| | Elgin, PA | Chatham, PA | United States |
| Population | 223 | 456 | 329,725,481 |
| Female Population | 42.6% | 48.3% | 50.5% |
| Male Population | 57.4% | 51.8% | 49.5% |
| Median Age | 54.6 | 51.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 218 | 598 | 309,327,143 |
| Population - 2000 | 236 | 587 | 285,036,114 |
| Population - 1990 | 229 | 607 | 251,960,433 |
| Pop. 2000 to Now | -13.6% | -1.5% | 15.6% |
| Pop. 1990 to Now | -10.9% | -4.8% | 30.8% |
| space4 | | | |
| Population Density | 151.3 | 12.9 | 93.4 |
| Land Area | 1.5 | 35.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Elgin, PA | Chatham, PA | United States |
| Age 0 to 4 | 2.2% | 2.2% | 5.9% |
| Age 5 to 9 | 5.4% | 1.8% | 6.1% |
| Age 10 to 14 | 3.6% | 3.1% | 6.6% |
| Age 15 to 17 | 2.2% | 7.0% | 3.9% |
| Age 18 to 20 | 0.9% | 1.5% | 4.0% |
| Age 21 to 24 | 2.2% | 5.0% | 5.2% |
| Age 25 to 34 | 10.8% | 5.9% | 13.8% |
| Age 35 to 44 | 6.7% | 13.4% | 12.9% |
| Age 45 to 54 | 21.5% | 14.9% | 12.6% |
| Age 55 to 59 | 4.5% | 7.0% | 6.7% |
| Age 60 to 64 | 4.0% | 6.6% | 6.3% |
| Age 65 to 74 | 15.2% | 21.9% | 9.6% |
| Age 75 to 84 | 19.7% | 9.0% | 4.5% |
| Age 85 and over | 0.9% | 0.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Elgin, PA | Chatham, PA | United States |
| White | 96.4% | 96.7% | 59.4% |
| Black | 0.9% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 0.4% | 3.2% |
| Hispanic | 2.7% | 2.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Elgin, PA | Chatham, PA | United States |
| Married Population | 70.7% | 68.2% | 49.8% |
| Currently Married | 57.1% | 63.4% | 48.0% |
| Married but Separated | 13.6% | 4.7% | 1.8% |
| Single Population | 29.3% | 31.8% | 50.2% |
| Never Married | 14.6% | 22.2% | 33.8% |
| Divorced | 7.6% | 3.3% | 10.8% |
| Widowed | 7.1% | 6.4% | 5.6% |
| space5 | | | |
| Household Size | 2.90 | 2.16 | 2.60 |
| Households | 77 | 211 | 124,010,992 |
| Family Households | 62 | 135 | 80,755,759 |
| Married couple, w/children | 19.4% | 25.9% | 30.5% |
| Married couple, no children | 66.1% | 71.9% | 42.9% |
| Non Family Households | 15 | 76 | 43,255,233 |
| Single householder, w/children | 9.7% | 0.0% | 15.8% |
| Single householder, no children | 4.8% | 2.2% | 10.8% |