Largest Counties in South Dakota

Rank County Population County Seat Established Area (km2) Density
1 Minnehaha County 169,457 Sioux Falls 1862 2,095 80.89
2 Pennington County 100,937 Rapid City 1875 7,190 14.04
3 Lincoln County 44,817 Canton 1867 1,497 29.94
4 Brown County 36,520 Aberdeen 1879 4,437 8.23
5 Brookings County 31,954 Brookings 1862 2,056 15.54
6 Codington County 27,216 Watertown 1877 1,782 15.27
7 Meade County 25,423 Sturgis 1889 8,990 2.83
8 Lawrence County 24,086 Deadwood 1875 2,072 11.62
9 Yankton County 22,427 Yankton 1862 1,352 16.59
10 Davison County 19,493 Mitchell 1873 1,129 17.27
11 Beadle County 17,387 Huron 1879 3,261 5.33
12 Hughes County 17,011 Pierre 1880 1,919 8.86
13 Union County 14,388 Elk Point 1862 1,191 12.08
14 Clay County 13,853 Vermillion 1862 1,067 12.98
15 Oglala Lakota County 13,575 1875 5,423 2.5
16 Lake County 11,189 Madison 1873 1,458 7.67
17 Roberts County 10,138 Sisseton 1883 2,852 3.55
18 Butte County 10,099 Belle Fourche 1883 5,825 1.73
19 Todd County 9,601 1909 3,595 2.67
20 Charles Mix County 9,118 Lake Andes 1862 2,844 3.21
21 Turner County 8,336 Parker 1871 1,598 5.22
22 Custer County 8,205 Custer 1875 4,035 2.03
23 Grant County 7,345 Milbank 1873 1,766 4.16
24 Hutchinson County 7,332 Olivet 1862 2,106 3.48
25 Fall River County 7,083 Hot Springs 1883 4,507 1.57
26 Bon Homme County 7,059 Tyndall 1862 1,458 4.84
27 Moody County 6,475 Flandreau 1873 1,347 4.81
28 Spink County 6,440 Redfield 1873 3,895 1.65
29 Hamlin County 5,892 Hayti 1873 1,323 4.45
30 Day County 5,699 Webster 1879 2,665 2.14
31 Tripp County 5,633 Winner 1873 4,180 1.35
32 McCook County 5,607 Salem 1873 1,489 3.77
33 Walworth County 5,427 Selby 1873 1,834 2.96
34 Dewey County 5,290 Timber Lake 1873 5,965 0.89
35 Brule County 5,244 Chamberlain 1875 2,121 2.47
36 Kingsbury County 5,137 De Smet 1873 2,170 2.37
37 Marshall County 4,645 Britton 1885 2,173 2.14
38 Deuel County 4,353 Clear Lake 1862 1,616 2.69
39 Gregory County 4,260 Burke 1862 2,631 1.62
40 Edmunds County 4,060 Ipswich 1873 2,968 1.37
41 Corson County 4,039 McIntosh 1909 6,405 0.63
42 Lyman County 3,744 Kennebec 1873 4,248 0.88
43 Clark County 3,680 Clark 1873 2,481 1.48
44 Bennett County 3,420 Martin 1909 3,069 1.11
45 Hand County 3,420 Miller 1873 3,722 0.92
46 Hanson County 3,320 Alexandria 1873 1,127 2.95
47 Jackson County 3,020 Kadoka 1914 4,841 0.62
48 Douglas County 2,991 Armour 1873 1,124 2.66
49 Perkins County 2,971 Bison 1909 7,438 0.4
50 Stanley County 2,955 Fort Pierre 1873 3,737 0.79
51 Ziebach County 2,790 Dupree 1911 5,082 0.55
52 Aurora County 2,699 Plankinton 1881 1,834 1.47
53 McPherson County 2,448 Leola 1873 2,945 0.83
54 Miner County 2,378 Howard 1873 1,476 1.61
55 Faulk County 2,353 Faulkton 1873 2,590 0.91
56 Sanborn County 2,344 Woonsocket 1883 1,474 1.59
57 Potter County 2,318 Gettysburg 1875 2,243 1.03
58 Jerauld County 2,059 Wessington Springs 1883 1,373 1.5
59 Mellette County 2,037 White River 1909 3,385 0.6
60 Haakon County 1,926 Philip 1914 4,696 0.41
61 Buffalo County 1,901 Gann Valley 1873 1,220 1.56
62 Campbell County 1,455 Mound City 1873 1,906 0.76
63 Hyde County 1,409 Highmore 1873 2,230 0.63
64 Sully County 1,362 Onida 1873 2,608 0.52
65 Harding County 1,244 Buffalo 1909 6,918 0.18
66 Jones County 995 Murdo 1916 2,515 0.4

Largest Counties in South Dakota

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