| | West Valley City, UT | Herriman, UT | United States |
| Population | 139,361 | 52,860 | 329,725,481 |
| Female Population | 49.2% | 50.8% | 50.5% |
| Male Population | 50.8% | 49.2% | 49.5% |
| Median Age | 30.1 | 28.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 129,654 | 22,517 | 309,327,143 |
| Population - 2000 | 108,896 | 1,523 | 285,036,114 |
| Population - 1990 | 86,772 | 1,070 | 251,960,433 |
| Pop. 2000 to Now | 23.0% | 3,560.9% | 15.6% |
| Pop. 1990 to Now | 54.3% | 5,110.8% | 30.8% |
| space4 | | | |
| Population Density | 3,929.5 | 2,450.3 | 93.4 |
| Land Area | 35.5 | 21.6 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | West Valley City, UT | Herriman, UT | United States |
| Age 0 to 4 | 8.3% | 9.6% | 5.9% |
| Age 5 to 9 | 8.5% | 11.7% | 6.1% |
| Age 10 to 14 | 8.6% | 9.9% | 6.6% |
| Age 15 to 17 | 5.8% | 5.1% | 3.9% |
| Age 18 to 20 | 4.4% | 3.5% | 4.0% |
| Age 21 to 24 | 5.9% | 4.2% | 5.2% |
| Age 25 to 34 | 15.9% | 16.6% | 13.8% |
| Age 35 to 44 | 13.5% | 16.6% | 12.9% |
| Age 45 to 54 | 11.0% | 11.5% | 12.6% |
| Age 55 to 59 | 5.0% | 4.1% | 6.7% |
| Age 60 to 64 | 4.3% | 2.7% | 6.3% |
| Age 65 to 74 | 5.4% | 3.2% | 9.6% |
| Age 75 to 84 | 2.7% | 1.1% | 4.5% |
| Age 85 and over | 0.6% | 0.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | West Valley City, UT | Herriman, UT | United States |
| White | 45.4% | 83.9% | 59.4% |
| Black | 2.5% | 0.6% | 12.2% |
| Asian | 4.8% | 2.2% | 5.6% |
| Native American | 0.5% | 0.4% | 0.6% |
| Hawaiian, Pacific Islander | 3.7% | 0.7% | 0.2% |
| Other | 0.3% | 0.2% | 0.4% |
| Two or More Races | 2.3% | 4.1% | 3.2% |
| Hispanic | 40.5% | 8.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | West Valley City, UT | Herriman, UT | United States |
| Married Population | 51.1% | 65.0% | 49.8% |
| Currently Married | 48.4% | 64.6% | 48.0% |
| Married but Separated | 2.7% | 0.4% | 1.8% |
| Single Population | 48.9% | 35.0% | 50.2% |
| Never Married | 36.0% | 25.7% | 33.8% |
| Divorced | 9.8% | 6.5% | 10.8% |
| Widowed | 3.1% | 2.8% | 5.6% |
| space5 | | | |
| Household Size | 3.57 | 3.51 | 2.60 |
| Households | 38,933 | 15,045 | 124,010,992 |
| Family Households | 30,770 | 12,357 | 80,755,759 |
| Married couple, w/children | 40.3% | 57.8% | 30.5% |
| Married couple, no children | 30.4% | 29.2% | 42.9% |
| Non Family Households | 8,163 | 2,688 | 43,255,233 |
| Single householder, w/children | 18.0% | 9.2% | 15.8% |
| Single householder, no children | 11.4% | 3.8% | 10.8% |