| PEOPLE | Ann Arbor | Boulder | United States |
| Population | 113,934 | 97,385 | 308,035,306 |
| Pop. Density | 4,094 | 3,948 | 87 |
| Pop. Change | -1.40% | 2.41% | 8.07% |
| Median Age | 27.9 | 28.8 | 37.3 |
| Households | 47,060 | 41,302 | 116,716,292 |
| Household Size | 2.18 | 2.16 | 2.58 |
| Male Population | 49.29% | 51.35% | 49.27% |
| Female Population | 50.71% | 48.65% | 50.96% |
| Married Population | 34.62% | 29.68% | 47.02% |
| Single Population | 65.38% | 70.32% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 4.27% | 4.06% | 6.56% |
| Age 5 to 9 | 3.98% | 3.97% | 6.61% |
| Age 10 to 14 | 3.76% | 3.65% | 6.71% |
| Age 15 to 17 | 2.37% | 2.21% | 4.21% |
| Age 18 to 20 | 9.17% | 8.76% | 2.95% |
| Age 21 to 24 | 20.27% | 20.35% | 7.01% |
| Age 25 to 34 | 17.80% | 15.99% | 13.33% |
| Age 35 to 44 | 9.97% | 11.73% | 13.33% |
| Age 45 to 49 | 9.93% | 10.79% | 14.61% |
| Age 50 to 54 | 9.93% | 10.79% | 14.61% |
| Age 55 to 59 | 9.17% | 9.57% | 11.84% |
| Age 60 to 64 | 9.17% | 9.57% | 11.84% |
| Age 65 to 74 | 4.79% | 4.60% | 7.05% |
| Age 75 to 84 | 3.11% | 2.73% | 4.24% |
| Age 85 and over | 1.42% | 1.61% | 1.78% |
| RACE | | | |
| White | 73.00% | 88.00% | 72.41% |
| Black | 7.73% | 0.90% | 12.61% |
| Asian | 14.35% | 4.73% | 4.75% |
| American Indian | 0.26% | 0.44% | 0.95% |
| Other | 4.66% | 5.93% | 9.28% |
| Hispanic | 1.83% | 12.31% | 16.35% |
| Non-Hispanic | 98.17% | 87.69% | 83.65% |
| FAMILY | | | |
| Married, w/children | 33.16% | 34.21% | 30.42% |
| Married, no children | 45.46% | 45.48% | 42.46% |
| Single, w/children | 10.87% | 11.18% | 14.39% |
| Single, no children | 10.52% | 9.13% | 12.73% |
| Divorced | 7.17% | 10.00% | 10.62% |
| Separated | 2.81% | 4.73% | 4.97% |
| Widowed | 2.90% | 3.36% | 6.14% |
| Now Married | 34.16% | 29.69% | 46.32% |
| Never Married | 52.96% | 52.23% | 31.95% |
