| | Souderton, PA | South Bend, WA | United States |
| Population | 7,131 | 1,728 | 329,725,481 |
| Female Population | 53.3% | 47.4% | 50.5% |
| Male Population | 46.7% | 52.6% | 49.5% |
| Median Age | 36.5 | 44.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 6,630 | 1,631 | 309,327,143 |
| Population - 2000 | 6,730 | 1,807 | 285,036,114 |
| Population - 1990 | 5,957 | 1,551 | 251,960,433 |
| Pop. 2000 to Now | 5.7% | -4.2% | 15.6% |
| Pop. 1990 to Now | 19.4% | 11.6% | 30.8% |
| space4 | | | |
| Population Density | 6,361.3 | 1,069.3 | 93.4 |
| Land Area | 1.1 | 1.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.4 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Souderton, PA | South Bend, WA | United States |
| Age 0 to 4 | 8.7% | 6.1% | 5.9% |
| Age 5 to 9 | 5.8% | 2.7% | 6.1% |
| Age 10 to 14 | 5.1% | 5.8% | 6.6% |
| Age 15 to 17 | 4.6% | 4.6% | 3.9% |
| Age 18 to 20 | 2.9% | 4.1% | 4.0% |
| Age 21 to 24 | 3.9% | 5.7% | 5.2% |
| Age 25 to 34 | 16.9% | 8.2% | 13.8% |
| Age 35 to 44 | 12.5% | 13.6% | 12.9% |
| Age 45 to 54 | 11.9% | 9.5% | 12.6% |
| Age 55 to 59 | 7.3% | 7.6% | 6.7% |
| Age 60 to 64 | 8.2% | 10.4% | 6.3% |
| Age 65 to 74 | 7.8% | 15.0% | 9.6% |
| Age 75 to 84 | 3.1% | 4.6% | 4.5% |
| Age 85 and over | 1.2% | 2.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Souderton, PA | South Bend, WA | United States |
| White | 73.4% | 58.3% | 59.4% |
| Black | 2.0% | 3.5% | 12.2% |
| Asian | 5.2% | 4.7% | 5.6% |
| Native American | 0.0% | 0.9% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.3% | 0.4% |
| Two or More Races | 1.2% | 12.2% | 3.2% |
| Hispanic | 18.1% | 20.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Souderton, PA | South Bend, WA | United States |
| Married Population | 52.9% | 47.7% | 49.8% |
| Currently Married | 52.4% | 47.1% | 48.0% |
| Married but Separated | 0.5% | 0.6% | 1.8% |
| Single Population | 47.1% | 52.3% | 50.2% |
| Never Married | 33.3% | 29.6% | 33.8% |
| Divorced | 9.4% | 14.9% | 10.8% |
| Widowed | 4.4% | 7.8% | 5.6% |
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| Household Size | 2.60 | 2.58 | 2.60 |
| Households | 2,737 | 643 | 124,010,992 |
| Family Households | 1,962 | 401 | 80,755,759 |
| Married couple, w/children | 29.7% | 21.4% | 30.5% |
| Married couple, no children | 43.4% | 49.1% | 42.9% |
| Non Family Households | 775 | 242 | 43,255,233 |
| Single householder, w/children | 17.8% | 25.7% | 15.8% |
| Single householder, no children | 9.1% | 3.7% | 10.8% |