South Dakota Voting-age Population By County in 2021 (ACS-5Yrs)

Based on the US Census ACS-5Yrs estimates, in 2021, the voting-age population of South Dakota was 663.09K which was 75.20% of the total South Dakota population. Among all South Dakota counties, Minnehaha had the highest voting-age population (145.26K), followed by Pennington (83.49K), and Lincoln (45.66K).

On the other hand, the counties with the least voting-age population were: Jones (688), Harding (941), and Sully (1.04K).

The chart and table below shows the voting-age population of each county and the percentage of each county's population that are of voting-age.

You can see similar information for other states and by state for the United States.