| | Fife, WA | Lehi, UT | United States |
| Population | 10,869 | 73,911 | 329,725,481 |
| Female Population | 47.7% | 49.8% | 50.5% |
| Male Population | 52.3% | 50.2% | 49.5% |
| Median Age | 31.6 | 26.1 | 38.4 |
| space3 | | | |
| Population - 2010 | 9,346 | 48,162 | 309,327,143 |
| Population - 2000 | 4,784 | 19,028 | 285,036,114 |
| Population - 1990 | 3,864 | 8,475 | 251,960,433 |
| Pop. 2000 to Now | 118.6% | 285.7% | 15.6% |
| Pop. 1990 to Now | 170.7% | 765.9% | 30.8% |
| space4 | | | |
| Population Density | 1,898.2 | 2,646.2 | 93.4 |
| Land Area | 5.7 | 27.9 | 3,531,905.4 |
| Water Area | 0.1 | 0.4 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Fife, WA | Lehi, UT | United States |
| Age 0 to 4 | 6.8% | 10.6% | 5.9% |
| Age 5 to 9 | 9.6% | 12.1% | 6.1% |
| Age 10 to 14 | 6.4% | 10.8% | 6.6% |
| Age 15 to 17 | 3.0% | 5.5% | 3.9% |
| Age 18 to 20 | 2.6% | 4.3% | 4.0% |
| Age 21 to 24 | 6.0% | 5.5% | 5.2% |
| Age 25 to 34 | 23.4% | 14.2% | 13.8% |
| Age 35 to 44 | 14.2% | 16.7% | 12.9% |
| Age 45 to 54 | 9.5% | 8.5% | 12.6% |
| Age 55 to 59 | 5.9% | 3.8% | 6.7% |
| Age 60 to 64 | 4.9% | 2.4% | 6.3% |
| Age 65 to 74 | 5.5% | 3.4% | 9.6% |
| Age 75 to 84 | 1.8% | 1.8% | 4.5% |
| Age 85 and over | 0.5% | 0.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Fife, WA | Lehi, UT | United States |
| White | 42.6% | 86.1% | 59.4% |
| Black | 10.6% | 0.4% | 12.2% |
| Asian | 14.4% | 1.8% | 5.6% |
| Native American | 1.9% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 6.1% | 0.5% | 0.2% |
| Other | 0.2% | 0.1% | 0.4% |
| Two or More Races | 7.8% | 3.0% | 3.2% |
| Hispanic | 16.3% | 8.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Fife, WA | Lehi, UT | United States |
| Married Population | 48.0% | 67.0% | 49.8% |
| Currently Married | 46.3% | 66.5% | 48.0% |
| Married but Separated | 1.7% | 0.5% | 1.8% |
| Single Population | 52.0% | 33.0% | 50.2% |
| Never Married | 35.9% | 26.4% | 33.8% |
| Divorced | 12.6% | 4.4% | 10.8% |
| Widowed | 3.4% | 2.2% | 5.6% |
| space5 | | | |
| Household Size | 2.64 | 3.77 | 2.60 |
| Households | 4,095 | 19,565 | 124,010,992 |
| Family Households | 2,511 | 16,715 | 80,755,759 |
| Married couple, w/children | 38.7% | 61.1% | 30.5% |
| Married couple, no children | 32.9% | 31.0% | 42.9% |
| Non Family Households | 1,584 | 2,850 | 43,255,233 |
| Single householder, w/children | 16.8% | 4.1% | 15.8% |
| Single householder, no children | 11.5% | 3.9% | 10.8% |