The graph below ranks each South Dakota County by Average income according to the 2012 census estimates.
South Dakota Average Income by county
| County | Average Income |
| Union |  $37,055 |
| Lincoln | $35,386 |
| Stanley | $31,692 |
| Hughes | $30,208 |
| Miner | $29,854 |
| Haakon | $29,429 |
| Sully | $29,398 |
| McCook | $27,950 |
| Clark | $27,346 |
| Lawrence | $27,275 |
| Pennington | $27,044 |
| Yankton | $26,835 |
| Kingsbury | $26,769 |
| Douglas | $26,756 |
| Deuel | $26,737 |
| Minnehaha | $26,657 |
| Spink | $26,352 |
| Edmunds | $26,173 |
| Moody | $26,149 |
| Walworth | $25,868 |
| Beadle | $25,845 |
| Brown | $25,829 |
| Jerauld | $25,739 |
| Custer | $25,396 |
| Codington | $25,389 |
| Meade | $25,276 |
| Lake | $25,232 |
| Davison | $25,021 |
| Perkins | $25,013 |
| Turner | $24,997 |
| Potter | $24,917 |
| Grant | $24,877 |
| Hutchinson | $24,387 |
| Hamlin | $24,345 |
| Campbell | $24,222 |
| Hyde | $24,076 |
| Fall River | $24,073 |
| Hand | $23,921 |
| Jones | $23,877 |
| Harding | $23,299 |
| Sanborn | $22,973 |
| Brookings | $22,955 |
| Marshall | $22,504 |
| Faulk | $22,394 |
| Gregory | $22,282 |
| Brule | $21,991 |
| McPherson | $21,987 |
| Tripp | $21,796 |
| Aurora | $21,777 |
| Hanson | $21,641 |
| Butte | $21,639 |
| Day | $20,947 |
| Roberts | $20,723 |
| Clay | $20,262 |
| Bon Homme | $20,086 |
| Lyman | $19,659 |
| Charles Mix | $18,555 |
| Jackson | $17,099 |
| Bennett | $16,233 |
| Dewey | $15,811 |
| Corson | $15,166 |
| Mellette | $14,614 |
| Buffalo | $12,953 |
| Ziebach | $12,400 |
| Todd | $11,417 |
| Shannon | $9,136 |