| | Hastings-on-Hudson, NY | Dobbs Ferry, NY | United States |
| Population | 8,505 | 11,511 | 329,725,481 |
| Female Population | 51.8% | 49.2% | 50.5% |
| Male Population | 48.2% | 50.8% | 49.5% |
| Median Age | 44 | 39.1 | 38.4 |
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| Population - 2010 | 7,941 | 10,856 | 309,327,143 |
| Population - 2000 | 7,648 | 10,622 | 285,036,114 |
| Population - 1990 | 8,000 | 9,940 | 251,960,433 |
| Pop. 2000 to Now | 3.0% | 2.8% | 15.6% |
| Pop. 1990 to Now | -1.5% | 9.9% | 30.8% |
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| Population Density | 4,357.1 | 4,739.0 | 93.4 |
| Land Area | 2.0 | 2.4 | 3,531,905.4 |
| Water Area | 1.0 | 0.8 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Hastings-on-Hudson, NY | Dobbs Ferry, NY | United States |
| Age 0 to 4 | 5.0% | 5.5% | 5.9% |
| Age 5 to 9 | 6.9% | 5.6% | 6.1% |
| Age 10 to 14 | 8.4% | 8.5% | 6.6% |
| Age 15 to 17 | 3.6% | 5.6% | 3.9% |
| Age 18 to 20 | 1.5% | 6.1% | 4.0% |
| Age 21 to 24 | 4.6% | 4.3% | 5.2% |
| Age 25 to 34 | 9.5% | 9.7% | 13.8% |
| Age 35 to 44 | 12.6% | 13.0% | 12.9% |
| Age 45 to 54 | 12.1% | 12.9% | 12.6% |
| Age 55 to 59 | 6.2% | 5.8% | 6.7% |
| Age 60 to 64 | 8.5% | 6.1% | 6.3% |
| Age 65 to 74 | 10.5% | 9.9% | 9.6% |
| Age 75 to 84 | 6.7% | 4.3% | 4.5% |
| Age 85 and over | 3.9% | 2.7% | 1.9% |
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| Race | | | |
| | Hastings-on-Hudson, NY | Dobbs Ferry, NY | United States |
| White | 80.9% | 69.5% | 59.4% |
| Black | 1.2% | 3.8% | 12.2% |
| Asian | 5.0% | 9.6% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.7% | 0.0% | 0.4% |
| Two or More Races | 3.2% | 4.5% | 3.2% |
| Hispanic | 9.0% | 12.7% | 18.4% |
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| Marriage & Family | | | |
| | Hastings-on-Hudson, NY | Dobbs Ferry, NY | United States |
| Married Population | 61.7% | 57.1% | 49.8% |
| Currently Married | 61.5% | 56.2% | 48.0% |
| Married but Separated | 0.2% | 0.9% | 1.8% |
| Single Population | 38.3% | 42.9% | 50.2% |
| Never Married | 28.6% | 33.1% | 33.8% |
| Divorced | 4.9% | 6.3% | 10.8% |
| Widowed | 4.8% | 3.5% | 5.6% |
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| Household Size | 2.62 | 2.73 | 2.60 |
| Households | 3,065 | 3,812 | 124,010,992 |
| Family Households | 2,243 | 2,955 | 80,755,759 |
| Married couple, w/children | 40.0% | 40.0% | 30.5% |
| Married couple, no children | 50.3% | 40.5% | 42.9% |
| Non Family Households | 822 | 857 | 43,255,233 |
| Single householder, w/children | 5.0% | 14.4% | 15.8% |
| Single householder, no children | 4.7% | 5.1% | 10.8% |