| | Sayville, NY | Calabasas, CA | United States |
| Population | 16,311 | 24,319 | 321,418,820 |
| Population - 2010 | 16,107 | 22,686 | 308,745,538 |
| Population - 2000 | 16,735 | 20,033 | 285,036,114 |
| Population - 1990 | 16,550 | 15,403 | 251,960,433 |
| Pop. 1990 to Now | -1.44% | 57.89% | 27.57% |
| Pop. 2000 to Now | -2.53% | 21.40% | 12.76% |
| Pop. Density | 3,074 | 1,774 | 91 |
| Land Area | 5 | 14 | 3,531,905 |
| Water Area | 0 | 0 | 264,837 |
| Median Age | 44.3 | 42.9 | 37.4 |
| Female Population | 53.69% | 53.90% | 50.81% |
| Male Population | 46.31% | 46.10% | 49.19% |
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| EST. TOTAL POPULATION BY AGE | | | |
| | Sayville, NY | Calabasas, CA | United States |
| Age 0 to 4 | 4.72% | 3.50% | 6.36% |
| Age 5 to 9 | 6.98% | 7.47% | 6.51% |
| Age 10 to 14 | 7.64% | 8.79% | 6.59% |
| Age 15 to 17 | 4.22% | 5.46% | 4.03% |
| Age 18 to 20 | 2.84% | 3.06% | 4.35% |
| Age 21 to 24 | 3.48% | 4.22% | 5.61% |
| Age 25 to 34 | 7.88% | 7.90% | 13.47% |
| Age 35 to 44 | 13.32% | 13.20% | 12.97% |
| Age 45 to 54 | 18.42% | 17.93% | 14.09% |
| Age 55 to 59 | 7.58% | 9.44% | 6.57% |
| Age 60 to 64 | 5.56% | 5.36% | 5.72% |
| Age 65 to 74 | 7.44% | 8.45% | 7.64% |
| Age 75 to 84 | 6.33% | 4.35% | 4.26% |
| Age 85 and over | 3.59% | 0.90% | 1.85% |
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| RACE | | | |
| | Sayville, NY | Calabasas, CA | United States |
| White | 92.25% | 76.60% | 62.77% |
| Black | 0.46% | 2.17% | 12.24% |
| Asian | 1.06% | 8.85% | 4.95% |
| Native American | 0.09% | 0.14% | 0.66% |
| Hawaiian, Pacific Islander | 0.23% | 0.04% | 0.16% |
| Other | 0.00% | 0.03% | 0.20% |
| Two or More Races | 0.69% | 5.52% | 2.13% |
| Hispanic | 5.23% | 6.64% | 16.90% |
| Non-Hispanic | 94.77% | 93.36% | 83.10% |
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| FAMILY | | | |
| | Sayville, NY | Calabasas, CA | United States |
| Households | 5,759 | 8,792 | 116,211,000 |
| Family Households | 4,171 | 6,690 | 76,958,100 |
| Non Family Households | 1,588 | 2,102 | 39,253,000 |
| Household Size | 2.73 | 2.72 | 2.63 |
| Married Population | 57.07% | 58.73% | 50.58% |
| Single Population | 42.93% | 41.27% | 49.42% |
| Now Married | 55.54% | 56.52% | 48.41% |
| Married but Separated | 1.53% | 2.21% | 2.17% |
| Never Married | 26.33% | 27.80% | 32.55% |
| Widowed | 9.84% | 4.26% | 5.95% |
| Divorced | 6.76% | 9.21% | 10.92% |
| Married, w/children | 40.83% | 37.38% | 31.68% |
| Married, no children | 42.68% | 40.96% | 41.44% |
| Single, w/children | 8.68% | 14.28% | 16.94% |
| Single, no children | 7.82% | 7.38% | 9.95% |