| |
| Age Group | Male | Female | South Dakota, 2000, Universe: 001 Total population Universe Population: 754,844 | ||
| Population | Pct | Population | Pct |  | |
| Total | 374,558 | 49.6 | 380,286 | 50.4 | |
| 0- 4 | 26,142 | 3.5 | 24,927 | 3.3 | |
| 5- 9 | 28,019 | 3.7 | 26,467 | 3.5 | |
| 10-14 | 30,495 | 4.0 | 28,968 | 3.8 | |
| 15-19 | 32,177 | 4.3 | 30,286 | 4.0 | |
| 20-24 | 27,096 | 3.6 | 25,706 | 3.4 | |
| 25-29 | 23,010 | 3.0 | 22,074 | 2.9 | |
| 30-34 | 23,457 | 3.1 | 22,472 | 3.0 | |
| 35-39 | 28,445 | 3.8 | 28,142 | 3.7 | |
| 40-44 | 29,648 | 3.9 | 29,151 | 3.9 | |
| 45-49 | 27,407 | 3.6 | 26,458 | 3.5 | |
| 50-54 | 22,436 | 3.0 | 21,381 | 2.8 | |
| 55-59 | 16,674 | 2.2 | 16,937 | 2.2 | |
| 60-64 | 13,937 | 1.8 | 14,801 | 2.0 | |
| 65-69 | 12,625 | 1.7 | 14,501 | 1.9 | |
| 70-74 | 12,005 | 1.6 | 13,998 | 1.9 | |
| 75-79 | 9,913 | 1.3 | 12,607 | 1.7 | |
| 80-84 | 6,336 | 0.8 | 10,060 | 1.3 | |
| 85+ | 4,736 | 0.6 | 11,350 | 1.5 | |