| | Ellwood City, PA | Bellefonte, PA | United States |
| Population | 7,555 | 6,181 | 329,725,481 |
| Female Population | 49.2% | 48.1% | 50.5% |
| Male Population | 50.8% | 51.9% | 49.5% |
| Median Age | 44.4 | 41.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 7,833 | 6,191 | 309,327,143 |
| Population - 2000 | 8,688 | 6,395 | 285,036,114 |
| Population - 1990 | 8,894 | 6,358 | 251,960,433 |
| Pop. 2000 to Now | -16.8% | -3.2% | 15.6% |
| Pop. 1990 to Now | -18.8% | -2.7% | 30.8% |
| space4 | | | |
| Population Density | 3,250.9 | 3,341.1 | 93.4 |
| Land Area | 2.3 | 1.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Ellwood City, PA | Bellefonte, PA | United States |
| Age 0 to 4 | 5.9% | 3.9% | 5.9% |
| Age 5 to 9 | 5.3% | 5.4% | 6.1% |
| Age 10 to 14 | 4.4% | 5.7% | 6.6% |
| Age 15 to 17 | 2.8% | 1.1% | 3.9% |
| Age 18 to 20 | 2.1% | 0.7% | 4.0% |
| Age 21 to 24 | 5.8% | 4.9% | 5.2% |
| Age 25 to 34 | 13.7% | 17.8% | 13.8% |
| Age 35 to 44 | 10.3% | 13.4% | 12.9% |
| Age 45 to 54 | 9.1% | 14.4% | 12.6% |
| Age 55 to 59 | 10.2% | 6.8% | 6.7% |
| Age 60 to 64 | 10.0% | 6.3% | 6.3% |
| Age 65 to 74 | 11.9% | 9.2% | 9.6% |
| Age 75 to 84 | 6.6% | 5.6% | 4.5% |
| Age 85 and over | 2.1% | 4.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Ellwood City, PA | Bellefonte, PA | United States |
| White | 95.5% | 90.4% | 59.4% |
| Black | 2.1% | 1.7% | 12.2% |
| Asian | 0.0% | 2.2% | 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 | 1.4% | 2.8% | 3.2% |
| Hispanic | 0.7% | 2.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Ellwood City, PA | Bellefonte, PA | United States |
| Married Population | 50.6% | 48.7% | 49.8% |
| Currently Married | 46.4% | 47.5% | 48.0% |
| Married but Separated | 4.2% | 1.2% | 1.8% |
| Single Population | 49.4% | 51.3% | 50.2% |
| Never Married | 28.5% | 27.1% | 33.8% |
| Divorced | 12.8% | 14.8% | 10.8% |
| Widowed | 8.1% | 9.4% | 5.6% |
| space5 | | | |
| Household Size | 2.02 | 2.07 | 2.60 |
| Households | 3,732 | 2,868 | 124,010,992 |
| Family Households | 2,136 | 1,557 | 80,755,759 |
| Married couple, w/children | 21.9% | 27.9% | 30.5% |
| Married couple, no children | 46.8% | 52.0% | 42.9% |
| Non Family Households | 1,596 | 1,311 | 43,255,233 |
| Single householder, w/children | 20.2% | 12.2% | 15.8% |
| Single householder, no children | 11.1% | 7.9% | 10.8% |