Largest French Canadian population, South Dakota counties

South Dakota counties ranked by the number of residents who are French Canadian ancestry, from the 2024 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 51 counties in South Dakota that qualify, ranked against each other statewide. The median across all 51 is 19. Biggest climber in the top 100 since 2020: Brule County, SD, up 33 places to #18.