| | West Haven, UT | Roy, UT | United States |
| Population | 16,918 | 39,076 | 329,725,481 |
| Female Population | 52.0% | 48.5% | 50.5% |
| Male Population | 48.0% | 51.6% | 49.5% |
| Median Age | 28.8 | 32.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 10,424 | 37,555 | 309,327,143 |
| Population - 2000 | 3,976 | 32,885 | 285,036,114 |
| Population - 1990 | 3,717 | 24,603 | 251,960,433 |
| Pop. 2000 to Now | 352.0% | 20.3% | 15.6% |
| Pop. 1990 to Now | 383.5% | 60.8% | 30.8% |
| space4 | | | |
| Population Density | 1,617.3 | 4,966.5 | 93.4 |
| Land Area | 10.5 | 7.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | West Haven, UT | Roy, UT | United States |
| Age 0 to 4 | 8.7% | 7.7% | 5.9% |
| Age 5 to 9 | 8.8% | 7.5% | 6.1% |
| Age 10 to 14 | 10.5% | 9.2% | 6.6% |
| Age 15 to 17 | 6.7% | 4.1% | 3.9% |
| Age 18 to 20 | 3.8% | 4.5% | 4.0% |
| Age 21 to 24 | 7.0% | 4.4% | 5.2% |
| Age 25 to 34 | 13.0% | 16.5% | 13.8% |
| Age 35 to 44 | 17.0% | 14.6% | 12.9% |
| Age 45 to 54 | 12.7% | 9.9% | 12.6% |
| Age 55 to 59 | 3.4% | 5.4% | 6.7% |
| Age 60 to 64 | 2.7% | 5.4% | 6.3% |
| Age 65 to 74 | 3.9% | 6.9% | 9.6% |
| Age 75 to 84 | 1.0% | 3.2% | 4.5% |
| Age 85 and over | 0.7% | 0.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | West Haven, UT | Roy, UT | United States |
| White | 75.0% | 74.9% | 59.4% |
| Black | 0.7% | 0.5% | 12.2% |
| Asian | 1.7% | 1.6% | 5.6% |
| Native American | 0.4% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.3% | 0.2% | 0.2% |
| Other | 0.2% | 0.1% | 0.4% |
| Two or More Races | 3.5% | 2.8% | 3.2% |
| Hispanic | 18.2% | 19.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | West Haven, UT | Roy, UT | United States |
| Married Population | 53.6% | 55.1% | 49.8% |
| Currently Married | 52.2% | 54.0% | 48.0% |
| Married but Separated | 1.4% | 1.1% | 1.8% |
| Single Population | 46.4% | 44.9% | 50.2% |
| Never Married | 33.6% | 28.0% | 33.8% |
| Divorced | 11.0% | 13.6% | 10.8% |
| Widowed | 1.9% | 3.3% | 5.6% |
| space5 | | | |
| Household Size | 3.21 | 3.02 | 2.60 |
| Households | 5,277 | 12,912 | 124,010,992 |
| Family Households | 4,198 | 9,798 | 80,755,759 |
| Married couple, w/children | 48.4% | 36.4% | 30.5% |
| Married couple, no children | 22.7% | 36.8% | 42.9% |
| Non Family Households | 1,079 | 3,114 | 43,255,233 |
| Single householder, w/children | 21.7% | 17.3% | 15.8% |
| Single householder, no children | 7.1% | 9.5% | 10.8% |