| | Hamlin, PA | Emmaus, PA | United States |
| Population | 667 | 11,589 | 329,725,481 |
| Female Population | 50.2% | 49.2% | 50.5% |
| Male Population | 49.8% | 50.8% | 49.5% |
| Median Age | 53.7 | 42 | 38.4 |
| space3 | | | |
| Population - 2010 | 732 | 11,190 | 309,327,143 |
| Population - 2000 | 819 | 11,313 | 285,036,114 |
| Population - 1990 | 822 | 11,157 | 251,960,433 |
| Pop. 2000 to Now | -17.3% | 1.6% | 15.6% |
| Pop. 1990 to Now | -17.6% | 3.0% | 30.8% |
| space4 | | | |
| Population Density | 10.4 | 4,003.1 | 93.4 |
| Land Area | 64.2 | 2.9 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Hamlin, PA | Emmaus, PA | United States |
| Age 0 to 4 | 1.6% | 5.7% | 5.9% |
| Age 5 to 9 | 9.3% | 4.7% | 6.1% |
| Age 10 to 14 | 2.1% | 6.1% | 6.6% |
| Age 15 to 17 | 1.2% | 2.6% | 3.9% |
| Age 18 to 20 | 1.0% | 2.3% | 4.0% |
| Age 21 to 24 | 6.1% | 5.7% | 5.2% |
| Age 25 to 34 | 15.0% | 13.7% | 13.8% |
| Age 35 to 44 | 6.7% | 16.2% | 12.9% |
| Age 45 to 54 | 8.7% | 14.3% | 12.6% |
| Age 55 to 59 | 4.9% | 7.2% | 6.7% |
| Age 60 to 64 | 6.1% | 7.6% | 6.3% |
| Age 65 to 74 | 27.6% | 7.5% | 9.6% |
| Age 75 to 84 | 7.2% | 3.6% | 4.5% |
| Age 85 and over | 2.2% | 2.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Hamlin, PA | Emmaus, PA | United States |
| White | 85.9% | 85.0% | 59.4% |
| Black | 0.0% | 2.5% | 12.2% |
| Asian | 0.0% | 2.8% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 14.1% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 2.2% | 3.2% |
| Hispanic | 0.0% | 7.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Hamlin, PA | Emmaus, PA | United States |
| Married Population | 54.0% | 54.1% | 49.8% |
| Currently Married | 53.4% | 53.2% | 48.0% |
| Married but Separated | 0.5% | 0.9% | 1.8% |
| Single Population | 46.0% | 45.9% | 50.2% |
| Never Married | 29.8% | 31.0% | 33.8% |
| Divorced | 7.2% | 10.6% | 10.8% |
| Widowed | 9.0% | 4.3% | 5.6% |
| space5 | | | |
| Household Size | 2.94 | 2.41 | 2.60 |
| Households | 227 | 4,800 | 124,010,992 |
| Family Households | 139 | 3,240 | 80,755,759 |
| Married couple, w/children | 13.0% | 35.9% | 30.5% |
| Married couple, no children | 61.9% | 39.2% | 42.9% |
| Non Family Households | 88 | 1,560 | 43,255,233 |
| Single householder, w/children | 21.6% | 11.8% | 15.8% |
| Single householder, no children | 3.6% | 13.1% | 10.8% |