| | Forest Hills, PA | North Versailles, PA | United States |
| Population | 6,408 | 10,061 | 329,725,481 |
| Female Population | 46.9% | 55.6% | 50.5% |
| Male Population | 53.1% | 44.4% | 49.5% |
| Median Age | 43.5 | 46.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 6,541 | 10,247 | 309,327,143 |
| Population - 2000 | 6,831 | 11,125 | 285,036,114 |
| Population - 1990 | 7,335 | 12,302 | 251,960,433 |
| Pop. 2000 to Now | -8.4% | -11.3% | 15.6% |
| Pop. 1990 to Now | -14.7% | -19.8% | 30.8% |
| space4 | | | |
| Population Density | 4,097.2 | 1,253.4 | 93.4 |
| Land Area | 1.6 | 8.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Forest Hills, PA | North Versailles, PA | United States |
| Age 0 to 4 | 5.8% | 4.6% | 5.9% |
| Age 5 to 9 | 4.1% | 7.2% | 6.1% |
| Age 10 to 14 | 4.0% | 5.8% | 6.6% |
| Age 15 to 17 | 0.7% | 2.6% | 3.9% |
| Age 18 to 20 | 1.8% | 3.0% | 4.0% |
| Age 21 to 24 | 4.3% | 2.8% | 5.2% |
| Age 25 to 34 | 19.7% | 10.7% | 13.8% |
| Age 35 to 44 | 11.1% | 11.6% | 12.9% |
| Age 45 to 54 | 8.8% | 12.0% | 12.6% |
| Age 55 to 59 | 7.9% | 6.4% | 6.7% |
| Age 60 to 64 | 10.7% | 8.1% | 6.3% |
| Age 65 to 74 | 12.0% | 14.9% | 9.6% |
| Age 75 to 84 | 5.4% | 6.1% | 4.5% |
| Age 85 and over | 3.6% | 4.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Forest Hills, PA | North Versailles, PA | United States |
| White | 79.8% | 75.1% | 59.4% |
| Black | 12.9% | 16.5% | 12.2% |
| Asian | 0.8% | 0.2% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.0% | 0.2% |
| Other | 0.2% | 0.5% | 0.4% |
| Two or More Races | 3.4% | 2.4% | 3.2% |
| Hispanic | 2.8% | 5.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Forest Hills, PA | North Versailles, PA | United States |
| Married Population | 49.7% | 50.7% | 49.8% |
| Currently Married | 47.5% | 46.7% | 48.0% |
| Married but Separated | 2.2% | 4.1% | 1.8% |
| Single Population | 50.3% | 49.3% | 50.2% |
| Never Married | 36.2% | 31.2% | 33.8% |
| Divorced | 9.2% | 7.7% | 10.8% |
| Widowed | 4.8% | 10.3% | 5.6% |
| space5 | | | |
| Household Size | 2.02 | 2.19 | 2.60 |
| Households | 3,178 | 4,568 | 124,010,992 |
| Family Households | 1,667 | 2,596 | 80,755,759 |
| Married couple, w/children | 19.3% | 24.5% | 30.5% |
| Married couple, no children | 50.4% | 46.6% | 42.9% |
| Non Family Households | 1,511 | 1,972 | 43,255,233 |
| Single householder, w/children | 15.3% | 16.2% | 15.8% |
| Single householder, no children | 15.1% | 12.6% | 10.8% |