| | Greenwood Lake, NY | Ridge, NY | United States |
| Population | 3,055 | 12,931 | 329,725,481 |
| Female Population | 48.9% | 54.1% | 50.5% |
| Male Population | 51.1% | 45.9% | 49.5% |
| Median Age | 38.3 | 48.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,154 | 13,172 | 309,327,143 |
| Population - 2000 | 3,411 | 13,380 | 285,036,114 |
| Population - 1990 | 3,208 | 11,734 | 251,960,433 |
| Pop. 2000 to Now | -10.5% | -4.3% | 15.6% |
| Pop. 1990 to Now | -4.8% | 9.1% | 30.8% |
| space4 | | | |
| Population Density | 1,510.1 | 979.6 | 93.4 |
| Land Area | 2.0 | 13.2 | 3,531,905.4 |
| Water Area | 0.4 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Greenwood Lake, NY | Ridge, NY | United States |
| Age 0 to 4 | 7.5% | 3.0% | 5.9% |
| Age 5 to 9 | 1.2% | 3.8% | 6.1% |
| Age 10 to 14 | 7.6% | 6.1% | 6.6% |
| Age 15 to 17 | 1.7% | 3.8% | 3.9% |
| Age 18 to 20 | 3.8% | 3.3% | 4.0% |
| Age 21 to 24 | 1.3% | 3.0% | 5.2% |
| Age 25 to 34 | 22.2% | 8.9% | 13.8% |
| Age 35 to 44 | 8.5% | 10.1% | 12.9% |
| Age 45 to 54 | 12.9% | 13.3% | 12.6% |
| Age 55 to 59 | 9.5% | 7.0% | 6.7% |
| Age 60 to 64 | 8.5% | 7.4% | 6.3% |
| Age 65 to 74 | 12.9% | 13.8% | 9.6% |
| Age 75 to 84 | 2.3% | 12.1% | 4.5% |
| Age 85 and over | 0.0% | 4.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Greenwood Lake, NY | Ridge, NY | United States |
| White | 83.0% | 82.8% | 59.4% |
| Black | 1.5% | 6.6% | 12.2% |
| Asian | 4.4% | 2.1% | 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 | 0.0% | 1.7% | 3.2% |
| Hispanic | 11.1% | 6.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Greenwood Lake, NY | Ridge, NY | United States |
| Married Population | 54.5% | 52.1% | 49.8% |
| Currently Married | 54.1% | 50.6% | 48.0% |
| Married but Separated | 0.4% | 1.5% | 1.8% |
| Single Population | 45.5% | 47.9% | 50.2% |
| Never Married | 32.9% | 25.3% | 33.8% |
| Divorced | 8.2% | 11.4% | 10.8% |
| Widowed | 4.4% | 11.2% | 5.6% |
| space5 | | | |
| Household Size | 2.74 | 2.23 | 2.60 |
| Households | 1,114 | 5,751 | 124,010,992 |
| Family Households | 797 | 3,244 | 80,755,759 |
| Married couple, w/children | 27.7% | 32.4% | 30.5% |
| Married couple, no children | 54.7% | 50.3% | 42.9% |
| Non Family Households | 317 | 2,507 | 43,255,233 |
| Single householder, w/children | 8.7% | 3.0% | 15.8% |
| Single householder, no children | 8.9% | 14.3% | 10.8% |