| PEOPLE | Penn Valley | Fontana | United States |
| Population | 1,621 | 196,069 | 308,035,306 |
| Pop. Density | 764 | 4,621 | 87 |
| Pop. Change | 12.81% | 37.62% | 8.07% |
| Median Age | 44.5 | 28.7 | 37.3 |
| Households | 628 | 49,116 | 116,716,292 |
| Household Size | 2.56 | 4 | 2.58 |
| Male Population | 48.37% | 49.68% | 49.27% |
| Female Population | 51.63% | 50.32% | 50.96% |
| Married Population | 49.72% | 46.63% | 47.02% |
| Single Population | 50.28% | 53.37% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 4.87% | 8.58% | 6.56% |
| Age 5 to 9 | 6.29% | 8.78% | 6.61% |
| Age 10 to 14 | 6.79% | 9.45% | 6.71% |
| Age 15 to 17 | 4.44% | 6.10% | 4.21% |
| Age 18 to 20 | 2.90% | 3.79% | 2.95% |
| Age 21 to 24 | 5.49% | 7.93% | 7.01% |
| Age 25 to 34 | 8.95% | 14.47% | 13.33% |
| Age 35 to 44 | 10.86% | 14.93% | 13.33% |
| Age 45 to 49 | 15.36% | 12.71% | 14.61% |
| Age 50 to 54 | 15.36% | 12.71% | 14.61% |
| Age 55 to 59 | 15.85% | 7.60% | 11.84% |
| Age 60 to 64 | 15.85% | 7.60% | 11.84% |
| Age 65 to 74 | 9.38% | 3.44% | 7.05% |
| Age 75 to 84 | 5.92% | 1.70% | 4.24% |
| Age 85 and over | 2.90% | 0.52% | 1.78% |
| RACE | | | |
| White | 88.46% | 47.42% | 72.41% |
| Black | 0.56% | 9.98% | 12.61% |
| Asian | 1.42% | 6.60% | 4.75% |
| American Indian | 2.10% | 1.00% | 0.95% |
| Other | 7.46% | 34.99% | 9.28% |
| Hispanic | 6.53% | 37.71% | 16.35% |
| Non-Hispanic | 93.47% | 62.29% | 83.65% |
| FAMILY | | | |
| Married, w/children | 22.40% | 43.75% | 30.42% |
| Married, no children | 47.11% | 27.51% | 42.46% |
| Single, w/children | 16.17% | 15.69% | 14.39% |
| Single, no children | 14.32% | 13.05% | 12.73% |
| Divorced | 15.87% | 7.18% | 10.62% |
| Separated | 1.15% | 6.51% | 4.97% |
| Widowed | 5.35% | 3.19% | 6.14% |
| Now Married | 49.10% | 46.97% | 46.32% |
| Never Married | 28.54% | 36.15% | 31.95% |
