| | Union Dale, PA | Forest City, PA | United States |
| Population | 140 | 1,658 | 329,725,481 |
| Female Population | 47.9% | 50.5% | 50.5% |
| Male Population | 52.1% | 49.5% | 49.5% |
| Median Age | 60.8 | 48.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 262 | 1,883 | 309,327,143 |
| Population - 2000 | 368 | 1,855 | 285,036,114 |
| Population - 1990 | 342 | 1,846 | 251,960,433 |
| Pop. 2000 to Now | -35.3% | -7.2% | 15.6% |
| Pop. 1990 to Now | -30.4% | -6.8% | 30.8% |
| space4 | | | |
| Population Density | 58.2 | 1,812.0 | 93.4 |
| Land Area | 2.4 | 0.9 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Union Dale, PA | Forest City, PA | United States |
| Age 0 to 4 | 0.0% | 7.3% | 5.9% |
| Age 5 to 9 | 0.0% | 6.2% | 6.1% |
| Age 10 to 14 | 0.0% | 1.1% | 6.6% |
| Age 15 to 17 | 0.0% | 0.8% | 3.9% |
| Age 18 to 20 | 1.4% | 3.4% | 4.0% |
| Age 21 to 24 | 4.3% | 7.5% | 5.2% |
| Age 25 to 34 | 11.4% | 12.4% | 13.8% |
| Age 35 to 44 | 4.3% | 8.4% | 12.9% |
| Age 45 to 54 | 10.0% | 10.7% | 12.6% |
| Age 55 to 59 | 15.0% | 8.1% | 6.7% |
| Age 60 to 64 | 22.9% | 6.2% | 6.3% |
| Age 65 to 74 | 19.3% | 10.3% | 9.6% |
| Age 75 to 84 | 7.1% | 8.1% | 4.5% |
| Age 85 and over | 4.3% | 9.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Union Dale, PA | Forest City, PA | United States |
| White | 97.1% | 91.3% | 59.4% |
| Black | 0.0% | 4.1% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.7% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.3% | 0.4% |
| Two or More Races | 0.0% | 1.0% | 3.2% |
| Hispanic | 2.1% | 3.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Union Dale, PA | Forest City, PA | United States |
| Married Population | 62.9% | 33.5% | 49.8% |
| Currently Married | 60.7% | 32.1% | 48.0% |
| Married but Separated | 2.1% | 1.4% | 1.8% |
| Single Population | 37.1% | 66.5% | 50.2% |
| Never Married | 17.9% | 35.9% | 33.8% |
| Divorced | 5.7% | 16.5% | 10.8% |
| Widowed | 13.6% | 14.1% | 5.6% |
| space5 | | | |
| Household Size | 1.73 | 2.19 | 2.60 |
| Households | 81 | 714 | 124,010,992 |
| Family Households | 42 | 368 | 80,755,759 |
| Married couple, w/children | 0.0% | 11.4% | 30.5% |
| Married couple, no children | 92.9% | 45.4% | 42.9% |
| Non Family Households | 39 | 346 | 43,255,233 |
| Single householder, w/children | 0.0% | 26.1% | 15.8% |
| Single householder, no children | 7.1% | 17.1% | 10.8% |