Official Voter Registration Totals for 2006 South Dakota General Election
| October 23, 2006 | Total | Total | |||||
| Active | Active | Active | Active | Active | Active | Inactive | |
| Registration | Republican | Democratic | Libertarian | Constitution | Other | Registration | |
| AURORA | 2005 | 815 | 1059 | 1 | 0 | 130 | 114 |
| BEADLE | 11285 | 4727 | 4906 | 31 | 5 | 1616 | 837 |
| BENNETT | 2382 | 776 | 1389 | 2 | 0 | 215 | 147 |
| BON HOMME | 4341 | 2087 | 1807 | 2 | 0 | 445 | 95 |
| BROOKINGS | 17837 | 7835 | 6048 | 58 | 5 | 3891 | 2090 |
| BROWN | 23640 | 9934 | 10557 | 35 | 2 | 3112 | 1719 |
| BRULE | 3417 | 1357 | 1672 | 2 | 6 | 380 | 127 |
| BUFFALO | 1196 | 181 | 898 | 0 | 0 | 117 | 33 |
| BUTTE | 5706 | 3641 | 1228 | 35 | 9 | 793 | 1003 |
| CAMPBELL | 1243 | 992 | 193 | 4 | 4 | 50 | 129 |
| CHARLES MIX | 6016 | 2101 | 3431 | 2 | 0 | 482 | 558 |
| CLARK | 2865 | 1616 | 1032 | 2 | 0 | 215 | 151 |
| CLAY | 8738 | 3048 | 3735 | 27 | 0 | 1928 | 1823 |
| CODINGTON | 16495 | 7340 | 6603 | 20 | 2 | 2530 | 1192 |
| CORSON | 2658 | 769 | 1575 | 10 | 0 | 304 | 95 |
| CUSTER | 5788 | 3436 | 1351 | 17 | 15 | 969 | 445 |
| DAVISON | 11479 | 5473 | 4478 | 14 | 10 | 1504 | 457 |
| DAY | 4577 | 1689 | 2412 | 0 | 2 | 474 | 245 |
| DEUEL | 3022 | 1291 | 1221 | 2 | 4 | 504 | 175 |
| DEWEY | 3806 | 829 | 2564 | 4 | 0 | 409 | 422 |
| DOUGLAS | 2317 | 1698 | 494 | 0 | 0 | 125 | 78 |
| EDMUNDS | 2901 | 1451 | 1218 | 3 | 2 | 227 | 144 |
| FALL RIVER | 5266 | 2847 | 1476 | 24 | 3 | 916 | 454 |
| FAULK | 1725 | 861 | 605 | 0 | 0 | 259 | 69 |
| GRANT | 5212 | 2349 | 2016 | 1 | 1 | 845 | 436 |
| GREGORY | 3398 | 1710 | 1427 | 3 | 0 | 258 | 160 |
| HAAKON | 1555 | 1167 | 311 | 0 | 2 | 75 | 66 |
| HAMLIN | 3706 | 2115 | 1182 | 2 | 3 | 404 | 220 |
| HAND | 2737 | 1488 | 1015 | 1 | 0 | 233 | 211 |
| HANSON | 3268 | 1351 | 1191 | 6 | 1 | 719 | 89 |
| HARDING | 982 | 776 | 160 | 0 | 0 | 46 | 51 |
| HUGHES | 11052 | 7166 | 2715 | 18 | 5 | 1148 | 1307 |
| HUTCHINSON | 5238 | 3545 | 1333 | 8 | 2 | 350 | 431 |
| HYDE | 1163 | 751 | 354 | 0 | 0 |