| | Allison Park, PA | Beachwood, OH | United States |
| Population | 23,160 | 13,806 | 329,725,481 |
| Female Population | 51.2% | 55.2% | 50.5% |
| Male Population | 48.8% | 44.8% | 49.5% |
| Median Age | 43.9 | 49.2 | 38.4 |
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| Population - 2010 | 22,293 | 11,916 | 309,327,143 |
| Population - 2000 | 20,847 | 12,186 | 285,036,114 |
| Population - 1990 | 20,294 | 10,677 | 251,960,433 |
| Pop. 2000 to Now | 4.2% | -5.3% | 15.6% |
| Pop. 1990 to Now | 7.0% | 8.1% | 30.8% |
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| Population Density | 1,672.9 | 2,625.2 | 93.4 |
| Land Area | 13.8 | 5.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Allison Park, PA | Beachwood, OH | United States |
| Age 0 to 4 | 6.2% | 6.2% | 5.9% |
| Age 5 to 9 | 4.3% | 4.9% | 6.1% |
| Age 10 to 14 | 6.3% | 4.5% | 6.6% |
| Age 15 to 17 | 3.5% | 4.1% | 3.9% |
| Age 18 to 20 | 3.9% | 2.1% | 4.0% |
| Age 21 to 24 | 3.6% | 2.7% | 5.2% |
| Age 25 to 34 | 12.4% | 8.6% | 13.8% |
| Age 35 to 44 | 12.2% | 12.7% | 12.9% |
| Age 45 to 54 | 13.1% | 11.4% | 12.6% |
| Age 55 to 59 | 7.4% | 5.6% | 6.7% |
| Age 60 to 64 | 7.5% | 9.3% | 6.3% |
| Age 65 to 74 | 11.5% | 12.3% | 9.6% |
| Age 75 to 84 | 5.7% | 8.3% | 4.5% |
| Age 85 and over | 2.3% | 7.4% | 1.9% |
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| Race | | | |
| | Allison Park, PA | Beachwood, OH | United States |
| White | 89.5% | 74.9% | 59.4% |
| Black | 2.9% | 9.0% | 12.2% |
| Asian | 3.3% | 10.5% | 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 | 2.1% | 2.0% | 3.2% |
| Hispanic | 2.1% | 3.5% | 18.4% |
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| Marriage & Family | | | |
| | Allison Park, PA | Beachwood, OH | United States |
| Married Population | 59.9% | 57.8% | 49.8% |
| Currently Married | 58.2% | 57.0% | 48.0% |
| Married but Separated | 1.8% | 0.8% | 1.8% |
| Single Population | 40.1% | 42.2% | 50.2% |
| Never Married | 28.8% | 23.0% | 33.8% |
| Divorced | 6.5% | 7.4% | 10.8% |
| Widowed | 4.7% | 11.9% | 5.6% |
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| Household Size | 2.41 | 2.33 | 2.60 |
| Households | 9,350 | 5,644 | 124,010,992 |
| Family Households | 6,222 | 3,519 | 80,755,759 |
| Married couple, w/children | 33.6% | 32.6% | 30.5% |
| Married couple, no children | 52.7% | 55.0% | 42.9% |
| Non Family Households | 3,128 | 2,125 | 43,255,233 |
| Single householder, w/children | 8.1% | 8.0% | 15.8% |
| Single householder, no children | 5.6% | 4.3% | 10.8% |