| | Dobbs Ferry, NY | Seven Lakes, NC | United States |
| Population | 11,511 | 3,919 | 329,725,481 |
| Female Population | 49.2% | 56.2% | 50.5% |
| Male Population | 50.8% | 43.8% | 49.5% |
| Median Age | 39.1 | 65.7 | 38.4 |
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| Population - 2010 | 10,856 | 4,660 | 309,327,143 |
| Population - 2000 | 10,622 | 3,214 | 285,036,114 |
| Population - 1990 | 9,940 | 2,049 | 251,960,433 |
| Pop. 2000 to Now | 2.8% | 54.3% | 15.6% |
| Pop. 1990 to Now | 9.9% | 142.0% | 30.8% |
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| Population Density | 4,739.0 | 467.2 | 93.4 |
| Land Area | 2.4 | 8.4 | 3,531,905.4 |
| Water Area | 0.8 | 1.7 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Dobbs Ferry, NY | Seven Lakes, NC | United States |
| Age 0 to 4 | 5.5% | 0.0% | 5.9% |
| Age 5 to 9 | 5.6% | 0.9% | 6.1% |
| Age 10 to 14 | 8.5% | 3.1% | 6.6% |
| Age 15 to 17 | 5.6% | 6.4% | 3.9% |
| Age 18 to 20 | 6.1% | 4.2% | 4.0% |
| Age 21 to 24 | 4.3% | 1.5% | 5.2% |
| Age 25 to 34 | 9.7% | 2.8% | 13.8% |
| Age 35 to 44 | 13.0% | 1.8% | 12.9% |
| Age 45 to 54 | 12.9% | 9.1% | 12.6% |
| Age 55 to 59 | 5.8% | 8.5% | 6.7% |
| Age 60 to 64 | 6.1% | 6.7% | 6.3% |
| Age 65 to 74 | 9.9% | 26.2% | 9.6% |
| Age 75 to 84 | 4.3% | 27.4% | 4.5% |
| Age 85 and over | 2.7% | 1.5% | 1.9% |
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| Race | | | |
| | Dobbs Ferry, NY | Seven Lakes, NC | United States |
| White | 69.5% | 81.6% | 59.4% |
| Black | 3.8% | 6.7% | 12.2% |
| Asian | 9.6% | 1.5% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 4.5% | 10.1% | 3.2% |
| Hispanic | 12.7% | 0.0% | 18.4% |
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| Marriage & Family | | | |
| | Dobbs Ferry, NY | Seven Lakes, NC | United States |
| Married Population | 57.1% | 69.0% | 49.8% |
| Currently Married | 56.2% | 68.6% | 48.0% |
| Married but Separated | 0.9% | 0.3% | 1.8% |
| Single Population | 42.9% | 31.0% | 50.2% |
| Never Married | 33.1% | 15.4% | 33.8% |
| Divorced | 6.3% | 11.8% | 10.8% |
| Widowed | 3.5% | 3.8% | 5.6% |
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| Household Size | 2.73 | 2.14 | 2.60 |
| Households | 3,812 | 1,828 | 124,010,992 |
| Family Households | 2,955 | 1,423 | 80,755,759 |
| Married couple, w/children | 40.0% | 3.3% | 30.5% |
| Married couple, no children | 40.5% | 88.0% | 42.9% |
| Non Family Households | 857 | 405 | 43,255,233 |
| Single householder, w/children | 14.4% | 8.7% | 15.8% |
| Single householder, no children | 5.1% | 0.0% | 10.8% |