| | Lemont, PA | Collegeville, PA | United States |
| Population | 2,335 | 4,986 | 329,725,481 |
| Female Population | 46.6% | 57.7% | 50.5% |
| Male Population | 53.5% | 42.3% | 49.5% |
| Median Age | 43.7 | 25.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,398 | 5,094 | 309,327,143 |
| Population - 2000 | 2,116 | 8,032 | 285,036,114 |
| Population - 1990 | 1,539 | 4,227 | 251,960,433 |
| Pop. 2000 to Now | 6.4% | -36.6% | 15.6% |
| Pop. 1990 to Now | 46.3% | 20.5% | 30.8% |
| space4 | | | |
| Population Density | 1,842.9 | 3,171.8 | 93.4 |
| Land Area | 1.3 | 1.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Lemont, PA | Collegeville, PA | United States |
| Age 0 to 4 | 6.4% | 2.0% | 5.9% |
| Age 5 to 9 | 2.5% | 4.9% | 6.1% |
| Age 10 to 14 | 5.1% | 3.5% | 6.6% |
| Age 15 to 17 | 3.1% | 3.1% | 3.9% |
| Age 18 to 20 | 0.4% | 25.2% | 4.0% |
| Age 21 to 24 | 3.0% | 10.9% | 5.2% |
| Age 25 to 34 | 17.9% | 8.1% | 13.8% |
| Age 35 to 44 | 13.4% | 9.2% | 12.9% |
| Age 45 to 54 | 10.2% | 7.0% | 12.6% |
| Age 55 to 59 | 10.7% | 7.3% | 6.7% |
| Age 60 to 64 | 10.2% | 6.2% | 6.3% |
| Age 65 to 74 | 10.9% | 5.0% | 9.6% |
| Age 75 to 84 | 6.1% | 5.1% | 4.5% |
| Age 85 and over | 0.0% | 2.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Lemont, PA | Collegeville, PA | United States |
| White | 83.9% | 79.9% | 59.4% |
| Black | 1.1% | 7.0% | 12.2% |
| Asian | 1.4% | 5.5% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 7.1% | 4.0% | 3.2% |
| Hispanic | 6.5% | 3.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Lemont, PA | Collegeville, PA | United States |
| Married Population | 55.8% | 33.3% | 49.8% |
| Currently Married | 52.3% | 32.8% | 48.0% |
| Married but Separated | 3.5% | 0.6% | 1.8% |
| Single Population | 44.2% | 66.7% | 50.2% |
| Never Married | 30.2% | 53.5% | 33.8% |
| Divorced | 10.5% | 7.1% | 10.8% |
| Widowed | 3.4% | 6.1% | 5.6% |
| space5 | | | |
| Household Size | 2.24 | 2.13 | 2.60 |
| Households | 1,042 | 1,519 | 124,010,992 |
| Family Households | 652 | 761 | 80,755,759 |
| Married couple, w/children | 18.3% | 36.1% | 30.5% |
| Married couple, no children | 59.4% | 54.8% | 42.9% |
| Non Family Households | 390 | 758 | 43,255,233 |
| Single householder, w/children | 7.5% | 3.4% | 15.8% |
| Single householder, no children | 14.9% | 5.7% | 10.8% |