| | Swarthmore, PA | Pullman, WA | United States |
| Population | 6,560 | 32,968 | 329,725,481 |
| Female Population | 51.6% | 49.0% | 50.5% |
| Male Population | 48.4% | 51.0% | 49.5% |
| Median Age | 35.9 | 22.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 6,191 | 29,834 | 309,327,143 |
| Population - 2000 | 6,170 | 24,675 | 285,036,114 |
| Population - 1990 | 6,157 | 23,478 | 251,960,433 |
| Pop. 2000 to Now | 3.3% | 39.2% | 15.6% |
| Pop. 1990 to Now | 3.5% | 46.3% | 30.8% |
| space4 | | | |
| Population Density | 4,685.7 | 3,089.5 | 93.4 |
| Land Area | 1.4 | 10.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Swarthmore, PA | Pullman, WA | United States |
| Age 0 to 4 | 4.5% | 3.9% | 5.9% |
| Age 5 to 9 | 3.9% | 3.8% | 6.1% |
| Age 10 to 14 | 8.5% | 2.9% | 6.6% |
| Age 15 to 17 | 5.5% | 1.6% | 3.9% |
| Age 18 to 20 | 16.1% | 26.1% | 4.0% |
| Age 21 to 24 | 6.3% | 21.9% | 5.2% |
| Age 25 to 34 | 4.0% | 15.5% | 13.8% |
| Age 35 to 44 | 13.6% | 8.9% | 12.9% |
| Age 45 to 54 | 11.5% | 5.0% | 12.6% |
| Age 55 to 59 | 6.2% | 2.5% | 6.7% |
| Age 60 to 64 | 3.3% | 2.0% | 6.3% |
| Age 65 to 74 | 8.0% | 3.6% | 9.6% |
| Age 75 to 84 | 6.6% | 1.8% | 4.5% |
| Age 85 and over | 2.1% | 0.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Swarthmore, PA | Pullman, WA | United States |
| White | 77.4% | 70.7% | 59.4% |
| Black | 6.0% | 2.8% | 12.2% |
| Asian | 7.3% | 11.9% | 5.6% |
| Native American | 0.2% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 0.2% | 0.7% | 0.4% |
| Two or More Races | 4.5% | 5.7% | 3.2% |
| Hispanic | 4.3% | 7.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Swarthmore, PA | Pullman, WA | United States |
| Married Population | 49.1% | 27.9% | 49.8% |
| Currently Married | 47.5% | 26.4% | 48.0% |
| Married but Separated | 1.7% | 1.5% | 1.8% |
| Single Population | 50.9% | 72.1% | 50.2% |
| Never Married | 39.4% | 65.2% | 33.8% |
| Divorced | 9.0% | 5.8% | 10.8% |
| Widowed | 2.5% | 1.2% | 5.6% |
| space5 | | | |
| Household Size | 2.39 | 2.19 | 2.60 |
| Households | 2,163 | 11,927 | 124,010,992 |
| Family Households | 1,440 | 4,473 | 80,755,759 |
| Married couple, w/children | 54.7% | 32.5% | 30.5% |
| Married couple, no children | 32.8% | 48.1% | 42.9% |
| Non Family Households | 723 | 7,454 | 43,255,233 |
| Single householder, w/children | 8.1% | 14.3% | 15.8% |
| Single householder, no children | 4.4% | 5.1% | 10.8% |