In 2018, Union County, SD had a population of 15.2k people with a median age of 40.6 and a median household income of $69,563. Between 2017 and 2018 the population of Union County, SD grew from 14,929 to 15,177, a 1.66% increase and its median household income grew from $65,434 to $69,563, a 6.31% increase.
The 5 largest ethnic groups in Union County, SD are White (Non-Hispanic) (92.5%), Two+ (Non-Hispanic) (1.76%), White (Hispanic) (1.57%), Asian (Non-Hispanic) (1.16%), and Other (Hispanic) (0.857%). 0% of the households in Union County, SD speak a non-English language at home as their primary language, and 98.3% of the residents in Union County, SD are U.S. citizens.
In 2018, the median property value in Union County, SD was $172,400, and the homeownership rate was 70.7%. Most people in Union County, SD drove alone to work, and the average commute time was 18.8 minutes. The average car ownership in Union County, SD was 2 cars per household.