South Dakota Citizen Population By County in 2020 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2020, the citizen population for South Dakota was 857,610 and represented 97.53% of the total South Dakota population.

Among all South Dakota counties, Minnehaha had the highest citizen population (182.73K), followed by Pennington (111.11K), and Lincoln (57.34K).

In terms of percentages, Buffalo had the highest percentage of its population being citizens (100.00%), followed by Corson (100.00%), and Faulk (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.

You may also be interested in:
South Dakota Citizen Voting-age Population By County in 2020

Data Source: US Census - ACS 5-Year (CVAP).

See this for other years:

South Dakota Citizen Population By County in 2020

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County	Citizen Population	% of County Population
Minnehaha	182730	95.33
Pennington	111105	98.76
Lincoln	57335	97.37
Brown	37935	97.29
Brookings	33450	95.26
Meade	27930	99.22
Codington	27660	98.31
Lawrence	25310	98.08
Yankton	22375	98.37
Davison	19635	98.72
Hughes	17475	99.52
Beadle	16370	89.26
Union	15345	97.99
Oglala Lakota	14255	99.86
Clay	13590	96.55
Lake	12555	98.51
Butte	10280	99.85
Roberts	10240	99.32
Todd	10040	97.38
Charles Mix	9285	99.57
Custer	8770	99.38
Turner	8250	99.10
Hutchinson	7235	98.97
Bon Homme	6880	99.49
Grant	6845	96.07
Fall River	6670	99.26
Moody	6455	99.16
Spink	6375	98.99
Hamlin	5945	97.38
Dewey	5790	99.14
McCook	5490	99.01
Day	5440	99.82
Walworth	5405	99.54
Tripp	5335	97.89
Brule	5195	99.24
Kingsbury	4925	99.80
Marshall	4715	96.62
Deuel	4255	98.72
Gregory	4190	99.88
Corson	4105	100.00
Edmunds	3850	99.36
Lyman	3815	99.61
Clark	3630	97.71
Hanson	3420	99.85
Bennett	3405	99.27
Jackson	3280	99.55
Stanley	3060	100.00
Hand	3040	99.18
Perkins	2940	98.16
Douglas	2910	99.83
Ziebach	2760	99.82
Aurora	2655	96.37
Sanborn	2365	99.79
Faulk	2315	100.00
McPherson	2305	99.57
Potter	2290	99.13
Miner	2215	100.00
Mellette	2065	100.00
Buffalo	2005	100.00
Jerauld	1970	98.01
Haakon	1935	100.00
Campbell	1455	99.66
Hyde	1445	100.00
Sully	1280	100.00
Harding	1165	98.73
Jones	865	98.86