South Dakota Counties by Population (2025)

The most populous counties in South Dakota are Minnehaha County with 206,930, Pennington County at 115,903, Lincoln County with 73,238, Brown County at 37,733, and Brookings County with 35,980. You can get the most current Census population data for all 66 South Dakota counties, sorted from the most populous counties in South Dakota to the least, according to the 2023 Population Estimates Program.

Sure, you can copy this list right into your favorite spreadsheet tool. Or save yourself formatting headaches and grab the latest South Dakota counties population data as a ready-to-use Excel™ file below. It's time to stop searching and start digging into data!