| | Lansdowne, PA | East Lansdowne, PA | United States |
| Population | 11,007 | 2,700 | 329,725,481 |
| Female Population | 50.7% | 54.7% | 50.5% |
| Male Population | 49.3% | 45.3% | 49.5% |
| Median Age | 42.8 | 32.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 10,618 | 2,668 | 309,327,143 |
| Population - 2000 | 11,044 | 2,586 | 285,036,114 |
| Population - 1990 | 11,712 | 2,691 | 251,960,433 |
| Pop. 2000 to Now | -3.7% | 3.2% | 15.6% |
| Pop. 1990 to Now | -9.1% | -0.9% | 30.8% |
| space4 | | | |
| Population Density | 9,320.1 | 13,106.8 | 93.4 |
| Land Area | 1.2 | 0.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Lansdowne, PA | East Lansdowne, PA | United States |
| Age 0 to 4 | 4.2% | 4.3% | 5.9% |
| Age 5 to 9 | 7.3% | 5.9% | 6.1% |
| Age 10 to 14 | 6.2% | 6.4% | 6.6% |
| Age 15 to 17 | 2.8% | 2.3% | 3.9% |
| Age 18 to 20 | 2.2% | 4.2% | 4.0% |
| Age 21 to 24 | 5.1% | 3.6% | 5.2% |
| Age 25 to 34 | 11.6% | 24.4% | 13.8% |
| Age 35 to 44 | 13.9% | 10.5% | 12.9% |
| Age 45 to 54 | 11.1% | 13.7% | 12.6% |
| Age 55 to 59 | 11.2% | 6.4% | 6.7% |
| Age 60 to 64 | 8.0% | 5.3% | 6.3% |
| Age 65 to 74 | 13.4% | 10.9% | 9.6% |
| Age 75 to 84 | 2.1% | 1.9% | 4.5% |
| Age 85 and over | 0.9% | 0.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Lansdowne, PA | East Lansdowne, PA | United States |
| White | 39.9% | 16.6% | 59.4% |
| Black | 48.1% | 59.5% | 12.2% |
| Asian | 2.2% | 11.9% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.1% | 0.3% | 0.4% |
| Two or More Races | 4.0% | 8.5% | 3.2% |
| Hispanic | 5.7% | 3.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Lansdowne, PA | East Lansdowne, PA | United States |
| Married Population | 41.5% | 40.0% | 49.8% |
| Currently Married | 39.0% | 36.8% | 48.0% |
| Married but Separated | 2.5% | 3.2% | 1.8% |
| Single Population | 58.5% | 60.0% | 50.2% |
| Never Married | 39.0% | 46.9% | 33.8% |
| Divorced | 14.9% | 10.3% | 10.8% |
| Widowed | 4.6% | 2.8% | 5.6% |
| space5 | | | |
| Household Size | 2.29 | 2.39 | 2.60 |
| Households | 4,790 | 1,122 | 124,010,992 |
| Family Households | 2,625 | 563 | 80,755,759 |
| Married couple, w/children | 24.8% | 21.0% | 30.5% |
| Married couple, no children | 34.3% | 43.0% | 42.9% |
| Non Family Households | 2,165 | 559 | 43,255,233 |
| Single householder, w/children | 24.2% | 24.9% | 15.8% |
| Single householder, no children | 16.8% | 11.2% | 10.8% |