South Dakota Citizen Population By County in 2021 (ACS-5Yrs)
Updated on March 28, 2026.
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2021, the citizen population for South Dakota was 861,895 and represented 97.74% of the total South Dakota population.
Among all South Dakota counties, Minnehaha had the highest citizen population (186.98K), followed by Pennington (107.32K), and Lincoln (61.65K).
In terms of percentages, Buffalo had the highest percentage of its population being citizens (100.00%), followed by Faulk (100.00%), and Gregory (100.00%).
The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.
You can see similar information for other states and by state for the United States.
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Data Source: US Census - ACS 5-Year (CVAP).
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South Dakota Citizen Population By County in 2021
South Dakota Citizen Population By County in 2021
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| County | Citizen Population | % of County Population |
|---|---|---|
| Minnehaha | 186975 | 95.94 |
| Pennington | 107315 | 98.72 |
| Lincoln | 61645 | 97.49 |
| Brown | 37045 | 96.30 |
| Brookings | 32990 | 96.14 |
| Meade | 29190 | 98.75 |
| Codington | 27825 | 98.36 |
| Lawrence | 25285 | 98.44 |
| Yankton | 22810 | 98.26 |
| Davison | 19685 | 98.70 |
| Hughes | 17770 | 99.66 |
| Beadle | 17435 | 91.96 |
| Union | 16225 | 98.78 |
| Clay | 14405 | 97.23 |
| Oglala Lakota | 13835 | 100.00 |
| Lake | 11240 | 98.94 |
| Roberts | 10210 | 99.56 |
| Butte | 10155 | 99.90 |
| Charles Mix | 9305 | 99.57 |
| Todd | 9185 | 97.35 |
| Turner | 8540 | 99.07 |
| Custer | 8295 | 99.22 |
| Hutchinson | 7400 | 99.87 |
| Grant | 7310 | 96.82 |
| Bon Homme | 6980 | 99.43 |
| Fall River | 6890 | 98.71 |
| Spink | 6380 | 99.53 |
| Moody | 6275 | 99.05 |
| Hamlin | 5960 | 97.31 |
| McCook | 5620 | 99.03 |
| Tripp | 5560 | 99.02 |
| Day | 5470 | 99.73 |
| Walworth | 5325 | 99.44 |
| Dewey | 5290 | 98.97 |
| Brule | 5215 | 99.43 |
| Kingsbury | 5120 | 99.81 |
| Deuel | 4235 | 98.83 |
| Marshall | 4235 | 96.80 |
| Gregory | 4005 | 100.00 |
| Corson | 3960 | 99.87 |
| Edmunds | 3955 | 98.75 |
| Clark | 3745 | 98.81 |
| Lyman | 3730 | 99.60 |
| Hanson | 3425 | 99.85 |
| Bennett | 3385 | 99.27 |
| Hand | 3005 | 98.20 |
| Stanley | 2965 | 100.00 |
| Perkins | 2960 | 99.50 |
| Jackson | 2855 | 99.48 |
| Douglas | 2825 | 99.47 |
| Potter | 2595 | 99.24 |
| Aurora | 2560 | 96.60 |
| Ziebach | 2460 | 99.19 |
| Sanborn | 2355 | 99.37 |
| Miner | 2295 | 100.00 |
| McPherson | 2230 | 99.33 |
| Faulk | 2155 | 100.00 |
| Buffalo | 1975 | 100.00 |
| Mellette | 1915 | 100.00 |
| Haakon | 1870 | 100.00 |
| Jerauld | 1770 | 97.79 |
| Campbell | 1540 | 99.36 |
| Hyde | 1380 | 100.00 |
| Sully | 1270 | 99.22 |
| Harding | 1165 | 98.73 |
| Jones | 910 | 99.45 |
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