| | Upper Nazareth, PA | Langhorne, PA | United States |
| Population | 7,897 | 1,655 | 329,725,481 |
| Female Population | 49.2% | 48.3% | 50.5% |
| Male Population | 50.8% | 51.7% | 49.5% |
| Median Age | 43.1 | 46.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 6,248 | 1,545 | 309,327,143 |
| Population - 2000 | 4,426 | 1,981 | 285,036,114 |
| Population - 1990 | 3,413 | 1,361 | 251,960,433 |
| Pop. 2000 to Now | 61.7% | -23.9% | 15.6% |
| Pop. 1990 to Now | 109.6% | 10.7% | 30.8% |
| space4 | | | |
| Population Density | 1,074.4 | 3,363.8 | 93.4 |
| Land Area | 7.4 | 0.5 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Upper Nazareth, PA | Langhorne, PA | United States |
| Age 0 to 4 | 5.5% | 3.3% | 5.9% |
| Age 5 to 9 | 5.7% | 4.7% | 6.1% |
| Age 10 to 14 | 9.0% | 4.0% | 6.6% |
| Age 15 to 17 | 4.8% | 5.3% | 3.9% |
| Age 18 to 20 | 2.0% | 4.8% | 4.0% |
| Age 21 to 24 | 2.9% | 4.5% | 5.2% |
| Age 25 to 34 | 11.1% | 10.4% | 13.8% |
| Age 35 to 44 | 11.1% | 12.2% | 12.9% |
| Age 45 to 54 | 18.1% | 11.7% | 12.6% |
| Age 55 to 59 | 6.8% | 7.6% | 6.7% |
| Age 60 to 64 | 4.2% | 11.5% | 6.3% |
| Age 65 to 74 | 8.7% | 9.4% | 9.6% |
| Age 75 to 84 | 4.9% | 4.5% | 4.5% |
| Age 85 and over | 5.2% | 6.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Upper Nazareth, PA | Langhorne, PA | United States |
| White | 90.6% | 86.3% | 59.4% |
| Black | 0.6% | 5.7% | 12.2% |
| Asian | 0.6% | 1.1% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.4% | 0.4% |
| Two or More Races | 0.6% | 1.6% | 3.2% |
| Hispanic | 7.6% | 4.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Upper Nazareth, PA | Langhorne, PA | United States |
| Married Population | 60.2% | 45.1% | 49.8% |
| Currently Married | 59.9% | 44.3% | 48.0% |
| Married but Separated | 0.3% | 0.8% | 1.8% |
| Single Population | 39.8% | 54.9% | 50.2% |
| Never Married | 23.1% | 41.4% | 33.8% |
| Divorced | 8.8% | 6.6% | 10.8% |
| Widowed | 7.8% | 6.9% | 5.6% |
| space5 | | | |
| Household Size | 2.97 | 2.27 | 2.60 |
| Households | 2,423 | 580 | 124,010,992 |
| Family Households | 2,000 | 360 | 80,755,759 |
| Married couple, w/children | 46.8% | 24.7% | 30.5% |
| Married couple, no children | 39.9% | 58.9% | 42.9% |
| Non Family Households | 423 | 220 | 43,255,233 |
| Single householder, w/children | 7.1% | 11.4% | 15.8% |
| Single householder, no children | 6.3% | 5.0% | 10.8% |