| PEOPLE | Mill Creek | Bellingham | United States |
| Population | 18,244 | 80,885 | 308,035,306 |
| Pop. Density | 3,906 | 2,987 | 87 |
| Pop. Change | 29.64% | 18.19% | 8.07% |
| Median Age | 38.8 | 31.5 | 37.3 |
| Households | 7,551 | 34,671 | 116,716,292 |
| Household Size | 2.44 | 2.2 | 2.58 |
| Male Population | 48.63% | 48.81% | 49.27% |
| Female Population | 51.37% | 51.19% | 50.96% |
| Married Population | 58.43% | 33.84% | 47.02% |
| Single Population | 41.57% | 66.16% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 5.71% | 4.62% | 6.56% |
| Age 5 to 9 | 6.71% | 4.30% | 6.61% |
| Age 10 to 14 | 6.80% | 4.13% | 6.71% |
| Age 15 to 17 | 4.12% | 2.52% | 4.21% |
| Age 18 to 20 | 2.08% | 6.35% | 2.95% |
| Age 21 to 24 | 6.21% | 17.23% | 7.01% |
| Age 25 to 34 | 13.37% | 15.32% | 13.33% |
| Age 35 to 44 | 14.02% | 10.66% | 13.33% |
| Age 45 to 49 | 15.63% | 10.84% | 14.61% |
| Age 50 to 54 | 15.63% | 10.84% | 14.61% |
| Age 55 to 59 | 12.82% | 11.20% | 11.84% |
| Age 60 to 64 | 12.82% | 11.20% | 11.84% |
| Age 65 to 74 | 6.67% | 6.10% | 7.05% |
| Age 75 to 84 | 3.80% | 4.21% | 4.24% |
| Age 85 and over | 2.07% | 2.53% | 1.78% |
| RACE | | | |
| White | 74.20% | 84.88% | 72.41% |
| Black | 2.17% | 1.32% | 12.61% |
| Asian | 16.70% | 5.11% | 4.75% |
| American Indian | 0.50% | 1.35% | 0.95% |
| Other | 6.43% | 7.35% | 9.28% |
| Hispanic | 8.50% | 2.04% | 16.35% |
| Non-Hispanic | 91.50% | 97.96% | 83.65% |
| FAMILY | | | |
| Married, w/children | 35.40% | 26.65% | 30.42% |
| Married, no children | 47.00% | 46.77% | 42.46% |
| Single, w/children | 11.05% | 15.52% | 14.39% |
| Single, no children | 6.54% | 11.06% | 12.73% |
| Divorced | 7.70% | 11.20% | 10.62% |
| Separated | 3.42% | 4.51% | 4.97% |
| Widowed | 4.89% | 5.16% | 6.14% |
| Now Married | 59.21% | 34.12% | 46.32% |
| Never Married | 24.77% | 45.01% | 31.95% |
