| | Newtown township, PA | Devon, PA | United States |
| Population | 19,800 | 1,981 | 329,725,481 |
| Female Population | 50.6% | 52.8% | 50.5% |
| Male Population | 49.4% | 47.3% | 49.5% |
| Median Age | 45.2 | 44.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 19,310 | 1,544 | 309,327,143 |
| Population - 2000 | 18,206 | 1,443 | 285,036,114 |
| Population - 1990 | 13,685 | 1,332 | 251,960,433 |
| Pop. 2000 to Now | 7.3% | 24.0% | 15.6% |
| Pop. 1990 to Now | 42.7% | 34.3% | 30.8% |
| space4 | | | |
| Population Density | 1,663.9 | 3,242.2 | 93.4 |
| Land Area | 11.9 | 0.6 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Newtown township, PA | Devon, PA | United States |
| Age 0 to 4 | 6.2% | 2.4% | 5.9% |
| Age 5 to 9 | 4.6% | 4.3% | 6.1% |
| Age 10 to 14 | 6.5% | 10.6% | 6.6% |
| Age 15 to 17 | 4.9% | 9.5% | 3.9% |
| Age 18 to 20 | 1.6% | 5.1% | 4.0% |
| Age 21 to 24 | 3.4% | 1.9% | 5.2% |
| Age 25 to 34 | 7.6% | 8.5% | 13.8% |
| Age 35 to 44 | 15.0% | 8.2% | 12.9% |
| Age 45 to 54 | 17.6% | 22.9% | 12.6% |
| Age 55 to 59 | 6.6% | 13.0% | 6.7% |
| Age 60 to 64 | 8.3% | 3.6% | 6.3% |
| Age 65 to 74 | 11.0% | 8.7% | 9.6% |
| Age 75 to 84 | 4.6% | 1.4% | 4.5% |
| Age 85 and over | 1.9% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Newtown township, PA | Devon, PA | United States |
| White | 77.7% | 83.7% | 59.4% |
| Black | 2.0% | 2.1% | 12.2% |
| Asian | 10.5% | 2.4% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.6% | 0.0% | 0.4% |
| Two or More Races | 5.3% | 2.7% | 3.2% |
| Hispanic | 3.9% | 9.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Newtown township, PA | Devon, PA | United States |
| Married Population | 64.1% | 59.5% | 49.8% |
| Currently Married | 62.7% | 59.5% | 48.0% |
| Married but Separated | 1.4% | 0.0% | 1.8% |
| Single Population | 35.9% | 40.5% | 50.2% |
| Never Married | 23.2% | 35.4% | 33.8% |
| Divorced | 9.0% | 0.0% | 10.8% |
| Widowed | 3.6% | 5.1% | 5.6% |
| space5 | | | |
| Household Size | 2.53 | 3.08 | 2.60 |
| Households | 7,781 | 627 | 124,010,992 |
| Family Households | 5,695 | 507 | 80,755,759 |
| Married couple, w/children | 45.3% | 55.6% | 30.5% |
| Married couple, no children | 41.1% | 37.1% | 42.9% |
| Non Family Households | 2,086 | 120 | 43,255,233 |
| Single householder, w/children | 7.2% | 0.0% | 15.8% |
| Single householder, no children | 6.5% | 7.3% | 10.8% |