Ranking of South Dakota Counties By Percentage of Population with Finnish Ancestry in 2021

Based on the US Census ACS-5Yrs estimates, in 2021, there were 4.35K people in South Dakota with Finnish ancestry (0.49% of South Dakota population). Among all South Dakota counties, Hamlin County had the highest percentage of its population with Finnish ancestry (13.65%), followed by Clark County (6.70%), and Custer County (1.41%).

The chart and table below shows the top 10 counties with high percentage of its population having Finnish ancestry.

You can see similar information for other states and for other ancestry groups in South Dakota.