| | White Plains, NY | New Rochelle, NY | United States |
| Population | 59,452 | 80,685 | 329,725,481 |
| Female Population | 51.6% | 51.8% | 50.5% |
| Male Population | 48.4% | 48.2% | 49.5% |
| Median Age | 41.4 | 40.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 56,903 | 77,178 | 309,327,143 |
| Population - 2000 | 53,077 | 72,182 | 285,036,114 |
| Population - 1990 | 48,718 | 67,265 | 251,960,433 |
| Pop. 2000 to Now | 9.8% | 12.2% | 15.6% |
| Pop. 1990 to Now | 19.6% | 20.4% | 30.8% |
| space4 | | | |
| Population Density | 6,071.5 | 7,795.7 | 93.4 |
| Land Area | 9.8 | 10.4 | 3,531,905.4 |
| Water Area | 0.1 | 2.9 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | White Plains, NY | New Rochelle, NY | United States |
| Age 0 to 4 | 5.2% | 4.3% | 5.9% |
| Age 5 to 9 | 5.2% | 6.1% | 6.1% |
| Age 10 to 14 | 4.8% | 5.9% | 6.6% |
| Age 15 to 17 | 3.1% | 4.5% | 3.9% |
| Age 18 to 20 | 3.3% | 5.3% | 4.0% |
| Age 21 to 24 | 5.7% | 6.3% | 5.2% |
| Age 25 to 34 | 14.8% | 11.0% | 13.8% |
| Age 35 to 44 | 12.3% | 11.9% | 12.9% |
| Age 45 to 54 | 12.6% | 13.6% | 12.6% |
| Age 55 to 59 | 7.3% | 7.5% | 6.7% |
| Age 60 to 64 | 6.9% | 6.2% | 6.3% |
| Age 65 to 74 | 10.5% | 9.8% | 9.6% |
| Age 75 to 84 | 5.1% | 5.3% | 4.5% |
| Age 85 and over | 3.1% | 2.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | White Plains, NY | New Rochelle, NY | United States |
| White | 46.4% | 43.1% | 59.4% |
| Black | 11.9% | 19.0% | 12.2% |
| Asian | 7.6% | 6.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 1.2% | 0.5% | 0.4% |
| Two or More Races | 2.1% | 1.3% | 3.2% |
| Hispanic | 30.8% | 29.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | White Plains, NY | New Rochelle, NY | United States |
| Married Population | 50.1% | 49.8% | 49.8% |
| Currently Married | 47.7% | 47.5% | 48.0% |
| Married but Separated | 2.4% | 2.3% | 1.8% |
| Single Population | 49.9% | 50.2% | 50.2% |
| Never Married | 36.8% | 36.2% | 33.8% |
| Divorced | 8.0% | 8.3% | 10.8% |
| Widowed | 5.1% | 5.7% | 5.6% |
| space5 | | | |
| Household Size | 2.46 | 2.65 | 2.60 |
| Households | 23,709 | 29,353 | 124,010,992 |
| Family Households | 14,382 | 19,344 | 80,755,759 |
| Married couple, w/children | 32.2% | 34.2% | 30.5% |
| Married couple, no children | 44.2% | 39.1% | 42.9% |
| Non Family Households | 9,327 | 10,009 | 43,255,233 |
| Single householder, w/children | 11.0% | 12.9% | 15.8% |
| Single householder, no children | 12.6% | 13.9% | 10.8% |