| PEOPLE | Jacksonville | Discovery Bay | United States |
| Population | 821,784 | 13,352 | 308,035,306 |
| Pop. Density | 1,100 | 2,147 | 87 |
| Pop. Change | 12.82% | 44.81% | 8.07% |
| Median Age | 35.5 | 39.5 | 37.3 |
| Households | 323,106 | 4,702 | 116,716,292 |
| Household Size | 2.48 | 2.81 | 2.58 |
| Male Population | 48.47% | 50.25% | 49.27% |
| Female Population | 51.53% | 49.75% | 50.96% |
| Married Population | 43.81% | 63.15% | 47.02% |
| Single Population | 56.19% | 36.85% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 7.00% | 6.54% | 6.56% |
| Age 5 to 9 | 6.51% | 7.73% | 6.61% |
| Age 10 to 14 | 6.46% | 8.23% | 6.71% |
| Age 15 to 17 | 3.92% | 4.37% | 4.21% |
| Age 18 to 20 | 2.89% | 2.31% | 2.95% |
| Age 21 to 24 | 7.63% | 3.95% | 7.01% |
| Age 25 to 34 | 14.88% | 10.04% | 13.33% |
| Age 35 to 44 | 13.57% | 16.71% | 13.33% |
| Age 45 to 49 | 14.79% | 16.86% | 14.61% |
| Age 50 to 54 | 14.79% | 16.86% | 14.61% |
| Age 55 to 59 | 11.41% | 12.13% | 11.84% |
| Age 60 to 64 | 11.41% | 12.13% | 11.84% |
| Age 65 to 74 | 6.09% | 7.79% | 7.05% |
| Age 75 to 84 | 3.42% | 2.76% | 4.24% |
| Age 85 and over | 1.43% | 0.58% | 1.78% |
| RACE | | | |
| White | 59.44% | 81.70% | 72.41% |
| Black | 30.72% | 4.12% | 12.61% |
| Asian | 4.29% | 3.91% | 4.75% |
| American Indian | 0.40% | 0.64% | 0.95% |
| Other | 5.16% | 9.62% | 9.28% |
| Hispanic | 5.16% | 17.93% | 16.35% |
| Non-Hispanic | 94.84% | 82.07% | 83.65% |
| FAMILY | | | |
| Married, w/children | 26.57% | 36.73% | 30.42% |
| Married, no children | 38.84% | 47.20% | 42.46% |
| Single, w/children | 18.85% | 10.21% | 14.39% |
| Single, no children | 15.74% | 5.87% | 12.73% |
| Divorced | 13.33% | 8.74% | 10.62% |
| Separated | 5.34% | 4.52% | 4.97% |
| Widowed | 5.91% | 2.65% | 6.14% |
| Now Married | 44.69% | 62.00% | 46.32% |
| Never Married | 30.72% | 22.10% | 31.95% |
