-Hispanic) (83.9%), American Indian & Alaska Native (Non-Hispanic) (9.52%), Two+ (Non-Hispanic) (3.68%), White (Hispanic) (1.5%), and Two+ (Hispanic) (0.751%).
None of the households in Day 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.
99.7% of the residents in Day County, SD are U.S. citizens.
In 2023, the median property value in Day County, SD was $155,100, and the homeownership rate was 75.8%.
Most people in Day County, SD drove alone to work, and the average commute time was 22.1 minutes. The average car ownership in Day County, SD was 2 cars per household.
Day County, SD borders Brown County, SD, Clark County, SD, Codington County, SD, Grant County, SD, Marshall County, SD, Roberts County, SD, and Spink County, SD.