| | Riverdale, UT | Sunset, UT | United States |
| Population | 9,279 | 5,454 | 329,725,481 |
| Female Population | 50.2% | 51.6% | 50.5% |
| Male Population | 49.8% | 48.4% | 49.5% |
| Median Age | 29.3 | 30.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 8,505 | 5,159 | 309,327,143 |
| Population - 2000 | 7,656 | 5,204 | 285,036,114 |
| Population - 1990 | 6,419 | 5,128 | 251,960,433 |
| Pop. 2000 to Now | 17.4% | 2.5% | 15.6% |
| Pop. 1990 to Now | 40.0% | 4.1% | 30.8% |
| space4 | | | |
| Population Density | 1,982.3 | 3,733.1 | 93.4 |
| Land Area | 4.7 | 1.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Riverdale, UT | Sunset, UT | United States |
| Age 0 to 4 | 9.6% | 8.2% | 5.9% |
| Age 5 to 9 | 7.8% | 6.4% | 6.1% |
| Age 10 to 14 | 7.0% | 9.1% | 6.6% |
| Age 15 to 17 | 4.0% | 2.7% | 3.9% |
| Age 18 to 20 | 5.0% | 5.5% | 4.0% |
| Age 21 to 24 | 7.3% | 9.3% | 5.2% |
| Age 25 to 34 | 16.6% | 16.7% | 13.8% |
| Age 35 to 44 | 12.7% | 11.4% | 12.9% |
| Age 45 to 54 | 9.0% | 11.3% | 12.6% |
| Age 55 to 59 | 3.1% | 3.8% | 6.7% |
| Age 60 to 64 | 6.1% | 5.2% | 6.3% |
| Age 65 to 74 | 6.8% | 6.5% | 9.6% |
| Age 75 to 84 | 4.4% | 3.2% | 4.5% |
| Age 85 and over | 0.8% | 0.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Riverdale, UT | Sunset, UT | United States |
| White | 74.7% | 72.5% | 59.4% |
| Black | 0.3% | 0.6% | 12.2% |
| Asian | 1.8% | 1.4% | 5.6% |
| Native American | 0.1% | 0.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 1.3% | 4.6% | 3.2% |
| Hispanic | 21.8% | 19.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Riverdale, UT | Sunset, UT | United States |
| Married Population | 58.5% | 44.6% | 49.8% |
| Currently Married | 57.7% | 42.2% | 48.0% |
| Married but Separated | 0.9% | 2.4% | 1.8% |
| Single Population | 41.5% | 55.4% | 50.2% |
| Never Married | 26.8% | 32.8% | 33.8% |
| Divorced | 9.7% | 18.4% | 10.8% |
| Widowed | 5.0% | 4.2% | 5.6% |
| space5 | | | |
| Household Size | 2.81 | 3.29 | 2.60 |
| Households | 3,302 | 1,652 | 124,010,992 |
| Family Households | 2,405 | 1,148 | 80,755,759 |
| Married couple, w/children | 40.2% | 38.1% | 30.5% |
| Married couple, no children | 40.9% | 26.0% | 42.9% |
| Non Family Households | 897 | 504 | 43,255,233 |
| Single householder, w/children | 12.4% | 20.4% | 15.8% |
| Single householder, no children | 6.4% | 15.5% | 10.8% |