| PEOPLE | Pittsburgh | Belfast | United States |
| Population | 305,704 | 6,668 | 308,035,306 |
| Pop. Density | 5,521 | 196 | 87 |
| Pop. Change | -8.82% | 4.59% | 8.07% |
| Median Age | 33.5 | 46.9 | 37.3 |
| Households | 136,217 | 3,049 | 116,716,292 |
| Household Size | 2.07 | 2.14 | 2.58 |
| Male Population | 48.45% | 46.18% | 49.27% |
| Female Population | 51.55% | 53.82% | 50.96% |
| Married Population | 30.32% | 45.33% | 47.02% |
| Single Population | 69.68% | 54.67% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 4.94% | 5.55% | 6.56% |
| Age 5 to 9 | 4.26% | 5.80% | 6.61% |
| Age 10 to 14 | 4.20% | 5.32% | 6.71% |
| Age 15 to 17 | 2.88% | 3.25% | 4.21% |
| Age 18 to 20 | 5.08% | 1.77% | 2.95% |
| Age 21 to 24 | 13.81% | 4.39% | 7.01% |
| Age 25 to 34 | 16.92% | 10.62% | 13.33% |
| Age 35 to 44 | 10.46% | 10.80% | 13.33% |
| Age 45 to 49 | 12.40% | 14.07% | 14.61% |
| Age 50 to 54 | 12.40% | 14.07% | 14.61% |
| Age 55 to 59 | 11.25% | 16.50% | 11.84% |
| Age 60 to 64 | 11.25% | 16.50% | 11.84% |
| Age 65 to 74 | 6.44% | 10.51% | 7.05% |
| Age 75 to 84 | 4.94% | 6.99% | 4.24% |
| Age 85 and over | 2.40% | 4.42% | 1.78% |
| RACE | | | |
| White | 66.00% | 96.72% | 72.41% |
| Black | 26.07% | 0.48% | 12.61% |
| Asian | 4.40% | 0.39% | 4.75% |
| American Indian | 0.19% | 0.45% | 0.95% |
| Other | 3.33% | 1.96% | 9.28% |
| Hispanic | 6.35% | 2.83% | 16.35% |
| Non-Hispanic | 93.65% | 97.17% | 83.65% |
| FAMILY | | | |
| Married, w/children | 18.82% | 22.04% | 30.42% |
| Married, no children | 39.54% | 50.90% | 42.46% |
| Single, w/children | 20.38% | 15.85% | 14.39% |
| Single, no children | 21.26% | 11.22% | 12.73% |
| Divorced | 9.89% | 15.00% | 10.62% |
| Separated | 5.53% | 2.40% | 4.97% |
| Widowed | 8.63% | 11.03% | 6.14% |
| Now Married | 30.32% | 46.22% | 46.32% |
| Never Married | 45.63% | 25.35% | 31.95% |
