| | Hazel, SD | Salem, SD | United States |
| Population | 150 | 1,221 | 329,725,481 |
| Female Population | 42.7% | 43.2% | 50.5% |
| Male Population | 57.3% | 56.8% | 49.5% |
| Median Age | 22 | 44.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 91 | 1,347 | 309,327,143 |
| Population - 2000 | 105 | 1,371 | 285,036,114 |
| Population - 1990 | 103 | 1,289 | 251,960,433 |
| Pop. 2000 to Now | -18.1% | -8.0% | 15.6% |
| Pop. 1990 to Now | -16.5% | -2.2% | 30.8% |
| space4 | | | |
| Population Density | 619.8 | 976.8 | 93.4 |
| Land Area | 0.2 | 1.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Hazel, SD | Salem, SD | United States |
| Age 0 to 4 | 20.7% | 3.4% | 5.9% |
| Age 5 to 9 | 11.3% | 8.7% | 6.1% |
| Age 10 to 14 | 8.7% | 8.9% | 6.6% |
| Age 15 to 17 | 8.0% | 7.7% | 3.9% |
| Age 18 to 20 | 0.0% | 1.1% | 4.0% |
| Age 21 to 24 | 6.7% | 3.8% | 5.2% |
| Age 25 to 34 | 10.0% | 7.0% | 13.8% |
| Age 35 to 44 | 4.0% | 9.7% | 12.9% |
| Age 45 to 54 | 6.7% | 9.0% | 12.6% |
| Age 55 to 59 | 14.0% | 6.2% | 6.7% |
| Age 60 to 64 | 6.0% | 8.6% | 6.3% |
| Age 65 to 74 | 2.0% | 14.2% | 9.6% |
| Age 75 to 84 | 1.3% | 7.0% | 4.5% |
| Age 85 and over | 0.7% | 4.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Hazel, SD | Salem, SD | United States |
| White | 94.7% | 89.7% | 59.4% |
| Black | 2.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 5.6% | 3.2% |
| Hispanic | 3.3% | 4.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Hazel, SD | Salem, SD | United States |
| Married Population | 49.4% | 60.9% | 49.8% |
| Currently Married | 48.3% | 60.0% | 48.0% |
| Married but Separated | 1.1% | 0.9% | 1.8% |
| Single Population | 50.6% | 39.1% | 50.2% |
| Never Married | 22.5% | 20.9% | 33.8% |
| Divorced | 25.8% | 11.6% | 10.8% |
| Widowed | 2.2% | 6.5% | 5.6% |
| space5 | | | |
| Household Size | 3.66 | 2.37 | 2.60 |
| Households | 41 | 493 | 124,010,992 |
| Family Households | 21 | 332 | 80,755,759 |
| Married couple, w/children | 61.9% | 28.3% | 30.5% |
| Married couple, no children | 23.8% | 57.5% | 42.9% |
| Non Family Households | 20 | 161 | 43,255,233 |
| Single householder, w/children | 14.3% | 12.3% | 15.8% |
| Single householder, no children | 0.0% | 1.8% | 10.8% |