| | Reynoldsville, PA | Oil City, PA | United States |
| Population | 2,568 | 9,685 | 329,725,481 |
| Female Population | 48.0% | 49.4% | 50.5% |
| Male Population | 52.0% | 50.6% | 49.5% |
| Median Age | 37.4 | 41.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,756 | 10,540 | 309,327,143 |
| Population - 2000 | 2,710 | 11,504 | 285,036,114 |
| Population - 1990 | 2,818 | 11,949 | 251,960,433 |
| Pop. 2000 to Now | -3.1% | -17.1% | 15.6% |
| Pop. 1990 to Now | -6.9% | -20.1% | 30.8% |
| space4 | | | |
| Population Density | 1,752.9 | 2,155.6 | 93.4 |
| Land Area | 1.5 | 4.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Reynoldsville, PA | Oil City, PA | United States |
| Age 0 to 4 | 9.2% | 4.3% | 5.9% |
| Age 5 to 9 | 4.1% | 6.3% | 6.1% |
| Age 10 to 14 | 5.3% | 6.1% | 6.6% |
| Age 15 to 17 | 6.3% | 5.5% | 3.9% |
| Age 18 to 20 | 5.0% | 3.4% | 4.0% |
| Age 21 to 24 | 5.6% | 4.5% | 5.2% |
| Age 25 to 34 | 11.4% | 11.8% | 13.8% |
| Age 35 to 44 | 12.2% | 12.6% | 12.9% |
| Age 45 to 54 | 16.6% | 13.7% | 12.6% |
| Age 55 to 59 | 5.5% | 4.8% | 6.7% |
| Age 60 to 64 | 3.1% | 8.7% | 6.3% |
| Age 65 to 74 | 9.6% | 11.0% | 9.6% |
| Age 75 to 84 | 4.9% | 5.4% | 4.5% |
| Age 85 and over | 1.2% | 1.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Reynoldsville, PA | Oil City, PA | United States |
| White | 94.5% | 94.2% | 59.4% |
| Black | 1.6% | 1.2% | 12.2% |
| Asian | 0.9% | 0.1% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 2.1% | 2.5% | 3.2% |
| Hispanic | 0.9% | 2.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Reynoldsville, PA | Oil City, PA | United States |
| Married Population | 39.7% | 45.2% | 49.8% |
| Currently Married | 34.5% | 42.2% | 48.0% |
| Married but Separated | 5.2% | 3.0% | 1.8% |
| Single Population | 60.3% | 54.8% | 50.2% |
| Never Married | 39.9% | 30.9% | 33.8% |
| Divorced | 14.7% | 17.7% | 10.8% |
| Widowed | 5.7% | 6.2% | 5.6% |
| space5 | | | |
| Household Size | 2.56 | 2.34 | 2.60 |
| Households | 1,002 | 4,019 | 124,010,992 |
| Family Households | 584 | 2,285 | 80,755,759 |
| Married couple, w/children | 24.5% | 34.1% | 30.5% |
| Married couple, no children | 35.8% | 36.5% | 42.9% |
| Non Family Households | 418 | 1,734 | 43,255,233 |
| Single householder, w/children | 24.7% | 19.6% | 15.8% |
| Single householder, no children | 15.1% | 9.8% | 10.8% |