| PEOPLE | Washington | Walnut Creek | United States |
| Population | 601,723 | 64,173 | 308,035,306 |
| Pop. Density | 9,856 | 3,248 | 87 |
| Pop. Change | 6.86% | 0.54% | 8.07% |
| Median Age | 33.9 | 47.9 | 37.3 |
| Households | 266,707 | 30,443 | 116,716,292 |
| Household Size | 2.1 | 2.1 | 2.58 |
| Male Population | 47.23% | 46.34% | 49.27% |
| Female Population | 52.77% | 53.66% | 50.96% |
| Married Population | 22.71% | 48.04% | 47.02% |
| Single Population | 77.29% | 51.96% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 5.42% | 4.10% | 6.56% |
| Age 5 to 9 | 4.35% | 4.57% | 6.61% |
| Age 10 to 14 | 4.16% | 4.86% | 6.71% |
| Age 15 to 17 | 2.83% | 3.17% | 4.21% |
| Age 18 to 20 | 3.81% | 1.48% | 2.95% |
| Age 21 to 24 | 10.65% | 4.13% | 7.01% |
| Age 25 to 34 | 20.73% | 11.82% | 13.33% |
| Age 35 to 44 | 13.40% | 11.77% | 13.33% |
| Age 45 to 49 | 12.58% | 14.08% | 14.61% |
| Age 50 to 54 | 12.58% | 14.08% | 14.61% |
| Age 55 to 59 | 10.63% | 13.43% | 11.84% |
| Age 60 to 64 | 10.63% | 13.43% | 11.84% |
| Age 65 to 74 | 6.14% | 10.47% | 7.05% |
| Age 75 to 84 | 3.58% | 9.51% | 4.24% |
| Age 85 and over | 1.71% | 6.62% | 1.78% |
| RACE | | | |
| White | 38.47% | 78.67% | 72.41% |
| Black | 50.71% | 1.61% | 12.61% |
| Asian | 3.50% | 12.51% | 4.75% |
| American Indian | 0.35% | 0.24% | 0.95% |
| Other | 6.98% | 6.96% | 9.28% |
| Hispanic | 4.31% | 91.57% | 16.35% |
| Non-Hispanic | 95.69% | 8.43% | 83.65% |
| FAMILY | | | |
| Married, w/children | 18.76% | 29.48% | 30.42% |
| Married, no children | 33.28% | 52.55% | 42.46% |
| Single, w/children | 21.98% | 7.97% | 14.39% |
| Single, no children | 25.97% | 10.01% | 12.73% |
| Divorced | 9.83% | 10.42% | 10.62% |
| Separated | 6.35% | 4.09% | 4.97% |
| Widowed | 6.02% | 10.08% | 6.14% |
| Now Married | 22.58% | 47.81% | 46.32% |
| Never Married | 55.21% | 27.59% | 31.95% |
