| | Jamestown, PA | Farrell, PA | United States |
| Population | 631 | 4,329 | 329,725,481 |
| Female Population | 55.3% | 52.3% | 50.5% |
| Male Population | 44.7% | 47.7% | 49.5% |
| Median Age | 42 | 39.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 616 | 4,947 | 309,327,143 |
| Population - 2000 | 636 | 6,050 | 285,036,114 |
| Population - 1990 | 761 | 6,841 | 251,960,433 |
| Pop. 2000 to Now | -10.7% | -24.9% | 15.6% |
| Pop. 1990 to Now | -25.4% | -33.6% | 30.8% |
| space4 | | | |
| Population Density | 757.5 | 1,904.5 | 93.4 |
| Land Area | 0.8 | 2.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Jamestown, PA | Farrell, PA | United States |
| Age 0 to 4 | 4.6% | 5.3% | 5.9% |
| Age 5 to 9 | 5.5% | 8.2% | 6.1% |
| Age 10 to 14 | 10.8% | 8.5% | 6.6% |
| Age 15 to 17 | 4.1% | 5.6% | 3.9% |
| Age 18 to 20 | 2.4% | 2.9% | 4.0% |
| Age 21 to 24 | 5.2% | 6.0% | 5.2% |
| Age 25 to 34 | 7.6% | 7.8% | 13.8% |
| Age 35 to 44 | 15.2% | 11.5% | 12.9% |
| Age 45 to 54 | 8.4% | 9.2% | 12.6% |
| Age 55 to 59 | 6.2% | 4.9% | 6.7% |
| Age 60 to 64 | 9.4% | 8.7% | 6.3% |
| Age 65 to 74 | 9.8% | 10.7% | 9.6% |
| Age 75 to 84 | 7.8% | 5.5% | 4.5% |
| Age 85 and over | 3.0% | 5.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Jamestown, PA | Farrell, PA | United States |
| White | 99.4% | 37.0% | 59.4% |
| Black | 0.5% | 53.2% | 12.2% |
| Asian | 0.0% | 0.0% | 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 | 0.2% | 5.8% | 3.2% |
| Hispanic | 0.0% | 4.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Jamestown, PA | Farrell, PA | United States |
| Married Population | 50.7% | 32.3% | 49.8% |
| Currently Married | 49.9% | 25.9% | 48.0% |
| Married but Separated | 0.8% | 6.5% | 1.8% |
| Single Population | 49.3% | 67.7% | 50.2% |
| Never Married | 25.9% | 42.1% | 33.8% |
| Divorced | 12.2% | 12.4% | 10.8% |
| Widowed | 11.2% | 13.2% | 5.6% |
| space5 | | | |
| Household Size | 2.24 | 2.09 | 2.60 |
| Households | 282 | 2,040 | 124,010,992 |
| Family Households | 169 | 1,085 | 80,755,759 |
| Married couple, w/children | 31.4% | 5.5% | 30.5% |
| Married couple, no children | 41.4% | 30.3% | 42.9% |
| Non Family Households | 113 | 955 | 43,255,233 |
| Single householder, w/children | 20.7% | 48.8% | 15.8% |
| Single householder, no children | 6.5% | 15.3% | 10.8% |