In 2022, Jefferson, SD had a population of 631 people with a median age of 37.1 and a median household income of $77,601. Between 2021 and 2022 the population of Jefferson, SD declined from 667 to 631, a −5.4% decrease and its median household income grew from $69,000 to $77,601, a 12.5% increase.
The 5 largest ethnic groups in Jefferson, SD are White (Non-Hispanic) (91.9%), American Indian & Alaska Native (Hispanic) (3.65%), Two+ (Non-Hispanic) (3.17%), Other (Non-Hispanic) (0.792%), and Other (Hispanic) (0.475%).
None of the households in Jefferson, 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.
97.5% of the residents in Jefferson, SD are U.S. citizens.
In 2022, the median property value in Jefferson, SD was $167,500, and the homeownership rate was 87.2%.
Most people in Jefferson, SD drove alone to work, and the average commute time was 25.9 minutes. The average car ownership in Jefferson, SD was 2 cars per household.