| | Yorktown, NY | North Salem, NY | United States |
| Population | 36,424 | 5,241 | 329,725,481 |
| Female Population | 50.4% | 50.9% | 50.5% |
| Male Population | 49.6% | 49.1% | 49.5% |
| Median Age | 45.7 | 45.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 36,170 | 5,138 | 309,327,143 |
| Population - 2000 | 36,318 | 5,173 | 285,036,114 |
| Population - 1990 | 33,467 | 4,725 | 251,960,433 |
| Pop. 2000 to Now | -0.9% | -1.4% | 15.6% |
| Pop. 1990 to Now | 7.5% | 7.9% | 30.8% |
| space4 | | | |
| Population Density | 994.0 | 245.8 | 93.4 |
| Land Area | 36.6 | 21.3 | 3,531,905.4 |
| Water Area | 2.6 | 1.5 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Yorktown, NY | North Salem, NY | United States |
| Age 0 to 4 | 5.7% | 6.4% | 5.9% |
| Age 5 to 9 | 6.2% | 5.5% | 6.1% |
| Age 10 to 14 | 4.9% | 7.7% | 6.6% |
| Age 15 to 17 | 4.1% | 4.1% | 3.9% |
| Age 18 to 20 | 2.9% | 1.0% | 4.0% |
| Age 21 to 24 | 4.4% | 2.3% | 5.2% |
| Age 25 to 34 | 10.1% | 7.9% | 13.8% |
| Age 35 to 44 | 10.9% | 14.7% | 12.9% |
| Age 45 to 54 | 14.1% | 11.2% | 12.6% |
| Age 55 to 59 | 8.6% | 9.7% | 6.7% |
| Age 60 to 64 | 8.0% | 8.1% | 6.3% |
| Age 65 to 74 | 11.6% | 11.3% | 9.6% |
| Age 75 to 84 | 5.8% | 6.4% | 4.5% |
| Age 85 and over | 2.7% | 3.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Yorktown, NY | North Salem, NY | United States |
| White | 74.4% | 84.3% | 59.4% |
| Black | 5.8% | 2.9% | 12.2% |
| Asian | 5.0% | 4.8% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.2% | 0.0% | 0.2% |
| Other | 1.1% | 0.0% | 0.4% |
| Two or More Races | 1.6% | 1.8% | 3.2% |
| Hispanic | 11.9% | 6.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Yorktown, NY | North Salem, NY | United States |
| Married Population | 60.7% | 64.9% | 49.8% |
| Currently Married | 59.8% | 63.6% | 48.0% |
| Married but Separated | 1.0% | 1.3% | 1.8% |
| Single Population | 39.3% | 35.1% | 50.2% |
| Never Married | 26.7% | 20.2% | 33.8% |
| Divorced | 5.5% | 8.4% | 10.8% |
| Widowed | 7.1% | 6.5% | 5.6% |
| space5 | | | |
| Household Size | 2.75 | 2.70 | 2.60 |
| Households | 13,108 | 1,861 | 124,010,992 |
| Family Households | 10,183 | 1,385 | 80,755,759 |
| Married couple, w/children | 32.6% | 39.4% | 30.5% |
| Married couple, no children | 52.0% | 48.3% | 42.9% |
| Non Family Households | 2,925 | 476 | 43,255,233 |
| Single householder, w/children | 7.5% | 4.5% | 15.8% |
| Single householder, no children | 7.8% | 7.8% | 10.8% |