| PEOPLE | Sammamish | Anderson | United States |
| Population | 45,780 | 56,129 | 308,035,306 |
| Pop. Density | 2,512 | 1,357 | 87 |
| Pop. Change | 35.26% | -6.38% | 8.07% |
| Median Age | 37.5 | 37.7 | 37.3 |
| Households | 15,154 | 23,560 | 116,716,292 |
| Household Size | 2.97 | 2.29 | 2.58 |
| Male Population | 50.07% | 47.88% | 49.27% |
| Female Population | 49.93% | 52.12% | 50.96% |
| Married Population | 72.59% | 37.93% | 47.02% |
| Single Population | 27.41% | 62.07% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 6.96% | 6.73% | 6.56% |
| Age 5 to 9 | 9.91% | 6.04% | 6.61% |
| Age 10 to 14 | 9.81% | 5.95% | 6.71% |
| Age 15 to 17 | 5.56% | 3.68% | 4.21% |
| Age 18 to 20 | 1.94% | 3.47% | 2.95% |
| Age 21 to 24 | 2.90% | 8.11% | 7.01% |
| Age 25 to 34 | 8.40% | 12.70% | 13.33% |
| Age 35 to 44 | 19.46% | 12.14% | 13.33% |
| Age 45 to 49 | 18.50% | 13.30% | 14.61% |
| Age 50 to 54 | 18.50% | 13.30% | 14.61% |
| Age 55 to 59 | 10.85% | 11.59% | 11.84% |
| Age 60 to 64 | 10.85% | 11.59% | 11.84% |
| Age 65 to 74 | 3.80% | 7.94% | 7.05% |
| Age 75 to 84 | 1.41% | 5.63% | 4.24% |
| Age 85 and over | 0.50% | 2.73% | 1.78% |
| RACE | | | |
| White | 74.72% | 78.75% | 72.41% |
| Black | 0.96% | 15.20% | 12.61% |
| Asian | 19.34% | 0.47% | 4.75% |
| American Indian | 0.28% | 0.33% | 0.95% |
| Other | 4.71% | 5.24% | 9.28% |
| Hispanic | 21.09% | 1.21% | 16.35% |
| Non-Hispanic | 78.91% | 98.79% | 83.65% |
| FAMILY | | | |
| Married, w/children | 54.65% | 20.10% | 30.42% |
| Married, no children | 35.52% | 41.18% | 42.46% |
| Single, w/children | 6.22% | 21.76% | 14.39% |
| Single, no children | 3.61% | 16.96% | 12.73% |
| Divorced | 5.43% | 18.05% | 10.62% |
| Separated | 1.88% | 4.07% | 4.97% |
| Widowed | 1.85% | 9.14% | 6.14% |
| Now Married | 72.28% | 37.29% | 46.32% |
| Never Married | 18.56% | 31.44% | 31.95% |
