| | Tonawanda, NY | North Tonawanda, NY | United States |
| Population | 15,132 | 30,592 | 329,725,481 |
| Female Population | 49.3% | 50.7% | 50.5% |
| Male Population | 50.7% | 49.3% | 49.5% |
| Median Age | 43.6 | 45 | 38.4 |
| space3 | | | |
| Population - 2010 | 15,158 | 31,548 | 309,327,143 |
| Population - 2000 | 16,136 | 33,262 | 285,036,114 |
| Population - 1990 | 17,284 | 34,989 | 251,960,433 |
| Pop. 2000 to Now | -8.6% | -9.7% | 15.6% |
| Pop. 1990 to Now | -14.6% | -14.1% | 30.8% |
| space4 | | | |
| Population Density | 3,979.0 | 3,028.9 | 93.4 |
| Land Area | 3.8 | 10.1 | 3,531,905.4 |
| Water Area | 0.3 | 0.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Tonawanda, NY | North Tonawanda, NY | United States |
| Age 0 to 4 | 5.2% | 4.5% | 5.9% |
| Age 5 to 9 | 4.4% | 4.2% | 6.1% |
| Age 10 to 14 | 5.5% | 4.9% | 6.6% |
| Age 15 to 17 | 4.1% | 3.4% | 3.9% |
| Age 18 to 20 | 3.5% | 2.5% | 4.0% |
| Age 21 to 24 | 3.2% | 4.2% | 5.2% |
| Age 25 to 34 | 12.5% | 16.7% | 13.8% |
| Age 35 to 44 | 13.7% | 9.5% | 12.9% |
| Age 45 to 54 | 11.7% | 14.3% | 12.6% |
| Age 55 to 59 | 7.8% | 9.2% | 6.7% |
| Age 60 to 64 | 9.7% | 7.8% | 6.3% |
| Age 65 to 74 | 12.1% | 11.4% | 9.6% |
| Age 75 to 84 | 5.2% | 4.8% | 4.5% |
| Age 85 and over | 1.5% | 2.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Tonawanda, NY | North Tonawanda, NY | United States |
| White | 92.6% | 93.1% | 59.4% |
| Black | 0.3% | 1.6% | 12.2% |
| Asian | 2.0% | 0.8% | 5.6% |
| Native American | 0.1% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.1% | 0.4% |
| Two or More Races | 2.9% | 2.7% | 3.2% |
| Hispanic | 2.0% | 1.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Tonawanda, NY | North Tonawanda, NY | United States |
| Married Population | 51.3% | 49.4% | 49.8% |
| Currently Married | 49.4% | 47.1% | 48.0% |
| Married but Separated | 1.8% | 2.3% | 1.8% |
| Single Population | 48.7% | 50.6% | 50.2% |
| Never Married | 31.8% | 32.4% | 33.8% |
| Divorced | 9.9% | 11.2% | 10.8% |
| Widowed | 7.0% | 7.1% | 5.6% |
| space5 | | | |
| Household Size | 2.17 | 2.21 | 2.60 |
| Households | 6,947 | 13,775 | 124,010,992 |
| Family Households | 4,025 | 8,087 | 80,755,759 |
| Married couple, w/children | 28.6% | 23.8% | 30.5% |
| Married couple, no children | 48.2% | 50.0% | 42.9% |
| Non Family Households | 2,922 | 5,688 | 43,255,233 |
| Single householder, w/children | 13.6% | 12.4% | 15.8% |
| Single householder, no children | 9.6% | 13.8% | 10.8% |