| | East Petersburg, PA | Tappan, NY | United States |
| Population | 4,581 | 7,153 | 329,725,481 |
| Female Population | 50.0% | 50.7% | 50.5% |
| Male Population | 50.0% | 49.3% | 49.5% |
| Median Age | 44.5 | 45 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,508 | 6,179 | 309,327,143 |
| Population - 2000 | 4,450 | 6,757 | 285,036,114 |
| Population - 1990 | 4,197 | 6,867 | 251,960,433 |
| Pop. 2000 to Now | 0.8% | 5.4% | 15.6% |
| Pop. 1990 to Now | 6.9% | 3.7% | 30.8% |
| space4 | | | |
| Population Density | 3,792.2 | 2,594.5 | 93.4 |
| Land Area | 1.2 | 2.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | East Petersburg, PA | Tappan, NY | United States |
| Age 0 to 4 | 3.1% | 3.6% | 5.9% |
| Age 5 to 9 | 9.8% | 4.1% | 6.1% |
| Age 10 to 14 | 5.0% | 7.6% | 6.6% |
| Age 15 to 17 | 3.9% | 4.8% | 3.9% |
| Age 18 to 20 | 0.8% | 3.0% | 4.0% |
| Age 21 to 24 | 1.8% | 5.4% | 5.2% |
| Age 25 to 34 | 11.4% | 10.2% | 13.8% |
| Age 35 to 44 | 14.8% | 11.2% | 12.9% |
| Age 45 to 54 | 15.7% | 16.5% | 12.6% |
| Age 55 to 59 | 6.9% | 8.4% | 6.7% |
| Age 60 to 64 | 6.5% | 6.5% | 6.3% |
| Age 65 to 74 | 11.6% | 8.5% | 9.6% |
| Age 75 to 84 | 5.7% | 7.4% | 4.5% |
| Age 85 and over | 3.0% | 2.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | East Petersburg, PA | Tappan, NY | United States |
| White | 73.6% | 71.3% | 59.4% |
| Black | 5.2% | 4.5% | 12.2% |
| Asian | 1.3% | 11.9% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 6.5% | 0.8% | 3.2% |
| Hispanic | 13.4% | 11.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | East Petersburg, PA | Tappan, NY | United States |
| Married Population | 68.4% | 60.7% | 49.8% |
| Currently Married | 68.4% | 60.2% | 48.0% |
| Married but Separated | 0.0% | 0.5% | 1.8% |
| Single Population | 31.6% | 39.3% | 50.2% |
| Never Married | 16.7% | 27.8% | 33.8% |
| Divorced | 9.4% | 6.9% | 10.8% |
| Widowed | 5.5% | 4.6% | 5.6% |
| space5 | | | |
| Household Size | 2.40 | 3.15 | 2.60 |
| Households | 1,907 | 2,265 | 124,010,992 |
| Family Households | 1,456 | 1,885 | 80,755,759 |
| Married couple, w/children | 39.8% | 41.4% | 30.5% |
| Married couple, no children | 48.4% | 45.7% | 42.9% |
| Non Family Households | 451 | 380 | 43,255,233 |
| Single householder, w/children | 5.5% | 3.5% | 15.8% |
| Single householder, no children | 6.3% | 9.3% | 10.8% |