| | Alpine, NJ | Irvington, NY | United States |
| Population | 1,336 | 6,594 | 329,725,481 |
| Female Population | 49.0% | 51.6% | 50.5% |
| Male Population | 51.1% | 48.4% | 49.5% |
| Median Age | 48.7 | 38.3 | 38.4 |
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| Population - 2010 | 1,820 | 6,423 | 309,327,143 |
| Population - 2000 | 2,183 | 6,631 | 285,036,114 |
| Population - 1990 | 1,716 | 6,348 | 251,960,433 |
| Pop. 2000 to Now | -15.7% | -3.1% | 15.6% |
| Pop. 1990 to Now | 7.3% | 1.2% | 30.8% |
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| Population Density | 208.7 | 2,377.9 | 93.4 |
| Land Area | 6.4 | 2.8 | 3,531,905.4 |
| Water Area | 2.8 | 1.3 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Alpine, NJ | Irvington, NY | United States |
| Age 0 to 4 | 5.3% | 7.8% | 5.9% |
| Age 5 to 9 | 3.8% | 11.9% | 6.1% |
| Age 10 to 14 | 7.6% | 8.0% | 6.6% |
| Age 15 to 17 | 4.9% | 4.3% | 3.9% |
| Age 18 to 20 | 3.5% | 3.1% | 4.0% |
| Age 21 to 24 | 1.3% | 4.3% | 5.2% |
| Age 25 to 34 | 7.0% | 6.5% | 13.8% |
| Age 35 to 44 | 11.2% | 14.1% | 12.9% |
| Age 45 to 54 | 12.0% | 17.5% | 12.6% |
| Age 55 to 59 | 5.6% | 5.7% | 6.7% |
| Age 60 to 64 | 4.1% | 4.9% | 6.3% |
| Age 65 to 74 | 21.8% | 8.4% | 9.6% |
| Age 75 to 84 | 8.2% | 2.6% | 4.5% |
| Age 85 and over | 3.7% | 0.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Alpine, NJ | Irvington, NY | United States |
| White | 56.0% | 81.0% | 59.4% |
| Black | 0.0% | 0.8% | 12.2% |
| Asian | 35.9% | 9.2% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 0.3% | 0.0% | 0.4% |
| Two or More Races | 1.5% | 3.3% | 3.2% |
| Hispanic | 6.4% | 5.6% | 18.4% |
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| Marriage & Family | | | |
| | Alpine, NJ | Irvington, NY | United States |
| Married Population | 71.8% | 67.7% | 49.8% |
| Currently Married | 71.6% | 67.4% | 48.0% |
| Married but Separated | 0.2% | 0.3% | 1.8% |
| Single Population | 28.2% | 32.3% | 50.2% |
| Never Married | 21.4% | 25.5% | 33.8% |
| Divorced | 2.0% | 4.7% | 10.8% |
| Widowed | 4.9% | 2.1% | 5.6% |
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| Household Size | 2.75 | 3.10 | 2.60 |
| Households | 485 | 2,109 | 124,010,992 |
| Family Households | 407 | 1,784 | 80,755,759 |
| Married couple, w/children | 28.3% | 57.6% | 30.5% |
| Married couple, no children | 62.4% | 31.4% | 42.9% |
| Non Family Households | 78 | 325 | 43,255,233 |
| Single householder, w/children | 7.1% | 5.5% | 15.8% |
| Single householder, no children | 2.2% | 5.4% | 10.8% |