| | East Earl, PA | Willow Grove, PA | United States |
| Population | 1,268 | 13,958 | 329,725,481 |
| Female Population | 48.0% | 50.7% | 50.5% |
| Male Population | 52.0% | 49.3% | 49.5% |
| Median Age | 48.7 | 37.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,550 | 16,456 | 309,327,143 |
| Population - 2000 | 907 | 16,234 | 285,036,114 |
| Population - 1990 | 860 | 16,325 | 251,960,433 |
| Pop. 2000 to Now | 54.2% | -4.2% | 15.6% |
| Pop. 1990 to Now | 62.7% | -4.7% | 30.8% |
| space4 | | | |
| Population Density | 1,348.9 | 3,814.7 | 93.4 |
| Land Area | 0.9 | 3.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | East Earl, PA | Willow Grove, PA | United States |
| Age 0 to 4 | 2.4% | 7.0% | 5.9% |
| Age 5 to 9 | 2.1% | 5.3% | 6.1% |
| Age 10 to 14 | 9.9% | 7.3% | 6.6% |
| Age 15 to 17 | 4.4% | 3.3% | 3.9% |
| Age 18 to 20 | 5.3% | 3.5% | 4.0% |
| Age 21 to 24 | 4.8% | 4.1% | 5.2% |
| Age 25 to 34 | 3.1% | 15.3% | 13.8% |
| Age 35 to 44 | 15.9% | 12.6% | 12.9% |
| Age 45 to 54 | 10.8% | 14.3% | 12.6% |
| Age 55 to 59 | 4.9% | 6.7% | 6.7% |
| Age 60 to 64 | 7.1% | 5.7% | 6.3% |
| Age 65 to 74 | 20.7% | 8.5% | 9.6% |
| Age 75 to 84 | 6.9% | 3.7% | 4.5% |
| Age 85 and over | 1.7% | 2.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | East Earl, PA | Willow Grove, PA | United States |
| White | 91.3% | 75.5% | 59.4% |
| Black | 0.0% | 8.5% | 12.2% |
| Asian | 3.4% | 3.3% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 0.0% | 5.7% | 3.2% |
| Hispanic | 5.3% | 6.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | East Earl, PA | Willow Grove, PA | United States |
| Married Population | 75.5% | 53.9% | 49.8% |
| Currently Married | 75.5% | 52.5% | 48.0% |
| Married but Separated | 0.0% | 1.4% | 1.8% |
| Single Population | 24.5% | 46.1% | 50.2% |
| Never Married | 20.5% | 29.2% | 33.8% |
| Divorced | 4.0% | 11.1% | 10.8% |
| Widowed | 0.0% | 5.8% | 5.6% |
| space5 | | | |
| Household Size | 2.97 | 2.58 | 2.60 |
| Households | 427 | 5,311 | 124,010,992 |
| Family Households | 413 | 3,530 | 80,755,759 |
| Married couple, w/children | 20.8% | 40.8% | 30.5% |
| Married couple, no children | 68.8% | 37.6% | 42.9% |
| Non Family Households | 14 | 1,781 | 43,255,233 |
| Single householder, w/children | 7.5% | 9.5% | 15.8% |
| Single householder, no children | 2.9% | 12.0% | 10.8% |