| | Harrington Park, NJ | Nyack, NY | United States |
| Population | 4,801 | 7,303 | 329,725,481 |
| Female Population | 52.6% | 52.4% | 50.5% |
| Male Population | 47.5% | 47.6% | 49.5% |
| Median Age | 46.1 | 40.4 | 38.4 |
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| Population - 2010 | 4,672 | 6,787 | 309,327,143 |
| Population - 2000 | 4,740 | 6,737 | 285,036,114 |
| Population - 1990 | 4,623 | 6,558 | 251,960,433 |
| Pop. 2000 to Now | -1.0% | 5.9% | 15.6% |
| Pop. 1990 to Now | 1.5% | 8.8% | 30.8% |
| space4 | | | |
| Population Density | 2,600.8 | 9,484.4 | 93.4 |
| Land Area | 1.8 | 0.8 | 3,531,905.4 |
| Water Area | 0.2 | 0.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Harrington Park, NJ | Nyack, NY | United States |
| Age 0 to 4 | 7.4% | 4.8% | 5.9% |
| Age 5 to 9 | 6.4% | 5.3% | 6.1% |
| Age 10 to 14 | 6.7% | 6.1% | 6.6% |
| Age 15 to 17 | 5.2% | 1.5% | 3.9% |
| Age 18 to 20 | 1.0% | 0.8% | 4.0% |
| Age 21 to 24 | 3.6% | 4.7% | 5.2% |
| Age 25 to 34 | 6.4% | 13.5% | 13.8% |
| Age 35 to 44 | 11.2% | 18.2% | 12.9% |
| Age 45 to 54 | 14.6% | 11.1% | 12.6% |
| Age 55 to 59 | 13.6% | 7.2% | 6.7% |
| Age 60 to 64 | 5.3% | 6.0% | 6.3% |
| Age 65 to 74 | 5.0% | 13.4% | 9.6% |
| Age 75 to 84 | 7.4% | 6.0% | 4.5% |
| Age 85 and over | 6.3% | 1.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Harrington Park, NJ | Nyack, NY | United States |
| White | 70.8% | 54.8% | 59.4% |
| Black | 0.0% | 19.1% | 12.2% |
| Asian | 21.0% | 5.1% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.8% | 0.8% | 0.4% |
| Two or More Races | 3.0% | 1.7% | 3.2% |
| Hispanic | 4.4% | 18.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Harrington Park, NJ | Nyack, NY | United States |
| Married Population | 74.0% | 41.8% | 49.8% |
| Currently Married | 74.0% | 37.9% | 48.0% |
| Married but Separated | 0.0% | 3.9% | 1.8% |
| Single Population | 26.0% | 58.2% | 50.2% |
| Never Married | 17.3% | 41.7% | 33.8% |
| Divorced | 5.3% | 12.9% | 10.8% |
| Widowed | 3.4% | 3.6% | 5.6% |
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| Household Size | 2.76 | 2.29 | 2.60 |
| Households | 1,737 | 3,190 | 124,010,992 |
| Family Households | 1,503 | 1,478 | 80,755,759 |
| Married couple, w/children | 36.0% | 25.4% | 30.5% |
| Married couple, no children | 55.2% | 47.4% | 42.9% |
| Non Family Households | 234 | 1,712 | 43,255,233 |
| Single householder, w/children | 6.5% | 16.8% | 15.8% |
| Single householder, no children | 2.3% | 10.4% | 10.8% |