66 Counties — south dakota
| County | Type | Population | Land area |
|---|
| aurora | County | 3,058 | 708 sq mi |
| beadle | County | 17,023 | 1,259 sq mi |
| bennett | County | 3,574 | 1,185 sq mi |
| bon homme | County | 7,260 | 563 sq mi |
| brookings | County | 28,220 | 795 sq mi |
| brown | County | 35,460 | 1,713 sq mi |
| brule | County | 5,364 | 819 sq mi |
| buffalo | County | 2,032 | 471 sq mi |
| butte | County | 9,094 | 2,249 sq mi |
| campbell | County | 1,782 | 736 sq mi |
| charles mix | County | 9,350 | 1,098 sq mi |
| clark | County | 4,143 | 958 sq mi |
| clay | County | 13,537 | 412 sq mi |
| codington | County | 25,897 | 688 sq mi |
| corson | County | 4,181 | 2,473 sq mi |
| custer | County | 7,275 | 1,558 sq mi |
| davison | County | 18,741 | 436 sq mi |
| day | County | 6,267 | 1,029 sq mi |
| deuel | County | 4,498 | 624 sq mi |
| dewey | County | 5,972 | 2,303 sq mi |
| douglas | County | 3,458 | 434 sq mi |
| edmunds | County | 4,367 | 1,146 sq mi |
| fall river | County | 7,453 | 1,740 sq mi |
| faulk | County | 2,640 | 1,000 sq mi |
| grant | County | 7,847 | 683 sq mi |
| gregory | County | 4,792 | 1,016 sq mi |
| haakon | County | 2,196 | 1,813 sq mi |
| hamlin | County | 5,540 | 511 sq mi |
| hand | County | 3,741 | 1,437 sq mi |
| hanson | County | 3,139 | 435 sq mi |
| harding | County | 1,353 | 2,671 sq mi |
| hughes | County | 16,481 | 741 sq mi |
| hutchinson | County | 8,075 | 813 sq mi |
| hyde | County | 1,671 | 861 sq mi |
| jackson | County | 2,930 | 1,869 sq mi |
| jerauld | County | 2,295 | 530 sq mi |
| jones | County | 1,193 | 971 sq mi |
| kingsbury | County | 5,815 | 838 sq mi |
| lake | County | 11,276 | 563 sq mi |
| lawrence | County | 21,802 | 800 sq mi |
| lincoln | County | 24,131 | 578 sq mi |
| lyman | County | 3,895 | 1,640 sq mi |
| marshall | County | 4,576 | 839 sq mi |
| mccook | County | 5,832 | 575 sq mi |
| mcpherson | County | 2,904 | 1,137 sq mi |
| meade | County | 24,253 | 3,471 sq mi |
| mellette | County | 2,083 | 1,307 sq mi |
| miner | County | 2,884 | 570 sq mi |
| minnehaha | County | 148,281 | 809 sq mi |
| moody | County | 6,595 | 520 sq mi |
| pennington | County | 88,565 | 2,776 sq mi |
| perkins | County | 3,363 | 2,872 sq mi |
| potter | County | 2,693 | 867 sq mi |
| roberts | County | 10,016 | 1,101 sq mi |
| sanborn | County | 2,675 | 569 sq mi |
| shannon | County | 12,466 | 2,094 sq mi |
| spink | County | 7,454 | 1,504 sq mi |
| stanley | County | 2,772 | 1,443 sq mi |
| sully | County | 1,556 | 1,007 sq mi |
| todd | County | 9,050 | 1,388 sq mi |
| tripp | County | 6,430 | 1,614 sq mi |
| turner | County | 8,849 | 617 sq mi |
| union | County | 12,584 | 460 sq mi |
| walworth | County | 5,974 | 708 sq mi |
| yankton | County | 21,652 | 522 sq mi |
| ziebach | County | 2,519 | 1,963 sq mi |