| PEOPLE | Manassas | San Francisco | United States |
| Population | 37,821 | 805,235 | 308,035,306 |
| Pop. Density | 3,828 | 17,179 | 87 |
| Pop. Change | 8.56% | 4.62% | 8.07% |
| Median Age | 32.2 | 38.5 | 37.3 |
| Households | 12,527 | 345,811 | 116,716,292 |
| Household Size | 3.02 | 2.26 | 2.58 |
| Male Population | 50.15% | 50.73% | 49.27% |
| Female Population | 49.85% | 49.27% | 50.96% |
| Married Population | 48.03% | 31.61% | 47.02% |
| Single Population | 51.97% | 68.39% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 8.45% | 4.37% | 6.56% |
| Age 5 to 9 | 7.78% | 3.53% | 6.61% |
| Age 10 to 14 | 7.53% | 3.27% | 6.71% |
| Age 15 to 17 | 4.66% | 2.18% | 4.21% |
| Age 18 to 20 | 2.65% | 2.12% | 2.95% |
| Age 21 to 24 | 6.95% | 7.53% | 7.01% |
| Age 25 to 34 | 16.51% | 20.88% | 13.33% |
| Age 35 to 44 | 14.54% | 16.60% | 13.33% |
| Age 45 to 49 | 14.40% | 13.89% | 14.61% |
| Age 50 to 54 | 14.40% | 13.89% | 14.61% |
| Age 55 to 59 | 9.65% | 12.00% | 11.84% |
| Age 60 to 64 | 9.65% | 12.00% | 11.84% |
| Age 65 to 74 | 4.06% | 6.75% | 7.05% |
| Age 75 to 84 | 1.97% | 4.72% | 4.24% |
| Age 85 and over | 0.86% | 2.17% | 1.78% |
| RACE | | | |
| White | 61.70% | 48.48% | 72.41% |
| Black | 13.72% | 6.07% | 12.61% |
| Asian | 4.98% | 33.27% | 4.75% |
| American Indian | 0.61% | 0.50% | 0.95% |
| Other | 18.99% | 11.68% | 9.28% |
| Hispanic | 0.35% | 3.74% | 16.35% |
| Non-Hispanic | 99.65% | 96.26% | 83.65% |
| FAMILY | | | |
| Married, w/children | 37.50% | 27.00% | 30.42% |
| Married, no children | 34.88% | 45.46% | 42.46% |
| Single, w/children | 15.74% | 9.56% | 14.39% |
| Single, no children | 11.87% | 17.98% | 12.73% |
| Divorced | 8.66% | 8.92% | 10.62% |
| Separated | 7.16% | 7.58% | 4.97% |
| Widowed | 4.44% | 6.12% | 6.14% |
| Now Married | 48.66% | 31.77% | 46.32% |
| Never Married | 31.08% | 45.62% | 31.95% |
