| | Pleasantville, NY | Head of the Harbor, NY | United States |
| Population | 7,469 | 1,533 | 329,725,481 |
| Female Population | 47.1% | 50.7% | 50.5% |
| Male Population | 52.9% | 49.3% | 49.5% |
| Median Age | 40.2 | 46 | 38.4 |
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| Population - 2010 | 7,110 | 1,482 | 309,327,143 |
| Population - 2000 | 7,172 | 1,447 | 285,036,114 |
| Population - 1990 | 6,592 | 1,354 | 251,960,433 |
| Pop. 2000 to Now | 0.8% | 0.4% | 15.6% |
| Pop. 1990 to Now | 9.6% | 7.2% | 30.8% |
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| Population Density | 4,088.1 | 546.1 | 93.4 |
| Land Area | 1.8 | 2.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Pleasantville, NY | Head of the Harbor, NY | United States |
| Age 0 to 4 | 4.5% | 2.9% | 5.9% |
| Age 5 to 9 | 5.7% | 4.9% | 6.1% |
| Age 10 to 14 | 6.5% | 7.6% | 6.6% |
| Age 15 to 17 | 8.0% | 5.1% | 3.9% |
| Age 18 to 20 | 3.5% | 2.9% | 4.0% |
| Age 21 to 24 | 4.8% | 6.7% | 5.2% |
| Age 25 to 34 | 9.8% | 10.1% | 13.8% |
| Age 35 to 44 | 13.0% | 7.8% | 12.9% |
| Age 45 to 54 | 17.4% | 17.5% | 12.6% |
| Age 55 to 59 | 8.6% | 9.7% | 6.7% |
| Age 60 to 64 | 4.7% | 7.9% | 6.3% |
| Age 65 to 74 | 9.1% | 9.7% | 9.6% |
| Age 75 to 84 | 3.1% | 5.2% | 4.5% |
| Age 85 and over | 1.1% | 1.9% | 1.9% |
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| Race | | | |
| | Pleasantville, NY | Head of the Harbor, NY | United States |
| White | 74.8% | 76.7% | 59.4% |
| Black | 4.0% | 3.7% | 12.2% |
| Asian | 3.9% | 4.5% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.6% | 0.0% | 0.4% |
| Two or More Races | 2.2% | 4.3% | 3.2% |
| Hispanic | 14.5% | 10.8% | 18.4% |
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| Marriage & Family | | | |
| | Pleasantville, NY | Head of the Harbor, NY | United States |
| Married Population | 49.3% | 55.5% | 49.8% |
| Currently Married | 46.9% | 55.4% | 48.0% |
| Married but Separated | 2.3% | 0.1% | 1.8% |
| Single Population | 50.7% | 44.5% | 50.2% |
| Never Married | 37.9% | 32.2% | 33.8% |
| Divorced | 9.9% | 6.1% | 10.8% |
| Widowed | 3.0% | 6.2% | 5.6% |
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| Household Size | 2.90 | 3.12 | 2.60 |
| Households | 2,447 | 492 | 124,010,992 |
| Family Households | 1,819 | 412 | 80,755,759 |
| Married couple, w/children | 43.0% | 40.0% | 30.5% |
| Married couple, no children | 36.1% | 45.1% | 42.9% |
| Non Family Households | 628 | 80 | 43,255,233 |
| Single householder, w/children | 7.8% | 8.7% | 15.8% |
| Single householder, no children | 13.1% | 6.1% | 10.8% |