| | Riverton, KS | McAllaster, KS | United States |
| Population | 766 | 47 | 329,725,481 |
| Female Population | 56.5% | 44.7% | 50.5% |
| Male Population | 43.5% | 55.3% | 49.5% |
| Median Age | 39 | 33.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 952 | 25 | 309,327,143 |
| Population - 2000 | 787 | 29 | 285,036,114 |
| Population - 1990 | 718 | 31 | 251,960,433 |
| Pop. 2000 to Now | 31.8% | -13.8% | 15.6% |
| Pop. 1990 to Now | 44.4% | -19.4% | 30.8% |
| space4 | | | |
| Population Density | 341.2 | 0.4 | 93.4 |
| Land Area | 2.2 | 106.4 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Riverton, KS | McAllaster, KS | United States |
| Age 0 to 4 | 18.3% | 4.3% | 5.9% |
| Age 5 to 9 | 9.1% | 21.3% | 6.1% |
| Age 10 to 14 | 2.1% | 0.0% | 6.6% |
| Age 15 to 17 | 0.9% | 14.9% | 3.9% |
| Age 18 to 20 | 1.6% | 0.0% | 4.0% |
| Age 21 to 24 | 5.7% | 0.0% | 5.2% |
| Age 25 to 34 | 9.5% | 10.6% | 13.8% |
| Age 35 to 44 | 6.0% | 25.5% | 12.9% |
| Age 45 to 54 | 11.6% | 6.4% | 12.6% |
| Age 55 to 59 | 4.2% | 6.4% | 6.7% |
| Age 60 to 64 | 6.4% | 0.0% | 6.3% |
| Age 65 to 74 | 16.8% | 6.4% | 9.6% |
| Age 75 to 84 | 5.1% | 4.3% | 4.5% |
| Age 85 and over | 2.6% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Riverton, KS | McAllaster, KS | United States |
| White | 96.2% | 100.0% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 1.4% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.1% | 0.0% | 3.2% |
| Hispanic | 0.3% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Riverton, KS | McAllaster, KS | United States |
| Married Population | 65.2% | 74.3% | 49.8% |
| Currently Married | 65.2% | 74.3% | 48.0% |
| Married but Separated | 0.0% | 0.0% | 1.8% |
| Single Population | 34.8% | 25.7% | 50.2% |
| Never Married | 18.3% | 20.0% | 33.8% |
| Divorced | 11.1% | 0.0% | 10.8% |
| Widowed | 5.4% | 5.7% | 5.6% |
| space5 | | | |
| Household Size | 2.97 | 3.36 | 2.60 |
| Households | 258 | 14 | 124,010,992 |
| Family Households | 192 | 12 | 80,755,759 |
| Married couple, w/children | 19.8% | 58.3% | 30.5% |
| Married couple, no children | 63.0% | 41.7% | 42.9% |
| Non Family Households | 66 | 2 | 43,255,233 |
| Single householder, w/children | 14.1% | 0.0% | 15.8% |
| Single householder, no children | 3.1% | 0.0% | 10.8% |