| Județul | Codul FIPS | Sediul comitatului | Stabilit | Formată din | Semnificația numelui | Populația | Zona | Hartă |
| Județul Aurora | 003 | Plankinton | 1881 | Județele Cragin și Wetmore | Aurora, zeița romană a zorilor | 7003271000000000000♠2,710 | 700270800000000000000000000♠708 sq mi (700318340000000000000000000♠1,834 km2 ) |  |
| Județul Beadle | 005 | Huron | 1879 | Județele Buchard, Clark, Kingsbury și Spink | William Henry Harrison Beadle, topograf șef al Teritoriului Dakota | 7004173980000000000♠17,398 | 70031259000000000000000♠1,259 sq mi (7003326100000000000000♠3,261 km2 ) |  |
| Bennett County | 007 | Martin | 1909 | comitatele Lugenbeel, Shannon, Washabaugh și Washington | Granville G. Bennett, judecător la Curtea Supremă pentru Teritoriul Dakota | 7003343100000000000♠3,431 | 70031185000000000000000♠1,185 sq mi (70033069000000000000000♠3,069 km2 ) |  |
| Județul Bon Homme | 009 | Tyndall | 1862 | Teritoriu neorganizat | Cuvânt francez care înseamnă "om bun" | 7003707000000000000♠7,070 | 700256300000000000000000000♠563 sq mi (700314580000000000000000000♠1,458 km2 ) |  |
| Județul Brookings | 011 | Brookings | 1862 | Teritoriu neorganizat | Wilmot Brookings (1830 - 1905), judecător la Curtea Supremă din Dakota Territory | 7004319650000000000♠31,965 | 700279400000000000000000000♠794 sq mi (70032056000000000000000♠2,056 km2 ) |  |
| Județul Brown | 013 | Aberdeen | 1879 | Județul Beadle | Alfred Brown, legislator teritorial | 7004365310000000000♠36,531 | 70031713000000000000000♠1,713 sq mi (70034437000000000000000♠4,437 km2 ) |  |
| Județul Brule | 015 | Chamberlain | 1875 | Județul Charles Mix | Brulé Sioux Native Americans | 7003525500000000000♠5,255 | 700281900000000000000000000♠819 sq mi (700321212100000000000♠2,121 km2 ) |  |
| Buffalo County | 017 | Valea Gann | 1873 | Teritoriu neorganizat | Bizonul american | 7003191200000000000♠1,912 | 700247100000000000000000000♠471 sq mi (700312200000000000000000000♠1,220 km2 ) |  |
| Comitatul Butte | 019 | Belle Fourche | 1883 | Harding | Buttes în regiune | 7004101100000000000♠10,110 | 70032249000000000000000♠2,249 sq mi (70035825000000000000000♠5,825 km2 ) |  |
| Campbell County | 021 | Mound City | 1873 | Buffalo | Newton B. Campbell, legislator teritorial | 7003146600000000000♠1,466 | 700273600000000000000000000♠736 sq mi (70031906000000000000000♠1,906 km2 ) |  |
| Județul Charles Mix | 023 | Lacul Anzi | 1862 | Teritoriu neorganizat | Charles Eli Mix, comisar pentru afaceri indiene | 7003912900000000000♠9,129 | 70031098000000000000000♠1,098 sq mi (70032844000000000000000♠2,844 km2 ) |  |
| Clark County | 025 | Clark | 1873 | Hanson | Newton Clark, legislator teritorial | 7003369100000000000♠3,691 | 700295800000000000000000000♠958 sq mi (70032481000000000000000♠2,481 km2 ) |  |
| Clay County | 027 | Vermillion | 1862 | Teritoriu neorganizat | Henry Clay (1777 - 1852), senator american din Kentucky și personalitate politică proeminentă a secolului al XIX-lea | 7004138640000000000♠13,864 | 700241200000000000000000000♠412 sq mi (700310670000000000000000000♠1,067 km2 ) |  |
| Județul Codington | 029 | Watertown | 1877 | Terenuri indiene | Reverendul G.S. Codington, legislator teritorial | 7004272270000000000♠27,227 | 700268800000000000000000000♠688 sq mi (7003178200000000000♠1,782 km2 ) |  |
| Corson County | 031 | McIntosh | 1909 | Terenuri indiene | Dighton Corson, judecător la Curtea Supremă din Dakota de Sud | 7003405000000000000♠4,050 | 70032473000000000000000♠2,473 sq mi (70036405000000000000000♠6,405 km2 ) |  |
| Custer County | 033 | Custer | 1875 | Terenuri indiene | Generalul George Armstrong Custer (1839 - 1876), figură cheie în Războaiele cu indienii | 7003821600000000000♠8,216 | 70031558000000000000000♠1,558 sq mi (70034035000000000000000♠4,035 km2 ) |  |
