| | Upper Saucon, PA | East Lyme, CT | United States |
| Population | 16,863 | 18,798 | 329,725,481 |
| Female Population | 50.0% | 55.5% | 50.5% |
| Male Population | 50.0% | 44.5% | 49.5% |
| Median Age | 42.6 | 48.7 | 38.4 |
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| Population - 2010 | 14,846 | 19,137 | 309,327,143 |
| Population - 2000 | 11,939 | 18,118 | 285,036,114 |
| Population - 1990 | 9,775 | 15,340 | 251,960,433 |
| Pop. 2000 to Now | 46.1% | 2.3% | 15.6% |
| Pop. 1990 to Now | 78.4% | 20.8% | 30.8% |
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| Population Density | 689.4 | 552.5 | 93.4 |
| Land Area | 24.5 | 34.0 | 3,531,905.4 |
| Water Area | 0.2 | 8.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Upper Saucon, PA | East Lyme, CT | United States |
| Age 0 to 4 | 4.2% | 3.0% | 5.9% |
| Age 5 to 9 | 6.5% | 4.8% | 6.1% |
| Age 10 to 14 | 5.1% | 5.8% | 6.6% |
| Age 15 to 17 | 4.5% | 4.4% | 3.9% |
| Age 18 to 20 | 7.0% | 1.4% | 4.0% |
| Age 21 to 24 | 3.6% | 5.1% | 5.2% |
| Age 25 to 34 | 9.4% | 10.7% | 13.8% |
| Age 35 to 44 | 11.7% | 10.5% | 12.9% |
| Age 45 to 54 | 13.7% | 13.6% | 12.6% |
| Age 55 to 59 | 7.6% | 9.2% | 6.7% |
| Age 60 to 64 | 9.0% | 7.8% | 6.3% |
| Age 65 to 74 | 11.0% | 13.5% | 9.6% |
| Age 75 to 84 | 4.2% | 6.9% | 4.5% |
| Age 85 and over | 2.5% | 3.4% | 1.9% |
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| Race | | | |
| | Upper Saucon, PA | East Lyme, CT | United States |
| White | 85.9% | 77.8% | 59.4% |
| Black | 0.8% | 3.3% | 12.2% |
| Asian | 2.6% | 7.7% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.9% | 0.9% | 0.4% |
| Two or More Races | 4.9% | 3.7% | 3.2% |
| Hispanic | 5.0% | 6.6% | 18.4% |
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| Marriage & Family | | | |
| | Upper Saucon, PA | East Lyme, CT | United States |
| Married Population | 59.2% | 51.6% | 49.8% |
| Currently Married | 58.7% | 50.8% | 48.0% |
| Married but Separated | 0.5% | 0.7% | 1.8% |
| Single Population | 40.8% | 48.4% | 50.2% |
| Never Married | 28.9% | 28.4% | 33.8% |
| Divorced | 7.7% | 12.8% | 10.8% |
| Widowed | 4.2% | 7.3% | 5.6% |
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| Household Size | 2.68 | 2.28 | 2.60 |
| Households | 5,908 | 7,570 | 124,010,992 |
| Family Households | 4,799 | 4,903 | 80,755,759 |
| Married couple, w/children | 30.9% | 31.5% | 30.5% |
| Married couple, no children | 52.8% | 49.4% | 42.9% |
| Non Family Households | 1,109 | 2,667 | 43,255,233 |
| Single householder, w/children | 9.0% | 9.9% | 15.8% |
| Single householder, no children | 7.3% | 9.2% | 10.8% |