| | Dallas, SD | Ainsworth, NE | United States |
| Population | 116 | 1,432 | 329,725,481 |
| Female Population | 42.2% | 58.3% | 50.5% |
| Male Population | 57.8% | 41.7% | 49.5% |
| Median Age | 46.3 | 51.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 120 | 1,736 | 309,327,143 |
| Population - 2000 | 144 | 1,862 | 285,036,114 |
| Population - 1990 | 142 | 1,870 | 251,960,433 |
| Pop. 2000 to Now | -12.5% | -12.5% | 15.6% |
| Pop. 1990 to Now | -11.3% | -12.8% | 30.8% |
| space4 | | | |
| Population Density | 228.8 | 1,426.3 | 93.4 |
| Land Area | 0.5 | 1.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Dallas, SD | Ainsworth, NE | United States |
| Age 0 to 4 | 1.7% | 8.0% | 5.9% |
| Age 5 to 9 | 3.4% | 5.9% | 6.1% |
| Age 10 to 14 | 6.0% | 1.8% | 6.6% |
| Age 15 to 17 | 0.0% | 1.3% | 3.9% |
| Age 18 to 20 | 0.0% | 0.7% | 4.0% |
| Age 21 to 24 | 0.0% | 4.5% | 5.2% |
| Age 25 to 34 | 24.1% | 9.6% | 13.8% |
| Age 35 to 44 | 13.8% | 10.3% | 12.9% |
| Age 45 to 54 | 23.3% | 12.7% | 12.6% |
| Age 55 to 59 | 5.2% | 1.8% | 6.7% |
| Age 60 to 64 | 8.6% | 13.6% | 6.3% |
| Age 65 to 74 | 6.0% | 18.7% | 9.6% |
| Age 75 to 84 | 4.3% | 7.3% | 4.5% |
| Age 85 and over | 3.4% | 3.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Dallas, SD | Ainsworth, NE | United States |
| White | 100.0% | 90.4% | 59.4% |
| Black | 0.0% | 0.1% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 3.7% | 3.2% |
| Hispanic | 0.0% | 5.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Dallas, SD | Ainsworth, NE | United States |
| Married Population | 29.1% | 50.5% | 49.8% |
| Currently Married | 29.1% | 50.1% | 48.0% |
| Married but Separated | 0.0% | 0.4% | 1.8% |
| Single Population | 70.9% | 49.5% | 50.2% |
| Never Married | 52.4% | 15.7% | 33.8% |
| Divorced | 8.7% | 19.1% | 10.8% |
| Widowed | 9.7% | 14.7% | 5.6% |
| space5 | | | |
| Household Size | 3.05 | 1.97 | 2.60 |
| Households | 38 | 712 | 124,010,992 |
| Family Households | 27 | 348 | 80,755,759 |
| Married couple, w/children | 29.6% | 18.1% | 30.5% |
| Married couple, no children | 25.9% | 66.7% | 42.9% |
| Non Family Households | 11 | 364 | 43,255,233 |
| Single householder, w/children | 0.0% | 11.5% | 15.8% |
| Single householder, no children | 44.4% | 3.7% | 10.8% |