| | Farrell, PA | Elizabeth, NJ | United States |
| Population | 4,329 | 135,772 | 329,725,481 |
| Female Population | 52.3% | 50.5% | 50.5% |
| Male Population | 47.7% | 49.5% | 49.5% |
| Median Age | 39.8 | 35.3 | 38.4 |
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| Population - 2010 | 4,947 | 125,260 | 309,327,143 |
| Population - 2000 | 6,050 | 120,568 | 285,036,114 |
| Population - 1990 | 6,841 | 110,002 | 251,960,433 |
| Pop. 2000 to Now | -24.9% | 6.5% | 15.6% |
| Pop. 1990 to Now | -33.6% | 16.7% | 30.8% |
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| Population Density | 1,904.5 | 11,021.4 | 93.4 |
| Land Area | 2.3 | 12.3 | 3,531,905.4 |
| Water Area | 0.0 | 1.3 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Farrell, PA | Elizabeth, NJ | United States |
| Age 0 to 4 | 5.3% | 7.6% | 5.9% |
| Age 5 to 9 | 8.2% | 7.1% | 6.1% |
| Age 10 to 14 | 8.5% | 7.3% | 6.6% |
| Age 15 to 17 | 5.6% | 4.0% | 3.9% |
| Age 18 to 20 | 2.9% | 4.5% | 4.0% |
| Age 21 to 24 | 6.0% | 5.1% | 5.2% |
| Age 25 to 34 | 7.8% | 13.8% | 13.8% |
| Age 35 to 44 | 11.5% | 15.4% | 12.9% |
| Age 45 to 54 | 9.2% | 13.1% | 12.6% |
| Age 55 to 59 | 4.9% | 6.2% | 6.7% |
| Age 60 to 64 | 8.7% | 5.1% | 6.3% |
| Age 65 to 74 | 10.7% | 6.3% | 9.6% |
| Age 75 to 84 | 5.5% | 3.3% | 4.5% |
| Age 85 and over | 5.2% | 1.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Farrell, PA | Elizabeth, NJ | United States |
| White | 37.0% | 13.5% | 59.4% |
| Black | 53.2% | 16.9% | 12.2% |
| Asian | 0.0% | 1.7% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 1.3% | 0.4% |
| Two or More Races | 5.8% | 1.4% | 3.2% |
| Hispanic | 4.0% | 65.3% | 18.4% |
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| Marriage & Family | | | |
| | Farrell, PA | Elizabeth, NJ | United States |
| Married Population | 32.3% | 41.5% | 49.8% |
| Currently Married | 25.9% | 38.0% | 48.0% |
| Married but Separated | 6.5% | 3.5% | 1.8% |
| Single Population | 67.7% | 58.5% | 50.2% |
| Never Married | 42.1% | 45.0% | 33.8% |
| Divorced | 12.4% | 9.0% | 10.8% |
| Widowed | 13.2% | 4.5% | 5.6% |
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| Household Size | 2.09 | 3.02 | 2.60 |
| Households | 2,040 | 44,354 | 124,010,992 |
| Family Households | 1,085 | 31,483 | 80,755,759 |
| Married couple, w/children | 5.5% | 29.7% | 30.5% |
| Married couple, no children | 30.3% | 25.5% | 42.9% |
| Non Family Households | 955 | 12,871 | 43,255,233 |
| Single householder, w/children | 48.8% | 28.7% | 15.8% |
| Single householder, no children | 15.3% | 16.1% | 10.8% |