| | Sisseton, SD | Peever, SD | United States |
| Population | 2,433 | 175 | 329,725,481 |
| Female Population | 53.1% | 44.0% | 50.5% |
| Male Population | 46.9% | 56.0% | 49.5% |
| Median Age | 34.4 | 30.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,450 | 169 | 309,327,143 |
| Population - 2000 | 2,572 | 209 | 285,036,114 |
| Population - 1990 | 2,181 | 195 | 251,960,433 |
| Pop. 2000 to Now | -7.9% | -22.5% | 15.6% |
| Pop. 1990 to Now | 8.6% | -16.9% | 30.8% |
| space4 | | | |
| Population Density | 1,529.2 | 1,411.3 | 93.4 |
| Land Area | 1.6 | 0.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Sisseton, SD | Peever, SD | United States |
| Age 0 to 4 | 9.7% | 22.3% | 5.9% |
| Age 5 to 9 | 4.4% | 10.3% | 6.1% |
| Age 10 to 14 | 8.9% | 4.0% | 6.6% |
| Age 15 to 17 | 5.3% | 1.7% | 3.9% |
| Age 18 to 20 | 1.9% | 0.0% | 4.0% |
| Age 21 to 24 | 7.7% | 3.4% | 5.2% |
| Age 25 to 34 | 13.1% | 15.4% | 13.8% |
| Age 35 to 44 | 8.9% | 13.7% | 12.9% |
| Age 45 to 54 | 8.1% | 4.6% | 12.6% |
| Age 55 to 59 | 6.9% | 8.0% | 6.7% |
| Age 60 to 64 | 5.5% | 12.0% | 6.3% |
| Age 65 to 74 | 11.4% | 2.9% | 9.6% |
| Age 75 to 84 | 5.1% | 1.7% | 4.5% |
| Age 85 and over | 3.0% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Sisseton, SD | Peever, SD | United States |
| White | 41.1% | 29.1% | 59.4% |
| Black | 0.2% | 0.0% | 12.2% |
| Asian | 0.2% | 0.0% | 5.6% |
| Native American | 49.7% | 62.9% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.2% | 0.0% | 0.4% |
| Two or More Races | 3.8% | 0.0% | 3.2% |
| Hispanic | 4.8% | 8.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Sisseton, SD | Peever, SD | United States |
| Married Population | 35.7% | 30.6% | 49.8% |
| Currently Married | 34.7% | 25.2% | 48.0% |
| Married but Separated | 1.1% | 5.4% | 1.8% |
| Single Population | 64.3% | 69.4% | 50.2% |
| Never Married | 37.6% | 40.5% | 33.8% |
| Divorced | 18.4% | 17.1% | 10.8% |
| Widowed | 8.2% | 11.7% | 5.6% |
| space5 | | | |
| Household Size | 2.48 | 2.73 | 2.60 |
| Households | 961 | 64 | 124,010,992 |
| Family Households | 552 | 37 | 80,755,759 |
| Married couple, w/children | 27.5% | 16.2% | 30.5% |
| Married couple, no children | 31.3% | 21.6% | 42.9% |
| Non Family Households | 409 | 27 | 43,255,233 |
| Single householder, w/children | 31.2% | 59.5% | 15.8% |
| Single householder, no children | 10.0% | 2.7% | 10.8% |