| PEOPLE | San Diego | El Cajon | United States |
| Population | 1,307,402 | 99,478 | 308,035,306 |
| Pop. Density | 4,020 | 6,892 | 87 |
| Pop. Change | 8.05% | 4.71% | 8.07% |
| Median Age | 33.7 | 33.7 | 37.3 |
| Households | 483,092 | 34,134 | 116,716,292 |
| Household Size | 2.6 | 2.85 | 2.58 |
| Male Population | 50.53% | 48.89% | 49.27% |
| Female Population | 49.47% | 51.11% | 50.96% |
| Married Population | 39.98% | 41.27% | 47.02% |
| Single Population | 60.02% | 58.73% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 6.18% | 7.64% | 6.56% |
| Age 5 to 9 | 5.74% | 6.72% | 6.61% |
| Age 10 to 14 | 5.76% | 6.82% | 6.71% |
| Age 15 to 17 | 3.68% | 4.53% | 4.21% |
| Age 18 to 20 | 3.26% | 3.13% | 2.95% |
| Age 21 to 24 | 9.79% | 8.18% | 7.01% |
| Age 25 to 34 | 17.61% | 14.68% | 13.33% |
| Age 35 to 44 | 14.05% | 12.89% | 13.33% |
| Age 45 to 49 | 13.16% | 14.33% | 14.61% |
| Age 50 to 54 | 13.16% | 14.33% | 14.61% |
| Age 55 to 59 | 10.08% | 10.10% | 11.84% |
| Age 60 to 64 | 10.08% | 10.10% | 11.84% |
| Age 65 to 74 | 5.51% | 5.59% | 7.05% |
| Age 75 to 84 | 3.57% | 3.70% | 4.24% |
| Age 85 and over | 1.60% | 1.70% | 1.78% |
| RACE | | | |
| White | 58.89% | 69.26% | 72.41% |
| Black | 6.73% | 6.34% | 12.61% |
| Asian | 15.91% | 3.58% | 4.75% |
| American Indian | 0.59% | 0.84% | 0.95% |
| Other | 17.89% | 19.98% | 9.28% |
| Hispanic | 0.00% | 11.40% | 16.35% |
| Non-Hispanic | 100.00% | 88.60% | 83.65% |
| FAMILY | | | |
| Married, w/children | 33.38% | 33.35% | 30.42% |
| Married, no children | 39.28% | 32.72% | 42.46% |
| Single, w/children | 13.26% | 17.49% | 14.39% |
| Single, no children | 14.08% | 16.45% | 12.73% |
| Divorced | 10.41% | 14.40% | 10.62% |
| Separated | 6.18% | 5.52% | 4.97% |
| Widowed | 4.65% | 6.35% | 6.14% |
| Now Married | 39.39% | 41.34% | 46.32% |
| Never Married | 39.37% | 32.39% | 31.95% |
