| | North Huntingdon, PA | Zelienople, PA | United States |
| Population | 31,654 | 3,874 | 329,725,481 |
| Female Population | 49.5% | 56.9% | 50.5% |
| Male Population | 50.5% | 43.1% | 49.5% |
| Median Age | 43.6 | 42.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 30,635 | 3,813 | 309,327,143 |
| Population - 2000 | 29,123 | 4,123 | 285,036,114 |
| Population - 1990 | 28,158 | 4,158 | 251,960,433 |
| Pop. 2000 to Now | 4.0% | -12.1% | 15.6% |
| Pop. 1990 to Now | 7.6% | -12.9% | 30.8% |
| space4 | | | |
| Population Density | 1,161.2 | 1,890.7 | 93.4 |
| Land Area | 27.3 | 2.0 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | North Huntingdon, PA | Zelienople, PA | United States |
| Age 0 to 4 | 4.6% | 4.0% | 5.9% |
| Age 5 to 9 | 6.2% | 5.3% | 6.1% |
| Age 10 to 14 | 6.9% | 5.9% | 6.6% |
| Age 15 to 17 | 3.5% | 1.5% | 3.9% |
| Age 18 to 20 | 3.1% | 1.3% | 4.0% |
| Age 21 to 24 | 3.7% | 7.0% | 5.2% |
| Age 25 to 34 | 10.6% | 12.1% | 13.8% |
| Age 35 to 44 | 12.5% | 14.5% | 12.9% |
| Age 45 to 54 | 14.0% | 13.3% | 12.6% |
| Age 55 to 59 | 8.2% | 4.0% | 6.7% |
| Age 60 to 64 | 7.0% | 5.7% | 6.3% |
| Age 65 to 74 | 11.9% | 6.8% | 9.6% |
| Age 75 to 84 | 5.1% | 3.9% | 4.5% |
| Age 85 and over | 2.8% | 14.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | North Huntingdon, PA | Zelienople, PA | United States |
| White | 93.2% | 96.9% | 59.4% |
| Black | 1.6% | 1.9% | 12.2% |
| Asian | 1.3% | 0.3% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.2% | 0.0% | 0.4% |
| Two or More Races | 2.1% | 0.0% | 3.2% |
| Hispanic | 1.6% | 1.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | North Huntingdon, PA | Zelienople, PA | United States |
| Married Population | 59.2% | 45.0% | 49.8% |
| Currently Married | 58.3% | 44.5% | 48.0% |
| Married but Separated | 0.8% | 0.5% | 1.8% |
| Single Population | 40.8% | 55.0% | 50.2% |
| Never Married | 23.7% | 27.4% | 33.8% |
| Divorced | 9.8% | 9.9% | 10.8% |
| Widowed | 7.3% | 17.7% | 5.6% |
| space5 | | | |
| Household Size | 2.44 | 1.86 | 2.60 |
| Households | 12,910 | 2,079 | 124,010,992 |
| Family Households | 9,035 | 854 | 80,755,759 |
| Married couple, w/children | 35.9% | 40.3% | 30.5% |
| Married couple, no children | 47.1% | 44.6% | 42.9% |
| Non Family Households | 3,875 | 1,225 | 43,255,233 |
| Single householder, w/children | 7.6% | 10.7% | 15.8% |
| Single householder, no children | 9.5% | 4.5% | 10.8% |