| PEOPLE | Boulder | Aurora | United States |
| Population | 97,385 | 325,078 | 308,035,306 |
| Pop. Density | 3,948 | 2,101 | 87 |
| Pop. Change | 2.41% | 19.51% | 8.07% |
| Median Age | 28.8 | 33.2 | 37.3 |
| Households | 41,302 | 121,901 | 116,716,292 |
| Household Size | 2.16 | 2.66 | 2.58 |
| Male Population | 51.35% | 49.25% | 49.27% |
| Female Population | 48.65% | 50.75% | 50.96% |
| Married Population | 29.68% | 44.54% | 47.02% |
| Single Population | 70.32% | 55.46% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 4.06% | 8.36% | 6.56% |
| Age 5 to 9 | 3.97% | 7.77% | 6.61% |
| Age 10 to 14 | 3.65% | 7.03% | 6.71% |
| Age 15 to 17 | 2.21% | 4.17% | 4.21% |
| Age 18 to 20 | 8.76% | 2.46% | 2.95% |
| Age 21 to 24 | 20.35% | 6.82% | 7.01% |
| Age 25 to 34 | 15.99% | 16.21% | 13.33% |
| Age 35 to 44 | 11.73% | 14.53% | 13.33% |
| Age 45 to 49 | 10.79% | 13.35% | 14.61% |
| Age 50 to 54 | 10.79% | 13.35% | 14.61% |
| Age 55 to 59 | 9.57% | 10.36% | 11.84% |
| Age 60 to 64 | 9.57% | 10.36% | 11.84% |
| Age 65 to 74 | 4.60% | 5.13% | 7.05% |
| Age 75 to 84 | 2.73% | 2.71% | 4.24% |
| Age 85 and over | 1.61% | 1.10% | 1.78% |
| RACE | | | |
| White | 88.00% | 61.13% | 72.41% |
| Black | 0.90% | 15.75% | 12.61% |
| Asian | 4.73% | 4.95% | 4.75% |
| American Indian | 0.44% | 0.95% | 0.95% |
| Other | 5.93% | 17.22% | 9.28% |
| Hispanic | 12.31% | 5.17% | 16.35% |
| Non-Hispanic | 87.69% | 94.83% | 83.65% |
| FAMILY | | | |
| Married, w/children | 34.21% | 33.23% | 30.42% |
| Married, no children | 45.48% | 35.65% | 42.46% |
| Single, w/children | 11.18% | 18.18% | 14.39% |
| Single, no children | 9.13% | 12.95% | 12.73% |
| Divorced | 10.00% | 13.36% | 10.62% |
| Separated | 4.73% | 5.93% | 4.97% |
| Widowed | 3.36% | 4.79% | 6.14% |
| Now Married | 29.69% | 44.54% | 46.32% |
| Never Married | 52.23% | 31.38% | 31.95% |