| Davison County | 035 | Mitchell | 1873 | Hanson | Henry C. Davison, comerciant proeminent și colonist timpuriu | 7004195040000000000♠19,504 | 700243600000000000000000000♠436 sq mi (700311290000000000000000000♠1,129 km2 ) |  |
| Județul Day | 037 | Webster | 1879 | Clark | Merrit H. Day, legislator teritorial | 7003571000000000000♠5,710 | 70031029000000000000000♠1,029 sq mi (70032665000000000000000♠2,665 km2 ) |  |
| Județul Deuel | 039 | Clear Lake | 1862 | Brookings | Jacob S. Deuel, legislator teritorial | 7003436400000000000♠4,364 | 700262400000000000000000000♠624 sq mi (7003161616000000000000000♠1,616 km2 ) |  |
| Județul Dewey | 041 | Lacul Timber | 1873 | Comitatul Armstrong și pământurile indiene | William P. Dewey, inspector general al teritoriului | 7003530100000000000♠5,301 | 70032303000000000000000♠2,303 sq mi (70035965000000000000000♠5,965 km2 ) |  |
| Douglas County | 043 | Armura | 1873 | Charles Mix | Stephen A. Douglas (1813 - 1861), senator american din Illinois și susținător al suveranității populare ca punct de mijloc în dezbaterea privind sclavia. | 7003300200000000000♠3,002 | 700243400000000000000000000♠434 sq mi (700311240000000000000000000♠1,124 km2 ) |  |
| Județul Edmunds | 045 | Ipswich | 1873 | Buffalo | Newton Edmunds, guvernator al Teritoriului Dakota | 7003407100000000000♠4,071 | 70031146000000000000000♠1,146 sq mi (70032968000000000000000♠2,968 km2 ) |  |
| Județul Fall River | 047 | Hot Springs | 1883 | Custer | Fall River | 7003709400000000000♠7,094 | 700317400000000000000000000♠1,740 sq mi (70034507000000000000000♠4,507 km2 ) |  |
| Faulk County | 049 | Faulkton | 1873 | Terenuri neorganizate | Andrew Jackson Faulk, guvernator al Teritoriului Dakota | 7003236400000000000♠2,364 | 70031000000000000000000♠1,000 sq mi (7003259000000000000000000000000♠2,590 km2 ) |  |
| Grant County | 051 | Milbank | 1873 | Județele Codington și Deuel | Ulysses S. Grant (1822 - 1885), președinte al SUA și general în Războiul Civil American | 7003735600000000000♠7,356 | 70026826820000000000000000♠682 sq mi (70031766000000000000000♠1,766 km2 ) |  |
| Gregory County | 053 | Burke | 1862 | Teritoriu neorganizat | John Shaw Gregory, legislator teritorial | 7003427100000000000♠4,271 | 70031016000000000000000♠1,016 sq mi (70032631000000000000000♠2,631 km2 ) |  |
| Județul Haakon | 055 | Philip | 1914 | Județul Stanley | Regele Haakon al VII-lea al Norvegiei | 7003193700000000000♠1,937 | 70031813000000000000000♠1,813 sq mi (70034696000000000000000♠4,696 km2 ) |  |
| Județul Hamlin | 057 | Hayti | 1873 | Județul Deuel | Hannibal Hamlin, vicepreședinte și senator al Statelor Unite din Maine | 7003590300000000000♠5,903 | 700251100000000000000000000♠511 sq mi (700313230000000000000000000♠1,323 km2 ) |  |
| Județul Hand | 059 | Miller | 1873 | Buffalo County | George H. Hand, legislator teritorial | 7003343100000000000♠3,431 | 70031437000000000000000♠1,437 sq mi (70033722000000000000000♠3,722 km2 ) |  |
| Județul Hanson | 061 | Alexandria | 1873 | Județele Buffalo și Deuel | Joseph R. Hanson, maior de armată în Războaiele cu indienii și colonist timpuriu | 7003333100000000000♠3,331 | 700243500000000000000000000♠435 sq mi (700311270000000000000000000♠1,127 km2 ) |  |
| Județul Harding | 063 | Buffalo | 1909 | Terenuri neorganizate | J.A. Harding, președinte al Camerei pentru Dakota Territory | 7003125500000000000♠1,255 | 70032671000000000000000♠2,671 sq mi (70036918000000000000000♠6,918 km2 ) |  |
| Hughes County | 065 | Pierre | 1880 | Buffalo County | Alexander Hughes, legislator teritorial | 7004170220000000000♠17,022 | 70027410000000000000000♠741 sq mi (7003191919000000000000000♠1,919 km2 ) |  |
