| | Middletown township (Bucks County), PA | Levittown, PA | United States |
| Population | 45,903 | 51,100 | 329,725,481 |
| Female Population | 51.9% | 51.0% | 50.5% |
| Male Population | 48.1% | 49.0% | 49.5% |
| Median Age | 42.9 | 40.2 | 38.4 |
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| Population - 2010 | 45,472 | 51,990 | 309,327,143 |
| Population - 2000 | 44,141 | 53,966 | 285,036,114 |
| Population - 1990 | 43,063 | 55,362 | 251,960,433 |
| Pop. 2000 to Now | 1.7% | -3.4% | 15.6% |
| Pop. 1990 to Now | 4.3% | -5.8% | 30.8% |
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| Population Density | 2,428.2 | 5,030.0 | 93.4 |
| Land Area | 18.9 | 10.2 | 3,531,905.4 |
| Water Area | 0.4 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Middletown township (Bucks County), PA | Levittown, PA | United States |
| Age 0 to 4 | 5.9% | 5.7% | 5.9% |
| Age 5 to 9 | 4.9% | 4.9% | 6.1% |
| Age 10 to 14 | 4.9% | 5.5% | 6.6% |
| Age 15 to 17 | 3.8% | 4.5% | 3.9% |
| Age 18 to 20 | 3.0% | 3.5% | 4.0% |
| Age 21 to 24 | 4.7% | 5.2% | 5.2% |
| Age 25 to 34 | 12.4% | 13.5% | 13.8% |
| Age 35 to 44 | 12.7% | 14.7% | 12.9% |
| Age 45 to 54 | 11.6% | 12.3% | 12.6% |
| Age 55 to 59 | 8.4% | 7.3% | 6.7% |
| Age 60 to 64 | 7.6% | 7.2% | 6.3% |
| Age 65 to 74 | 10.0% | 9.2% | 9.6% |
| Age 75 to 84 | 5.8% | 4.1% | 4.5% |
| Age 85 and over | 4.2% | 2.3% | 1.9% |
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| Race | | | |
| | Middletown township (Bucks County), PA | Levittown, PA | United States |
| White | 81.2% | 80.9% | 59.4% |
| Black | 4.5% | 4.3% | 12.2% |
| Asian | 3.4% | 2.5% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.8% | 0.3% | 0.4% |
| Two or More Races | 3.7% | 3.7% | 3.2% |
| Hispanic | 6.4% | 8.3% | 18.4% |
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| Marriage & Family | | | |
| | Middletown township (Bucks County), PA | Levittown, PA | United States |
| Married Population | 55.8% | 50.8% | 49.8% |
| Currently Married | 54.8% | 49.1% | 48.0% |
| Married but Separated | 1.0% | 1.7% | 1.8% |
| Single Population | 44.2% | 49.2% | 50.2% |
| Never Married | 30.4% | 34.2% | 33.8% |
| Divorced | 6.6% | 8.8% | 10.8% |
| Widowed | 7.3% | 6.2% | 5.6% |
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| Household Size | 2.70 | 2.90 | 2.60 |
| Households | 16,611 | 17,541 | 124,010,992 |
| Family Households | 12,606 | 13,411 | 80,755,759 |
| Married couple, w/children | 31.6% | 30.6% | 30.5% |
| Married couple, no children | 47.6% | 41.3% | 42.9% |
| Non Family Households | 4,005 | 4,130 | 43,255,233 |
| Single householder, w/children | 10.4% | 14.3% | 15.8% |
| Single householder, no children | 10.4% | 13.8% | 10.8% |