| PEOPLE | Arlington | Dix Hills | United States |
| Population | 207,627 | 26,892 | 308,035,306 |
| Pop. Density | 7,994 | 1,686 | 87 |
| Pop. Change | 11.31% | 2.94% | 8.07% |
| Median Age | 33.6 | 42.2 | 37.3 |
| Households | 98,050 | 8,319 | 116,716,292 |
| Household Size | 2.08 | 3.19 | 2.58 |
| Male Population | 49.85% | 49.73% | 49.27% |
| Female Population | 50.15% | 50.27% | 50.96% |
| Married Population | 35.82% | 61.57% | 47.02% |
| Single Population | 64.18% | 38.43% | 52.98% |
| ESTIMATED TOTAL POPULATION BY AGE | | | |
| Age 0 to 4 | 5.67% | 4.24% | 6.56% |
| Age 5 to 9 | 4.42% | 7.39% | 6.61% |
| Age 10 to 14 | 3.52% | 9.62% | 6.71% |
| Age 15 to 17 | 2.10% | 6.17% | 4.21% |
| Age 18 to 20 | 1.26% | 2.34% | 2.95% |
| Age 21 to 24 | 8.53% | 5.14% | 7.01% |
| Age 25 to 34 | 27.65% | 6.57% | 13.33% |
| Age 35 to 44 | 15.83% | 13.17% | 13.33% |
| Age 45 to 49 | 12.39% | 18.70% | 14.61% |
| Age 50 to 54 | 12.39% | 18.70% | 14.61% |
| Age 55 to 59 | 9.94% | 12.89% | 11.84% |
| Age 60 to 64 | 9.94% | 12.89% | 11.84% |
| Age 65 to 74 | 4.86% | 8.32% | 7.05% |
| Age 75 to 84 | 2.48% | 4.28% | 4.24% |
| Age 85 and over | 1.36% | 1.16% | 1.78% |
| RACE | | | |
| White | 71.75% | 79.87% | 72.41% |
| Black | 8.49% | 5.50% | 12.61% |
| Asian | 9.60% | 11.19% | 4.75% |
| American Indian | 0.47% | 0.10% | 0.95% |
| Other | 9.69% | 3.33% | 9.28% |
| Hispanic | 1.24% | 1.06% | 16.35% |
| Non-Hispanic | 98.76% | 98.94% | 83.65% |
| FAMILY | | | |
| Married, w/children | 34.20% | 43.56% | 30.42% |
| Married, no children | 45.64% | 44.52% | 42.46% |
| Single, w/children | 8.71% | 4.80% | 14.39% |
| Single, no children | 11.45% | 7.12% | 12.73% |
| Divorced | 9.14% | 4.15% | 10.62% |
| Separated | 7.72% | 2.71% | 4.97% |
| Widowed | 3.89% | 4.17% | 6.14% |
| Now Married | 36.50% | 62.65% | 46.32% |
| Never Married | 42.75% | 26.31% | 31.95% |