| Comitatul Hutchinson | 067 | Olivet | 1862 | Teritoriu neorganizat | John Hutchinson, legislator teritorial | 7003734300000000000♠7,343 | 700281300000000000000000000♠813 sq mi (70032106000000000000000♠2,106 km2 ) |  |
| Județul Hyde | 069 | Highmore | 1873 | Buffalo County | James Hyde, legislator teritorial | 7003142000000000000♠1,420 | 700286100000000000000000000♠861 sq mi (700322300000000000000000000♠2,230 km2 ) |  |
| Județul Jackson | 071 | Kadoka | 1914 | Județul Stanley | J.R. Jackson, legislator teritorial | 7003303100000000000♠3,031 | 70031869000000000000000♠1,869 sq mi (70034841000000000000000♠4,841 km2 ) |  |
| Jerauld County | 073 | Wessington Springs | 1883 | Județul Aurora | H.A. Jerauld, legislator teritorial | 7003207000000000000♠2,070 | 70025300000000000000000♠530 sq mi (70031373000000000000000♠1,373 km2 ) |  |
| Jones County | 075 | Murdo | 1916 | Lyman County | George W. Jones, legislator teritorial | 7003100600000000000♠1,006 | 700297100000000000000000000♠971 sq mi (700325150000000000000000000♠2,515 km2 ) |  |
| Județul Kingsbury | 077 | De Smet | 1873 | Județul Hanson | George W. Kingsbury și T.A. Kingsbury, frați și legislatori teritoriali | 7003514800000000000♠5,148 | 700283800000000000000000000♠838 sq mi (700321700000000000000000000♠2,170 km2 ) |  |
| Comitatul Lake | 079 | Madison | 1873 | Județele Brookings și Hanson | Lacuri în județ | 7004112000000000000♠11,200 | 700256300000000000000000000♠563 sq mi (700314580000000000000000000♠1,458 km2 ) |  |
| Județul Lawrence | 081 | Deadwood | 1875 | Teritoriu neorganizat | John Lawrence (1839 - 1889), legislator teritorial | 7004240970000000000♠24,097 | 70028000000000000000000♠800 sq mi (700320720000000000000000000♠2,072 km2 ) |  |
| Lincoln County | 083 | Canton | 1867 | Teritoriu neorganizat | Lincoln County, Maine | 7004448280000000000♠44,828 | 700257800000000000000000000♠578 sq mi (700314970000000000000000000♠1,497 km2 ) |  |
| Lyman County | 085 | Kennebec | 1873 | Teritoriu neorganizat | W.P. Lyman, legislator teritorial | 7003375500000000000♠3,755 | 700316400000000000000000000♠1,640 sq mi (70034248000000000000000♠4,248 km2 ) |  |
| Marshall County | 091 | Britton | 1885 | Județul Day | Marshall Vincent, comisar al comitatului Day | 7003465600000000000♠4,656 | 700283900000000000000000000♠839 sq mi (700321730000000000000000000♠2,173 km2 ) |  |
| Comitatul McCook | 087 | Salem | 1873 | Județul Hanson | Edwin McCook, secretar al Teritoriului Dakota | 7003561800000000000♠5,618 | 700257500000000000000000000♠575 sq mi (700314890000000000000000000♠1,489 km2 ) |  |
| Comitatul McPherson | 089 | Leola | 1873 | Buffalo County | James B. McPherson (1828 - 1864), general în Războiul Civil | 7003245900000000000♠2,459 | 70031137000000000000000♠1,137 sq mi (70032945000000000000000♠2,945 km2 ) |  |
| Județul Meade | 093 | Sturgis | 1889 | Județul Lawrence | George G. Meade (1815 - 1872), general din Războiul Civil | 7004254340000000000♠25,434 | 70033471000000000000000♠3,471 sq mi (700389900000000000000000000♠8,990 km2 ) |  |
| Județul Mellette | 095 | Râul Alb | 1909 | Lyman County | Arthur C. Mellette, primul guvernator al statului Dakota de Sud | 7003204800000000000♠2,048 | 70031307000000000000000♠1,307 sq mi (70033385000000000000000♠3,385 km2 ) |  |
| Județul Miner | 097 | Howard | 1873 | Județul Hanson | Nelson Miner și Ephriam Miner, frați și legislatori teritoriali | 7003238900000000000♠2,389 | 70025700000000000000000♠570 sq mi (70031476000000000000000♠1,476 km2 ) |  |
| Comitatul Minnehaha | 099 | Sioux Falls | 1862 | Teritoriu neorganizat | Termen sioux pentru cascadă | 7005169468000000000♠169,468 | 700280900000000000000000000♠809 sq mi (700320950000000000000000000♠2,095 km2 ) |  |
