| PEOPLE | Eureka | Chino Hills | United States |
| Population | 10,189 | 74,799 | 308,035,306 |
| Pop. Density | 984 | 1,674 | 87 |
| Pop. Change | 35.71% | 11.28% | 8.07% |
| Median Age | 36.8 | 36.5 | 37.3 |
| Households | 3,474 | 22,941 | 116,716,292 |
| Household Size | 2.86 | 3.25 | 2.58 |
| Male Population | 49.56% | 49.41% | 49.27% |
| Female Population | 50.44% | 50.59% | 50.96% |
| Married Population | 61.32% | 56.28% | 47.02% |
| Single Population | 38.68% | 43.72% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 7.13% | 5.82% | 6.56% |
| Age 5 to 9 | 9.20% | 7.00% | 6.61% |
| Age 10 to 14 | 9.13% | 8.59% | 6.71% |
| Age 15 to 17 | 5.45% | 5.71% | 4.21% |
| Age 18 to 20 | 2.23% | 3.09% | 2.95% |
| Age 21 to 24 | 3.83% | 6.47% | 7.01% |
| Age 25 to 34 | 10.44% | 11.07% | 13.33% |
| Age 35 to 44 | 16.26% | 15.94% | 13.33% |
| Age 45 to 49 | 16.92% | 18.05% | 14.61% |
| Age 50 to 54 | 16.92% | 18.05% | 14.61% |
| Age 55 to 59 | 9.80% | 11.22% | 11.84% |
| Age 60 to 64 | 9.80% | 11.22% | 11.84% |
| Age 65 to 74 | 4.98% | 4.36% | 7.05% |
| Age 75 to 84 | 2.96% | 2.02% | 4.24% |
| Age 85 and over | 1.68% | 0.66% | 1.78% |
| RACE | | | |
| White | 94.92% | 50.85% | 72.41% |
| Black | 0.81% | 4.57% | 12.61% |
| Asian | 1.90% | 30.32% | 4.75% |
| American Indian | 0.25% | 0.51% | 0.95% |
| Other | 2.12% | 13.76% | 9.28% |
| Hispanic | 9.47% | 38.38% | 16.35% |
| Non-Hispanic | 90.53% | 61.62% | 83.65% |
| FAMILY | | | |
| Married, w/children | 45.94% | 44.21% | 30.42% |
| Married, no children | 37.42% | 37.77% | 42.46% |
| Single, w/children | 10.41% | 8.32% | 14.39% |
| Single, no children | 6.24% | 9.70% | 12.73% |
| Divorced | 6.08% | 6.96% | 10.62% |
| Separated | 4.58% | 3.10% | 4.97% |
| Widowed | 4.31% | 2.85% | 6.14% |
| Now Married | 61.93% | 57.28% | 46.32% |
| Never Married | 23.10% | 29.80% | 31.95% |
