| PEOPLE | Fairfax | United States |
| Population | 22,565 | 308,035,306 |
| Pop. Density | 3,617 | 87 |
| Pop. Change | 7.10% | 8.07% |
| Median Age | 38.9 | 37.3 |
| Households | 8,347 | 116,716,292 |
| Household Size | 2.64 | 2.58 |
| Male Population | 49.29% | 49.27% |
| Female Population | 50.71% | 50.96% |
| Married Population | 44.32% | 47.02% |
| Single Population | 55.68% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | |
| Age 0 to 4 | 5.67% | 6.56% |
| Age 5 to 9 | 5.55% | 6.61% |
| Age 10 to 14 | 5.73% | 6.71% |
| Age 15 to 17 | 3.39% | 4.21% |
| Age 18 to 20 | 2.02% | 2.95% |
| Age 21 to 24 | 8.02% | 7.01% |
| Age 25 to 34 | 14.47% | 13.33% |
| Age 35 to 44 | 13.78% | 13.33% |
| Age 45 to 49 | 15.24% | 14.61% |
| Age 50 to 54 | 15.24% | 14.61% |
| Age 55 to 59 | 12.43% | 11.84% |
| Age 60 to 64 | 12.43% | 11.84% |
| Age 65 to 74 | 7.16% | 7.05% |
| Age 75 to 84 | 4.48% | 4.24% |
| Age 85 and over | 2.04% | 1.78% |
| RACE | | |
| White | 69.60% | 72.41% |
| Black | 4.75% | 12.61% |
| Asian | 15.21% | 4.75% |
| American Indian | 0.49% | 0.95% |
| Other | 9.95% | 9.28% |
| Hispanic | 0.12% | 16.35% |
| Non-Hispanic | 99.88% | 83.65% |
| FAMILY | | |
| Married, w/children | 34.25% | 30.42% |
| Married, no children | 45.66% | 42.46% |
| Single, w/children | 8.28% | 14.39% |
| Single, no children | 11.81% | 12.73% |
| Divorced | 9.73% | 10.62% |
| Separated | 4.76% | 4.97% |
| Widowed | 7.31% | 6.14% |
| Now Married | 44.88% | 46.32% |
| Never Married | 33.32% | 31.95% |
