| | Summerhill township, PA | Elberta, AL | United States |
| Population | 1,868 | 2,302 | 329,725,481 |
| Female Population | 54.7% | 47.2% | 50.5% |
| Male Population | 45.3% | 52.8% | 49.5% |
| Median Age | 51.1 | 47.2 | 38.4 |
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| Population - 2010 | 2,465 | 1,497 | 309,327,143 |
| Population - 2000 | 2,724 | 552 | 285,036,114 |
| Population - 1990 | 2,798 | 458 | 251,960,433 |
| Pop. 2000 to Now | -18.0% | 217.6% | 15.6% |
| Pop. 1990 to Now | -20.2% | 282.8% | 30.8% |
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| Population Density | 64.6 | 334.5 | 93.4 |
| Land Area | 28.9 | 6.9 | 3,531,905.4 |
| Water Area | 0.7 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Summerhill township, PA | Elberta, AL | United States |
| Age 0 to 4 | 3.1% | 8.3% | 5.9% |
| Age 5 to 9 | 6.6% | 4.2% | 6.1% |
| Age 10 to 14 | 5.5% | 3.1% | 6.6% |
| Age 15 to 17 | 2.2% | 1.4% | 3.9% |
| Age 18 to 20 | 3.3% | 4.4% | 4.0% |
| Age 21 to 24 | 2.8% | 5.3% | 5.2% |
| Age 25 to 34 | 6.4% | 13.7% | 13.8% |
| Age 35 to 44 | 11.9% | 7.2% | 12.9% |
| Age 45 to 54 | 16.3% | 14.0% | 12.6% |
| Age 55 to 59 | 8.0% | 6.2% | 6.7% |
| Age 60 to 64 | 8.9% | 11.5% | 6.3% |
| Age 65 to 74 | 13.5% | 11.3% | 9.6% |
| Age 75 to 84 | 9.4% | 8.7% | 4.5% |
| Age 85 and over | 2.1% | 0.6% | 1.9% |
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| Race | | | |
| | Summerhill township, PA | Elberta, AL | United States |
| White | 96.3% | 89.7% | 59.4% |
| Black | 0.5% | 0.6% | 12.2% |
| Asian | 1.2% | 0.0% | 5.6% |
| Native American | 0.0% | 0.7% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 1.3% | 0.0% | 0.4% |
| Two or More Races | 0.2% | 4.3% | 3.2% |
| Hispanic | 0.5% | 4.7% | 18.4% |
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| Marriage & Family | | | |
| | Summerhill township, PA | Elberta, AL | United States |
| Married Population | 56.2% | 38.9% | 49.8% |
| Currently Married | 54.9% | 38.0% | 48.0% |
| Married but Separated | 1.3% | 0.9% | 1.8% |
| Single Population | 43.8% | 61.1% | 50.2% |
| Never Married | 24.4% | 38.8% | 33.8% |
| Divorced | 11.4% | 13.9% | 10.8% |
| Widowed | 8.0% | 8.4% | 5.6% |
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| Household Size | 2.35 | 2.42 | 2.60 |
| Households | 792 | 953 | 124,010,992 |
| Family Households | 510 | 470 | 80,755,759 |
| Married couple, w/children | 21.0% | 28.5% | 30.5% |
| Married couple, no children | 57.8% | 40.6% | 42.9% |
| Non Family Households | 282 | 483 | 43,255,233 |
| Single householder, w/children | 11.0% | 11.9% | 15.8% |
| Single householder, no children | 10.2% | 18.9% | 10.8% |