| | Irvington, NY | Upper Nyack, NY | United States |
| Population | 6,594 | 2,355 | 329,725,481 |
| Female Population | 51.6% | 52.2% | 50.5% |
| Male Population | 48.4% | 47.8% | 49.5% |
| Median Age | 38.3 | 47.6 | 38.4 |
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| Population - 2010 | 6,423 | 2,069 | 309,327,143 |
| Population - 2000 | 6,631 | 1,863 | 285,036,114 |
| Population - 1990 | 6,348 | 2,084 | 251,960,433 |
| Pop. 2000 to Now | -3.1% | 16.9% | 15.6% |
| Pop. 1990 to Now | 1.2% | 4.5% | 30.8% |
| space4 | | | |
| Population Density | 2,377.9 | 1,927.2 | 93.4 |
| Land Area | 2.8 | 1.2 | 3,531,905.4 |
| Water Area | 1.3 | 3.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Irvington, NY | Upper Nyack, NY | United States |
| Age 0 to 4 | 7.8% | 3.7% | 5.9% |
| Age 5 to 9 | 11.9% | 5.3% | 6.1% |
| Age 10 to 14 | 8.0% | 6.2% | 6.6% |
| Age 15 to 17 | 4.3% | 10.2% | 3.9% |
| Age 18 to 20 | 3.1% | 5.7% | 4.0% |
| Age 21 to 24 | 4.3% | 3.6% | 5.2% |
| Age 25 to 34 | 6.5% | 4.9% | 13.8% |
| Age 35 to 44 | 14.1% | 7.8% | 12.9% |
| Age 45 to 54 | 17.5% | 12.9% | 12.6% |
| Age 55 to 59 | 5.7% | 10.1% | 6.7% |
| Age 60 to 64 | 4.9% | 9.4% | 6.3% |
| Age 65 to 74 | 8.4% | 12.4% | 9.6% |
| Age 75 to 84 | 2.6% | 6.3% | 4.5% |
| Age 85 and over | 0.8% | 1.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Irvington, NY | Upper Nyack, NY | United States |
| White | 81.0% | 69.0% | 59.4% |
| Black | 0.8% | 12.1% | 12.2% |
| Asian | 9.2% | 0.8% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.2% | 0.3% | 0.2% |
| Other | 0.0% | 0.4% | 0.4% |
| Two or More Races | 3.3% | 3.1% | 3.2% |
| Hispanic | 5.6% | 14.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Irvington, NY | Upper Nyack, NY | United States |
| Married Population | 67.7% | 56.4% | 49.8% |
| Currently Married | 67.4% | 54.7% | 48.0% |
| Married but Separated | 0.3% | 1.7% | 1.8% |
| Single Population | 32.3% | 43.6% | 50.2% |
| Never Married | 25.5% | 31.8% | 33.8% |
| Divorced | 4.7% | 6.7% | 10.8% |
| Widowed | 2.1% | 5.2% | 5.6% |
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| Household Size | 3.10 | 2.84 | 2.60 |
| Households | 2,109 | 778 | 124,010,992 |
| Family Households | 1,784 | 587 | 80,755,759 |
| Married couple, w/children | 57.6% | 38.0% | 30.5% |
| Married couple, no children | 31.4% | 49.7% | 42.9% |
| Non Family Households | 325 | 191 | 43,255,233 |
| Single householder, w/children | 5.5% | 5.8% | 15.8% |
| Single householder, no children | 5.4% | 6.5% | 10.8% |