| PEOPLE | Boston | North Chicago | United States |
| Population | 617,594 | 32,574 | 308,035,306 |
| Pop. Density | 12,793 | 4,124 | 87 |
| Pop. Change | 5.09% | -17.40% | 8.07% |
| Median Age | 31 | 23 | 37.3 |
| Households | 252,699 | 6,620 | 116,716,292 |
| Household Size | 2.26 | 3.01 | 2.58 |
| Male Population | 47.92% | 60.47% | 49.27% |
| Female Population | 52.08% | 39.53% | 50.96% |
| Married Population | 24.61% | 24.62% | 47.02% |
| Single Population | 75.39% | 75.38% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 5.25% | 6.72% | 6.56% |
| Age 5 to 9 | 4.34% | 5.81% | 6.61% |
| Age 10 to 14 | 4.29% | 4.90% | 6.71% |
| Age 15 to 17 | 2.91% | 2.73% | 4.21% |
| Age 18 to 20 | 5.16% | 13.68% | 2.95% |
| Age 21 to 24 | 14.27% | 24.68% | 7.01% |
| Age 25 to 34 | 20.74% | 18.08% | 13.33% |
| Age 35 to 44 | 12.52% | 7.88% | 13.33% |
| Age 45 to 49 | 11.36% | 6.46% | 14.61% |
| Age 50 to 54 | 11.36% | 6.46% | 14.61% |
| Age 55 to 59 | 9.08% | 4.74% | 11.84% |
| Age 60 to 64 | 9.08% | 4.74% | 11.84% |
| Age 65 to 74 | 5.33% | 2.42% | 7.05% |
| Age 75 to 84 | 3.28% | 1.47% | 4.24% |
| Age 85 and over | 1.47% | 0.44% | 1.78% |
| RACE | | | |
| White | 53.92% | 47.89% | 72.41% |
| Black | 24.36% | 29.92% | 12.61% |
| Asian | 8.94% | 3.76% | 4.75% |
| American Indian | 0.39% | 0.71% | 0.95% |
| Other | 12.39% | 17.72% | 9.28% |
| Hispanic | 1.67% | 0.91% | 16.35% |
| Non-Hispanic | 98.33% | 99.09% | 83.65% |
| FAMILY | | | |
| Married, w/children | 21.77% | 36.25% | 30.42% |
| Married, no children | 33.72% | 23.17% | 42.46% |
| Single, w/children | 22.59% | 23.40% | 14.39% |
| Single, no children | 21.93% | 17.19% | 12.73% |
| Divorced | 7.80% | 7.06% | 10.62% |
| Separated | 8.40% | 10.84% | 4.97% |
| Widowed | 4.95% | 3.30% | 6.14% |
| Now Married | 24.50% | 24.45% | 46.32% |
| Never Married | 54.36% | 54.35% | 31.95% |
