| PEOPLE | Seattle | Harrisburg | United States |
| Population | 608,660 | 49,528 | 308,035,306 |
| Pop. Density | 7,251 | 6,092 | 87 |
| Pop. Change | 9.49% | 1.59% | 8.07% |
| Median Age | 36.2 | 32.5 | 37.3 |
| Households | 283,510 | 20,605 | 116,716,292 |
| Household Size | 2.06 | 2.36 | 2.58 |
| Male Population | 49.95% | 48.11% | 49.27% |
| Female Population | 50.05% | 51.89% | 50.96% |
| Married Population | 34.51% | 22.60% | 47.02% |
| Single Population | 65.49% | 77.40% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 5.26% | 8.87% | 6.56% |
| Age 5 to 9 | 4.26% | 7.13% | 6.61% |
| Age 10 to 14 | 3.63% | 6.48% | 6.71% |
| Age 15 to 17 | 2.21% | 4.32% | 4.21% |
| Age 18 to 20 | 2.82% | 2.94% | 2.95% |
| Age 21 to 24 | 9.02% | 8.05% | 7.01% |
| Age 25 to 34 | 20.80% | 15.71% | 13.33% |
| Age 35 to 44 | 16.38% | 12.55% | 13.33% |
| Age 45 to 49 | 13.23% | 13.73% | 14.61% |
| Age 50 to 54 | 13.23% | 13.73% | 14.61% |
| Age 55 to 59 | 11.63% | 11.15% | 11.84% |
| Age 60 to 64 | 11.63% | 11.15% | 11.84% |
| Age 65 to 74 | 5.43% | 5.14% | 7.05% |
| Age 75 to 84 | 3.30% | 2.75% | 4.24% |
| Age 85 and over | 2.03% | 1.17% | 1.78% |
| RACE | | | |
| White | 69.48% | 30.65% | 72.41% |
| Black | 7.94% | 52.41% | 12.61% |
| Asian | 13.84% | 3.45% | 4.75% |
| American Indian | 0.79% | 0.51% | 0.95% |
| Other | 7.96% | 12.98% | 9.28% |
| Hispanic | 0.00% | 9.25% | 16.35% |
| Non-Hispanic | 100.00% | 90.75% | 83.65% |
| FAMILY | | | |
| Married, w/children | 30.43% | 14.87% | 30.42% |
| Married, no children | 45.60% | 24.71% | 42.46% |
| Single, w/children | 11.67% | 36.74% | 14.39% |
| Single, no children | 12.30% | 23.68% | 12.73% |
| Divorced | 12.30% | 14.18% | 10.62% |
| Separated | 5.21% | 7.18% | 4.97% |
| Widowed | 5.12% | 6.76% | 6.14% |
| Now Married | 34.43% | 22.75% | 46.32% |
| Never Married | 42.94% | 49.13% | 31.95% |
