| PEOPLE | Cambridge | Boston | United States |
| Population | 105,162 | 617,594 | 308,035,306 |
| Pop. Density | 16,469 | 12,793 | 87 |
| Pop. Change | 4.21% | 5.09% | 8.07% |
| Median Age | 30.3 | 31 | 37.3 |
| Households | 44,032 | 252,699 | 116,716,292 |
| Household Size | 2 | 2.26 | 2.58 |
| Male Population | 48.60% | 47.92% | 49.27% |
| Female Population | 51.40% | 52.08% | 50.96% |
| Married Population | 27.71% | 24.61% | 47.02% |
| Single Population | 72.29% | 75.39% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 4.30% | 5.25% | 6.56% |
| Age 5 to 9 | 2.92% | 4.34% | 6.61% |
| Age 10 to 14 | 2.59% | 4.29% | 6.71% |
| Age 15 to 17 | 1.62% | 2.91% | 4.21% |
| Age 18 to 20 | 5.02% | 5.16% | 2.95% |
| Age 21 to 24 | 15.76% | 14.27% | 7.01% |
| Age 25 to 34 | 28.69% | 20.74% | 13.33% |
| Age 35 to 44 | 11.93% | 12.52% | 13.33% |
| Age 45 to 49 | 8.88% | 11.36% | 14.61% |
| Age 50 to 54 | 8.88% | 11.36% | 14.61% |
| Age 55 to 59 | 8.79% | 9.08% | 11.84% |
| Age 60 to 64 | 8.79% | 9.08% | 11.84% |
| Age 65 to 74 | 5.23% | 5.33% | 7.05% |
| Age 75 to 84 | 2.94% | 3.28% | 4.24% |
| Age 85 and over | 1.34% | 1.47% | 1.78% |
| RACE | | | |
| White | 66.57% | 53.92% | 72.41% |
| Black | 11.65% | 24.36% | 12.61% |
| Asian | 15.10% | 8.94% | 4.75% |
| American Indian | 0.23% | 0.39% | 0.95% |
| Other | 6.45% | 12.39% | 9.28% |
| Hispanic | 0.69% | 1.67% | 16.35% |
| Non-Hispanic | 99.31% | 98.33% | 83.65% |
| FAMILY | | | |
| Married, w/children | 26.84% | 21.77% | 30.42% |
| Married, no children | 46.19% | 33.72% | 42.46% |
| Single, w/children | 13.18% | 22.59% | 14.39% |
| Single, no children | 13.79% | 21.93% | 12.73% |
| Divorced | 8.06% | 7.80% | 10.62% |
| Separated | 6.04% | 8.40% | 4.97% |
| Widowed | 3.45% | 4.95% | 6.14% |
| Now Married | 27.49% | 24.50% | 46.32% |
| Never Married | 54.96% | 54.36% | 31.95% |
