| | Upper Arlington, OH | Potomac, MD | United States |
| Population | 36,566 | 46,891 | 329,725,481 |
| Female Population | 50.1% | 51.7% | 50.5% |
| Male Population | 49.9% | 48.3% | 49.5% |
| Median Age | 39.4 | 46.6 | 38.4 |
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| Population - 2010 | 33,708 | 44,785 | 309,327,143 |
| Population - 2000 | 33,686 | 44,822 | 285,036,114 |
| Population - 1990 | 34,128 | 45,634 | 251,960,433 |
| Pop. 2000 to Now | 5.0% | 4.0% | 15.6% |
| Pop. 1990 to Now | 3.6% | 2.1% | 30.8% |
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| Population Density | 3,734.7 | 1,865.7 | 93.4 |
| Land Area | 9.8 | 25.1 | 3,531,905.4 |
| Water Area | 0.0 | 1.5 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Upper Arlington, OH | Potomac, MD | United States |
| Age 0 to 4 | 8.4% | 4.5% | 5.9% |
| Age 5 to 9 | 7.4% | 5.9% | 6.1% |
| Age 10 to 14 | 7.9% | 8.1% | 6.6% |
| Age 15 to 17 | 4.3% | 6.2% | 3.9% |
| Age 18 to 20 | 1.8% | 3.3% | 4.0% |
| Age 21 to 24 | 1.8% | 3.1% | 5.2% |
| Age 25 to 34 | 10.8% | 5.6% | 13.8% |
| Age 35 to 44 | 15.5% | 10.9% | 12.9% |
| Age 45 to 54 | 13.8% | 15.7% | 12.6% |
| Age 55 to 59 | 5.8% | 7.8% | 6.7% |
| Age 60 to 64 | 6.0% | 7.1% | 6.3% |
| Age 65 to 74 | 9.5% | 11.8% | 9.6% |
| Age 75 to 84 | 4.0% | 7.3% | 4.5% |
| Age 85 and over | 2.9% | 2.7% | 1.9% |
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| Race | | | |
| | Upper Arlington, OH | Potomac, MD | United States |
| White | 84.9% | 59.8% | 59.4% |
| Black | 0.6% | 5.8% | 12.2% |
| Asian | 7.9% | 20.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.0% | 0.6% | 0.4% |
| Two or More Races | 3.6% | 2.9% | 3.2% |
| Hispanic | 3.0% | 10.7% | 18.4% |
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| Marriage & Family | | | |
| | Upper Arlington, OH | Potomac, MD | United States |
| Married Population | 64.1% | 66.1% | 49.8% |
| Currently Married | 63.4% | 65.2% | 48.0% |
| Married but Separated | 0.7% | 0.8% | 1.8% |
| Single Population | 35.9% | 34.0% | 50.2% |
| Never Married | 21.9% | 23.2% | 33.8% |
| Divorced | 7.9% | 5.5% | 10.8% |
| Widowed | 6.1% | 5.3% | 5.6% |
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| Household Size | 2.56 | 2.82 | 2.60 |
| Households | 14,213 | 16,514 | 124,010,992 |
| Family Households | 9,983 | 13,115 | 80,755,759 |
| Married couple, w/children | 45.4% | 41.0% | 30.5% |
| Married couple, no children | 41.2% | 46.5% | 42.9% |
| Non Family Households | 4,230 | 3,399 | 43,255,233 |
| Single householder, w/children | 8.3% | 6.1% | 15.8% |
| Single householder, no children | 5.1% | 6.4% | 10.8% |