| PEOPLE | Lehi | Simi Valley | United States |
| Population | 47,407 | 124,237 | 308,035,306 |
| Pop. Density | 1,800 | 2,995 | 87 |
| Pop. Change | 140.95% | 10.48% | 8.07% |
| Median Age | 24.9 | 37.7 | 37.3 |
| Households | 12,402 | 41,237 | 116,716,292 |
| Household Size | 3.8 | 2.99 | 2.58 |
| Male Population | 50.18% | 49.13% | 49.27% |
| Female Population | 49.82% | 50.87% | 50.96% |
| Married Population | 65.56% | 51.87% | 47.02% |
| Single Population | 34.44% | 48.13% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 15.84% | 6.07% | 6.56% |
| Age 5 to 9 | 13.68% | 6.74% | 6.61% |
| Age 10 to 14 | 9.72% | 7.42% | 6.71% |
| Age 15 to 17 | 4.07% | 4.74% | 4.21% |
| Age 18 to 20 | 2.01% | 2.86% | 2.95% |
| Age 21 to 24 | 4.77% | 6.07% | 7.01% |
| Age 25 to 34 | 20.60% | 12.36% | 13.33% |
| Age 35 to 44 | 13.10% | 14.92% | 13.33% |
| Age 45 to 49 | 6.94% | 16.53% | 14.61% |
| Age 50 to 54 | 6.94% | 16.53% | 14.61% |
| Age 55 to 59 | 4.70% | 11.68% | 11.84% |
| Age 60 to 64 | 4.70% | 11.68% | 11.84% |
| Age 65 to 74 | 2.74% | 6.13% | 7.05% |
| Age 75 to 84 | 1.33% | 3.18% | 4.24% |
| Age 85 and over | 0.50% | 1.30% | 1.78% |
| RACE | | | |
| White | 92.65% | 75.34% | 72.41% |
| Black | 0.38% | 1.40% | 12.61% |
| Asian | 1.36% | 9.30% | 4.75% |
| American Indian | 0.44% | 0.61% | 0.95% |
| Other | 5.16% | 13.35% | 9.28% |
| Hispanic | 0.87% | 34.23% | 16.35% |
| Non-Hispanic | 99.13% | 65.77% | 83.65% |
| FAMILY | | | |
| Married, w/children | 61.87% | 37.59% | 30.42% |
| Married, no children | 26.53% | 40.72% | 42.46% |
| Single, w/children | 6.88% | 10.02% | 14.39% |
| Single, no children | 4.71% | 11.67% | 12.73% |
| Divorced | 6.72% | 11.12% | 10.62% |
| Separated | 2.16% | 3.54% | 4.97% |
| Widowed | 1.97% | 4.17% | 6.14% |
| Now Married | 66.51% | 51.95% | 46.32% |
| Never Married | 22.64% | 29.23% | 31.95% |
