| | Monsey, NY | Suffern, NY | United States |
| Population | 27,359 | 11,376 | 329,725,481 |
| Female Population | 49.0% | 53.3% | 50.5% |
| Male Population | 51.0% | 46.7% | 49.5% |
| Median Age | 14.6 | 44.6 | 38.4 |
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| Population - 2010 | 15,050 | 10,744 | 309,327,143 |
| Population - 2000 | 14,504 | 11,006 | 285,036,114 |
| Population - 1990 | 13,986 | 11,055 | 251,960,433 |
| Pop. 2000 to Now | 53.5% | -0.3% | 15.6% |
| Pop. 1990 to Now | 59.2% | -0.8% | 30.8% |
| space4 | | | |
| Population Density | 12,057.7 | 5,424.9 | 93.4 |
| Land Area | 2.3 | 2.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Monsey, NY | Suffern, NY | United States |
| Age 0 to 4 | 19.3% | 4.3% | 5.9% |
| Age 5 to 9 | 16.9% | 5.1% | 6.1% |
| Age 10 to 14 | 14.9% | 5.9% | 6.6% |
| Age 15 to 17 | 7.1% | 4.6% | 3.9% |
| Age 18 to 20 | 4.8% | 2.4% | 4.0% |
| Age 21 to 24 | 4.7% | 4.1% | 5.2% |
| Age 25 to 34 | 8.7% | 11.3% | 13.8% |
| Age 35 to 44 | 10.9% | 12.6% | 12.9% |
| Age 45 to 54 | 4.0% | 15.0% | 12.6% |
| Age 55 to 59 | 1.3% | 8.7% | 6.7% |
| Age 60 to 64 | 2.1% | 5.5% | 6.3% |
| Age 65 to 74 | 3.2% | 11.6% | 9.6% |
| Age 75 to 84 | 1.4% | 6.6% | 4.5% |
| Age 85 and over | 0.8% | 2.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Monsey, NY | Suffern, NY | United States |
| White | 95.2% | 57.8% | 59.4% |
| Black | 2.9% | 13.8% | 12.2% |
| Asian | 0.1% | 6.9% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 1.2% | 3.1% | 3.2% |
| Hispanic | 0.6% | 18.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Monsey, NY | Suffern, NY | United States |
| Married Population | 64.8% | 48.7% | 49.8% |
| Currently Married | 64.0% | 46.4% | 48.0% |
| Married but Separated | 0.8% | 2.3% | 1.8% |
| Single Population | 35.2% | 51.3% | 50.2% |
| Never Married | 30.0% | 32.3% | 33.8% |
| Divorced | 3.4% | 13.1% | 10.8% |
| Widowed | 1.8% | 5.9% | 5.6% |
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| Household Size | 5.84 | 2.36 | 2.60 |
| Households | 4,608 | 4,715 | 124,010,992 |
| Family Households | 4,386 | 2,750 | 80,755,759 |
| Married couple, w/children | 76.2% | 30.2% | 30.5% |
| Married couple, no children | 18.7% | 45.6% | 42.9% |
| Non Family Households | 222 | 1,965 | 43,255,233 |
| Single householder, w/children | 2.8% | 13.2% | 15.8% |
| Single householder, no children | 2.3% | 10.9% | 10.8% |