| Județul Moody | 101 | Flandreau | 1873 | Județele Brookings și Minnehaha | Gideon C. Moody, președinte al Camerei din Dakota Territory | 7003648600000000000♠6,486 | 7002520000000000000♠520 sq mi (70031347000000000000000♠1,347 km2 ) |  |
| Comitatul Oglala Lakota | 102 | Hot Springs | 1875 | Județul Fall River | Tribul Oglala Lakota | 7004135860000000000♠13,586 | 70032094000000000000000♠2,094 sq mi (70035423000000000000000♠5,423 km2 ) |  |
| Județul Pennington | 103 | Rapid City | 1875 | Teritoriu neorganizat | John L. Pennington (1821 - 1900), guvernator al Teritoriului Dakota | 7005100948000000000♠100,948 | 70032776000000000000000♠2,776 sq mi (700371900000000000000000000♠7,190 km2 ) |  |
| Județul Perkins | 105 | Bison | 1909 | Județele Butte și Harding | Henry E. Perkins, senator de stat | 7003298200000000000♠2,982 | 70032872000000000000000♠2,872 sq mi (70037438000000000000000♠7,438 km2 ) |  |
| Potter County | 107 | Gettysburg | 1875 | Buffalo County | Joel A. Potter, legislator teritorial | 7003232900000000000♠2,329 | 700286600000000000000000000♠866 sq mi (700322430000000000000000000♠2,243 km2 ) |  |
| Roberts County | 109 | Sisseton | 1883 | Grant County | S.G. Roberts, legislator teritorial | 7004101490000000000♠10,149 | 70031101000000000000000♠1,101 sq mi (70032852000000000000000♠2,852 km2 ) |  |
| Județul Sanborn | 111 | Woonsocket | 1883 | Județul Miner | George W. Sanborn, președinte al Căii Ferate Milwaukee | 7003235500000000000♠2,355 | 700256900000000000000000000♠569 sq mi (700314740000000000000000000♠1,474 km2 ) |  |
| Spink County | 115 | Redfield | 1873 | Județul Hanson | S.L. Spink, secretar al Teritoriului Dakota | 7003645100000000000♠6,451 | 70031504000000000000000♠1,504 sq mi (70033895000000000000000♠3,895 km2 ) |  |
| Județul Stanley | 117 | Fort Pierre | 1873 | Teritoriu neorganizat | David S. Stanley, comandantul Fort Sully | 7003296600000000000♠2,966 | 70031443000000000000000♠1,443 sq mi (70033737000000000000000♠3,737 km2 ) |  |
| Județul Sully | 119 | Onida | 1873 | Potter County | Fortul Sully, numit la rândul său după generalul Alfred Sully | 7003137300000000000♠1,373 | 70031007000000000000000♠1,007 sq mi (70032608000000000000000♠2,608 km2 ) |  |
| Todd County | 121 | Câștigător | 1909 | Județele Meyer și Tripp | John Blair Smith Todd, delegat teritorial la Congres | 7003961200000000000♠9,612 | 70031388000000000000000♠1,388 sq mi (70033595000000000000000♠3,595 km2 ) |  |
| Județul Tripp | 123 | Câștigător | 1873 | Teritoriu neorganizat | Bartlett Tripp, președinte al Curții Supreme a teritoriului Dakota | 7003564400000000000♠5,644 | 70031614000000000000000♠1,614 sq mi (700341800000000000000000000♠4,180 km2 ) |  |
| Turner County | 125 | Parker | 1871 | Lincoln County | John W. Turner, legislator teritorial | 7003834700000000000♠8,347 | 700261700000000000000000000♠617 sq mi (700315980000000000000000000♠1,598 km2 ) |  |
| Județul Union | 127 | Elk Point | 1862 | Teritoriu neorganizat | Uniunea statelor americane | 7004143990000000000♠14,399 | 7002460000000000000♠460 sq mi (7003119100000000000♠1,191 km2 ) |  |
| Comitatul Walworth | 129 | Selby | 1873 | Buffalo County | Comitatul Walworth, Wisconsin | 7003543800000000000♠5,438 | 700270800000000000000000000♠708 sq mi (700318340000000000000000000♠1,834 km2 ) |  |
| Județul Yankton | 135 | Yankton | 1862 | Teritoriu neorganizat | Americanii nativi Yankton Sioux | 7004224380000000000♠22,438 | 700252200000000000000000000♠522 sq mi (70031352000000000000000♠1,352 km2 ) |  |
| Județul Ziebach | 137 | Dupree | 1911 | Comitatele Armstrong, Schnasse și Sterling | Frank M. Ziebach, editor și maior de armată în timpul războaielor indiene | 7003280100000000000♠2,801 | 7003196200200000000000♠1,962 sq mi (7003508200000000000♠5,082 km2 ) |  |