| | Dover Plains, NY | Yorktown Heights, NY | United States |
| Population | 1,289 | 1,953 | 329,725,481 |
| Female Population | 52.3% | 48.5% | 50.5% |
| Male Population | 47.7% | 51.5% | 49.5% |
| Median Age | 46.1 | 52.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,314 | 1,669 | 309,327,143 |
| Population - 2000 | 1,996 | 7,972 | 285,036,114 |
| Population - 1990 | 1,847 | 7,690 | 251,960,433 |
| Pop. 2000 to Now | -47.2% | -79.7% | 15.6% |
| Pop. 1990 to Now | -42.9% | -79.0% | 30.8% |
| space4 | | | |
| Population Density | 1,906.8 | 2,136.8 | 93.4 |
| Land Area | 0.7 | 0.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Dover Plains, NY | Yorktown Heights, NY | United States |
| Age 0 to 4 | 4.8% | 2.5% | 5.9% |
| Age 5 to 9 | 3.8% | 8.6% | 6.1% |
| Age 10 to 14 | 4.3% | 1.0% | 6.6% |
| Age 15 to 17 | 1.6% | 1.4% | 3.9% |
| Age 18 to 20 | 4.0% | 1.0% | 4.0% |
| Age 21 to 24 | 2.6% | 3.3% | 5.2% |
| Age 25 to 34 | 19.3% | 14.4% | 13.8% |
| Age 35 to 44 | 9.5% | 13.5% | 12.9% |
| Age 45 to 54 | 12.0% | 5.9% | 12.6% |
| Age 55 to 59 | 11.9% | 12.4% | 6.7% |
| Age 60 to 64 | 9.2% | 6.9% | 6.3% |
| Age 65 to 74 | 8.6% | 18.9% | 9.6% |
| Age 75 to 84 | 4.7% | 8.4% | 4.5% |
| Age 85 and over | 3.6% | 1.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Dover Plains, NY | Yorktown Heights, NY | United States |
| White | 74.2% | 72.4% | 59.4% |
| Black | 0.9% | 0.1% | 12.2% |
| Asian | 0.0% | 2.2% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 10.9% | 0.0% | 3.2% |
| Hispanic | 14.0% | 25.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Dover Plains, NY | Yorktown Heights, NY | United States |
| Married Population | 44.3% | 58.6% | 49.8% |
| Currently Married | 41.8% | 57.7% | 48.0% |
| Married but Separated | 2.6% | 0.8% | 1.8% |
| Single Population | 55.7% | 41.4% | 50.2% |
| Never Married | 36.2% | 29.5% | 33.8% |
| Divorced | 12.5% | 11.1% | 10.8% |
| Widowed | 7.0% | 0.9% | 5.6% |
| space5 | | | |
| Household Size | 2.19 | 2.55 | 2.60 |
| Households | 575 | 765 | 124,010,992 |
| Family Households | 315 | 597 | 80,755,759 |
| Married couple, w/children | 3.2% | 23.6% | 30.5% |
| Married couple, no children | 63.2% | 59.0% | 42.9% |
| Non Family Households | 260 | 168 | 43,255,233 |
| Single householder, w/children | 17.1% | 2.3% | 15.8% |
| Single householder, no children | 16.5% | 15.1% | 10.8% |