South Dakota

Harding County Roberts County Perkins County Marshall County Brown County Corson County McPherson County Campbell County Day County Edmunds County Walworth County Ziebach County Dewey County Grant County Butte County Spink County Faulk County Potter County Codington County Clark County Meade County Deuel County Hand County Hyde County Sully County Hamlin County Stanley County Haakon County Lawrence County Beadle County Brookings County Kingsbury County Hughes County Pennington County Moody County Lake County Miner County Sanborn County Lyman County Jerauld County Buffalo County Jones County Jackson County Aurora County Brule County Custer County Minnehaha County McCook County Hanson County Davison County Mellette County Tripp County Shannon County Lincoln County Turner County Fall River County Hutchinson County Douglas County Charles Mix County Gregory County Bennett County Todd County Yankton County Bon Homme County Union County Clay County Clay County

COUNTY 2015 POPULATION SQUARE MILES COUNTY SEAT BOARD SIZE FOUNDED
Aurora County 2,733 713 Plankinton  1881 
Beadle County 18,372 1,265 Huron  1879 
Bennett County 3,423 1,191 Martin  1909 
Bon Homme County 6,985 582 Tyndall  1862 
Brookings County 33,897 805 Brookings  1892 
Brown County 38,785 1,731 Aberdeen  1879 
Brule County 5,281 846 Chamberlain  1875 
Buffalo County 2,095 488 Gann Valley  1873 
Butte County 10,283 2,266 Belle Fourche  1883 
Campbell County 1,397 771 Mound City  1873 
Charles Mix County 9,383 1,150 Lake Andes  1862 
Clark County 3,659 967 Clark  1873 
Clay County 13,964 417 Vermillion  1862 
Codington County 27,939 717 Watertown  1877 
Corson County 4,197 2,530 McIntosh  1909 
Custer County 8,446 1,559 Custer  1875 
Davison County 19,858 437 Mitchell  1873 
Day County 5,539 1,091 Webster  1879 
Deuel County 4,333 637 Clear Lake  1862 
Dewey County 5,685 2,445 Timber Lake  1873 
Douglas County 2,977 434 Armour  1873 
Edmunds County 3,999 1,151 Ipswich  1873 
Fall River County 6,867 1,749 Hot Springs  1883 
Faulk County 2,337 1,006 Faulkton  1873 
Grant County 7,142 688 Milbank  1873 
Gregory County 4,201 1,054 Burke  1862 
Haakon County 1,861 1,827 Philip  1914 
Hamlin County 6,047 538 Hayti  1873 
Hand County 3,348 1,440 Miller  1873 
Hanson County 3,385 435 Alexandria  1873 
Harding County 1,267 2,678 Buffalo  1909 
Hughes County 17,555 801 Pierre  1880 
Hutchinson County 7,301 814 Olivet  1862 
Hyde County 1,397 866 Highmore  1873 
Jackson County 3,321 1,871 Kadoka  1914 
Jerauld County 1,997 533 Wessington Springs  1883 
Jones County 924 971 Murdo  1916 
Kingsbury County 4,990 864 De Smet  1873 
Lake County 12,622 575 Madison  1873 
Lawrence County 24,827 800 Deadwood  1875 
Lincoln County 52,849 578 Canton  1867 
Lyman County 3,876 1,707 Kennebec  1873 
McCook County 5,599 577 Salem  1873 
McPherson County 2,415 1,152 Leola  1873 
Marshall County 4,769 886 Britton  1885 
Meade County 26,986 3,483 Sturgis  1889 
Mellette County 2,050 1,311 White River  1909 
Miner County 2,236 572 Howard  1873 
Minnehaha County 185,197 814 Sioux Falls  1862 
Moody County 6,430 521 Flandreau  1873 
Oglala Lakota County 14,373 2,097 Hot Springs  1875 
Pennington County 108,702 2,784 Rapid City  1875 
Perkins County 3,019 2,890 Bison  1909 
Potter County 2,320 899 Gettysburg  1875 
Roberts County 10,311 1,136 Sisseton  1883 
Sanborn County 2,355 570 Woonsocket  1883 
Spink County 6,524 1,510 Redfield  1873 
Stanley County 2,954 1,517 Fort Pierre  1873 
Sully County 1,426 1,070 Onida  1873 
Todd County 9,959 1,391 Winner  1909 
Tripp County 5,434 1,618 Winner  1873 
Turner County 8,209 618 Parker  1871 
Union County 14,909 467 Elk Point  1862 
Walworth County 5,443 745 Selby  1873 
Yankton County 22,702 532 Yankton  1862 
Ziebach County 2,803 1,971 Dupree  1911 

* consolidated city-county government