In 2021, Marshall County, SD had a population of 4.37k people with a median age of 42.4 and a median household income of $69,236. Between 2020 and 2021 the population of Marshall County, SD declined from 4,881 to 4,373, a −10.4% decrease and its median household income grew from $68,056 to $69,236, a 1.73% increase.
The 5 largest ethnic groups in Marshall County, SD are White (Non-Hispanic) (81.9%), American Indian & Alaska Native (Non-Hispanic) (7.07%), Other (Hispanic) (4.25%), Two+ (Non-Hispanic) (2.4%), and White (Hispanic) (2.06%).
None of the households in Marshall 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.
96.9% of the residents in Marshall County, SD are U.S. citizens.
In 2021, the median property value in Marshall County, SD was $132,500, and the homeownership rate was 79.6%.
Most people in Marshall County, SD drove alone to work, and the average commute time was 18.4 minutes. The average car ownership in Marshall County, SD was 2 cars per household.
Marshall County, SD borders Richland County, ND, Sargent County, ND, Brown County, SD, Day County, SD, and Roberts County, SD.