Largest foreign-born population, South Dakota counties

South Dakota counties with the most residents born outside the United States, as of the 2024 American Community Survey. Ranked by number of people, not share. This list covers the 66 counties in South Dakota that qualify, ranked against each other statewide. The median across all 66 is 86. Biggest climber in the top 100 since 2020: Sully County, SD, up 30 places to #36.