| | Lambertville, NJ | Levittown, PA | United States |
| Population | 4,116 | 51,100 | 329,725,481 |
| Female Population | 50.6% | 51.0% | 50.5% |
| Male Population | 49.4% | 49.0% | 49.5% |
| Median Age | 53.4 | 40.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,923 | 51,990 | 309,327,143 |
| Population - 2000 | 3,868 | 53,966 | 285,036,114 |
| Population - 1990 | 3,927 | 55,362 | 251,960,433 |
| Pop. 2000 to Now | -2.0% | -3.4% | 15.6% |
| Pop. 1990 to Now | -3.5% | -5.8% | 30.8% |
| space4 | | | |
| Population Density | 3,797.1 | 5,030.0 | 93.4 |
| Land Area | 1.1 | 10.2 | 3,531,905.4 |
| Water Area | 0.1 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Lambertville, NJ | Levittown, PA | United States |
| Age 0 to 4 | 5.0% | 5.7% | 5.9% |
| Age 5 to 9 | 2.1% | 4.9% | 6.1% |
| Age 10 to 14 | 3.3% | 5.5% | 6.6% |
| Age 15 to 17 | 4.3% | 4.5% | 3.9% |
| Age 18 to 20 | 1.5% | 3.5% | 4.0% |
| Age 21 to 24 | 2.3% | 5.2% | 5.2% |
| Age 25 to 34 | 11.8% | 13.5% | 13.8% |
| Age 35 to 44 | 9.2% | 14.7% | 12.9% |
| Age 45 to 54 | 13.8% | 12.3% | 12.6% |
| Age 55 to 59 | 6.4% | 7.3% | 6.7% |
| Age 60 to 64 | 14.9% | 7.2% | 6.3% |
| Age 65 to 74 | 21.7% | 9.2% | 9.6% |
| Age 75 to 84 | 2.4% | 4.1% | 4.5% |
| Age 85 and over | 1.2% | 2.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Lambertville, NJ | Levittown, PA | United States |
| White | 82.3% | 80.9% | 59.4% |
| Black | 0.0% | 4.3% | 12.2% |
| Asian | 2.5% | 2.5% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.3% | 0.4% |
| Two or More Races | 0.3% | 3.7% | 3.2% |
| Hispanic | 15.0% | 8.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Lambertville, NJ | Levittown, PA | United States |
| Married Population | 48.0% | 50.8% | 49.8% |
| Currently Married | 44.7% | 49.1% | 48.0% |
| Married but Separated | 3.3% | 1.7% | 1.8% |
| Single Population | 52.0% | 49.2% | 50.2% |
| Never Married | 26.9% | 34.2% | 33.8% |
| Divorced | 21.0% | 8.8% | 10.8% |
| Widowed | 4.1% | 6.2% | 5.6% |
| space5 | | | |
| Household Size | 2.07 | 2.90 | 2.60 |
| Households | 1,969 | 17,541 | 124,010,992 |
| Family Households | 944 | 13,411 | 80,755,759 |
| Married couple, w/children | 26.7% | 30.6% | 30.5% |
| Married couple, no children | 57.6% | 41.3% | 42.9% |
| Non Family Households | 1,025 | 4,130 | 43,255,233 |
| Single householder, w/children | 8.9% | 14.3% | 15.8% |
| Single householder, no children | 6.8% | 13.8% | 10.8% |