| | Hudson, NY | Central Islip, NY | United States |
| Population | 5,964 | 36,292 | 329,725,481 |
| Female Population | 48.1% | 48.8% | 50.5% |
| Male Population | 51.9% | 51.3% | 49.5% |
| Median Age | 39 | 34.7 | 38.4 |
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| Population - 2010 | 6,718 | 35,912 | 309,327,143 |
| Population - 2000 | 7,524 | 31,950 | 285,036,114 |
| Population - 1990 | 8,034 | 26,028 | 251,960,433 |
| Pop. 2000 to Now | -20.0% | 2.8% | 15.6% |
| Pop. 1990 to Now | -25.1% | 26.2% | 30.8% |
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| Population Density | 2,763.7 | 5,105.1 | 93.4 |
| Land Area | 2.2 | 7.1 | 3,531,905.4 |
| Water Area | 0.2 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Hudson, NY | Central Islip, NY | United States |
| Age 0 to 4 | 3.3% | 7.0% | 5.9% |
| Age 5 to 9 | 6.1% | 4.7% | 6.1% |
| Age 10 to 14 | 4.4% | 7.7% | 6.6% |
| Age 15 to 17 | 4.6% | 4.9% | 3.9% |
| Age 18 to 20 | 1.6% | 6.1% | 4.0% |
| Age 21 to 24 | 5.2% | 5.4% | 5.2% |
| Age 25 to 34 | 17.6% | 14.7% | 13.8% |
| Age 35 to 44 | 15.1% | 14.9% | 12.9% |
| Age 45 to 54 | 14.0% | 14.0% | 12.6% |
| Age 55 to 59 | 6.3% | 5.9% | 6.7% |
| Age 60 to 64 | 6.0% | 5.0% | 6.3% |
| Age 65 to 74 | 11.7% | 5.8% | 9.6% |
| Age 75 to 84 | 2.5% | 3.4% | 4.5% |
| Age 85 and over | 1.5% | 0.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Hudson, NY | Central Islip, NY | United States |
| White | 56.9% | 17.3% | 59.4% |
| Black | 20.8% | 20.9% | 12.2% |
| Asian | 10.9% | 2.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.7% | 0.4% |
| Two or More Races | 3.3% | 1.4% | 3.2% |
| Hispanic | 8.1% | 57.7% | 18.4% |
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| Marriage & Family | | | |
| | Hudson, NY | Central Islip, NY | United States |
| Married Population | 34.3% | 36.9% | 49.8% |
| Currently Married | 31.2% | 34.3% | 48.0% |
| Married but Separated | 3.1% | 2.6% | 1.8% |
| Single Population | 65.7% | 63.1% | 50.2% |
| Never Married | 50.3% | 47.7% | 33.8% |
| Divorced | 11.3% | 12.3% | 10.8% |
| Widowed | 4.1% | 3.2% | 5.6% |
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| Household Size | 2.14 | 3.87 | 2.60 |
| Households | 2,450 | 9,331 | 124,010,992 |
| Family Households | 1,254 | 6,638 | 80,755,759 |
| Married couple, w/children | 23.2% | 29.4% | 30.5% |
| Married couple, no children | 31.6% | 26.4% | 42.9% |
| Non Family Households | 1,196 | 2,693 | 43,255,233 |
| Single householder, w/children | 27.7% | 22.2% | 15.8% |
| Single householder, no children | 17.5% | 22.0% | 10.8% |