| PEOPLE | Chantilly | United States |
| Population | 23,039 | 308,035,306 |
| Pop. Density | 1,917 | 87 |
| Pop. Change | 23.48% | 8.07% |
| Median Age | 36.1 | 37.3 |
| Households | 7,218 | 116,716,292 |
| Household Size | 3.18 | 2.58 |
| Male Population | 50.06% | 49.27% |
| Female Population | 49.94% | 50.96% |
| Married Population | 54.73% | 47.02% |
| Single Population | 45.27% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | |
| Age 0 to 4 | 6.90% | 6.56% |
| Age 5 to 9 | 7.36% | 6.61% |
| Age 10 to 14 | 8.22% | 6.71% |
| Age 15 to 17 | 5.34% | 4.21% |
| Age 18 to 20 | 2.26% | 2.95% |
| Age 21 to 24 | 5.53% | 7.01% |
| Age 25 to 34 | 12.84% | 13.33% |
| Age 35 to 44 | 15.66% | 13.33% |
| Age 45 to 49 | 17.71% | 14.61% |
| Age 50 to 54 | 17.71% | 14.61% |
| Age 55 to 59 | 11.64% | 11.84% |
| Age 60 to 64 | 11.64% | 11.84% |
| Age 65 to 74 | 4.47% | 7.05% |
| Age 75 to 84 | 1.66% | 4.24% |
| Age 85 and over | 0.43% | 1.78% |
| RACE | | |
| White | 57.56% | 72.41% |
| Black | 6.54% | 12.61% |
| Asian | 25.24% | 4.75% |
| American Indian | 0.25% | 0.95% |
| Other | 10.42% | 9.28% |
| Hispanic | 2.03% | 16.35% |
| Non-Hispanic | 97.97% | 83.65% |
| FAMILY | | |
| Married, w/children | 44.81% | 30.42% |
| Married, no children | 36.61% | 42.46% |
| Single, w/children | 9.14% | 14.39% |
| Single, no children | 9.45% | 12.73% |
| Divorced | 8.49% | 10.62% |
| Separated | 4.81% | 4.97% |
| Widowed | 2.61% | 6.14% |
| Now Married | 54.84% | 46.32% |
| Never Married | 29.26% | 31.95% |
