| | Emsworth, PA | Etna, PA | United States |
| Population | 2,551 | 3,426 | 329,725,481 |
| Female Population | 49.2% | 48.4% | 50.5% |
| Male Population | 50.8% | 51.6% | 49.5% |
| Median Age | 36.8 | 38.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,440 | 3,441 | 309,327,143 |
| Population - 2000 | 2,598 | 3,924 | 285,036,114 |
| Population - 1990 | 2,892 | 4,200 | 251,960,433 |
| Pop. 2000 to Now | -10.2% | -16.3% | 15.6% |
| Pop. 1990 to Now | -19.3% | -21.8% | 30.8% |
| space4 | | | |
| Population Density | 4,483.3 | 4,693.2 | 93.4 |
| Land Area | 0.6 | 0.7 | 3,531,905.4 |
| Water Area | 0.1 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Emsworth, PA | Etna, PA | United States |
| Age 0 to 4 | 7.2% | 5.8% | 5.9% |
| Age 5 to 9 | 3.2% | 5.9% | 6.1% |
| Age 10 to 14 | 6.9% | 7.6% | 6.6% |
| Age 15 to 17 | 7.3% | 1.1% | 3.9% |
| Age 18 to 20 | 2.7% | 4.3% | 4.0% |
| Age 21 to 24 | 2.2% | 3.1% | 5.2% |
| Age 25 to 34 | 18.6% | 17.5% | 13.8% |
| Age 35 to 44 | 13.3% | 13.7% | 12.9% |
| Age 45 to 54 | 10.6% | 10.2% | 12.6% |
| Age 55 to 59 | 4.7% | 7.7% | 6.7% |
| Age 60 to 64 | 8.4% | 7.2% | 6.3% |
| Age 65 to 74 | 8.2% | 7.8% | 9.6% |
| Age 75 to 84 | 5.1% | 5.3% | 4.5% |
| Age 85 and over | 1.8% | 2.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Emsworth, PA | Etna, PA | United States |
| White | 78.4% | 87.3% | 59.4% |
| Black | 10.1% | 3.4% | 12.2% |
| Asian | 1.3% | 4.2% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.8% | 0.0% | 0.4% |
| Two or More Races | 2.1% | 3.2% | 3.2% |
| Hispanic | 7.3% | 2.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Emsworth, PA | Etna, PA | United States |
| Married Population | 49.4% | 43.5% | 49.8% |
| Currently Married | 48.7% | 36.9% | 48.0% |
| Married but Separated | 0.8% | 6.6% | 1.8% |
| Single Population | 50.6% | 56.5% | 50.2% |
| Never Married | 36.8% | 35.6% | 33.8% |
| Divorced | 10.4% | 16.6% | 10.8% |
| Widowed | 3.5% | 4.3% | 5.6% |
| space5 | | | |
| Household Size | 2.17 | 2.13 | 2.60 |
| Households | 1,130 | 1,607 | 124,010,992 |
| Family Households | 610 | 863 | 80,755,759 |
| Married couple, w/children | 35.9% | 23.3% | 30.5% |
| Married couple, no children | 43.8% | 36.0% | 42.9% |
| Non Family Households | 520 | 744 | 43,255,233 |
| Single householder, w/children | 14.1% | 21.3% | 15.8% |
| Single householder, no children | 6.2% | 19.4% | 10.8% |