| | Sterling, AK | Blackhawk, SD | United States |
| Population | 6,016 | 3,081 | 329,725,481 |
| Female Population | 46.3% | 48.9% | 50.5% |
| Male Population | 53.7% | 51.1% | 49.5% |
| Median Age | 45.5 | 38.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 5,308 | 2,628 | 309,327,143 |
| Population - 2000 | 4,705 | 2,432 | 285,036,114 |
| Population - 1990 | 3,802 | 1,995 | 251,960,433 |
| Pop. 2000 to Now | 17.1% | 31.6% | 15.6% |
| Pop. 1990 to Now | 45.0% | 60.5% | 30.8% |
| space4 | | | |
| Population Density | 77.4 | 650.3 | 93.4 |
| Land Area | 77.8 | 4.7 | 3,531,905.4 |
| Water Area | 1.9 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Sterling, AK | Blackhawk, SD | United States |
| Age 0 to 4 | 4.8% | 6.1% | 5.9% |
| Age 5 to 9 | 9.4% | 4.6% | 6.1% |
| Age 10 to 14 | 3.1% | 5.7% | 6.6% |
| Age 15 to 17 | 3.4% | 3.1% | 3.9% |
| Age 18 to 20 | 2.3% | 0.0% | 4.0% |
| Age 21 to 24 | 3.4% | 0.6% | 5.2% |
| Age 25 to 34 | 11.8% | 15.5% | 13.8% |
| Age 35 to 44 | 10.5% | 18.5% | 12.9% |
| Age 45 to 54 | 13.2% | 8.7% | 12.6% |
| Age 55 to 59 | 5.5% | 8.2% | 6.7% |
| Age 60 to 64 | 11.9% | 7.0% | 6.3% |
| Age 65 to 74 | 13.4% | 13.0% | 9.6% |
| Age 75 to 84 | 6.0% | 7.9% | 4.5% |
| Age 85 and over | 1.2% | 1.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Sterling, AK | Blackhawk, SD | United States |
| White | 89.5% | 86.0% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.9% | 2.2% | 5.6% |
| Native American | 2.5% | 2.5% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.2% | 0.0% | 0.4% |
| Two or More Races | 5.5% | 0.9% | 3.2% |
| Hispanic | 1.4% | 8.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Sterling, AK | Blackhawk, SD | United States |
| Married Population | 60.1% | 59.4% | 49.8% |
| Currently Married | 59.2% | 59.4% | 48.0% |
| Married but Separated | 0.9% | 0.0% | 1.8% |
| Single Population | 39.9% | 40.6% | 50.2% |
| Never Married | 24.6% | 19.1% | 33.8% |
| Divorced | 11.9% | 18.7% | 10.8% |
| Widowed | 3.4% | 2.8% | 5.6% |
| space5 | | | |
| Household Size | 2.43 | 2.48 | 2.60 |
| Households | 2,463 | 1,240 | 124,010,992 |
| Family Households | 1,606 | 929 | 80,755,759 |
| Married couple, w/children | 31.6% | 23.6% | 30.5% |
| Married couple, no children | 58.2% | 52.0% | 42.9% |
| Non Family Households | 857 | 311 | 43,255,233 |
| Single householder, w/children | 1.9% | 6.6% | 15.8% |
| Single householder, no children | 8.3% | 17.9% | 10.8% |