| | Arbutus, MD | Perry Hall, MD | United States |
| Population | 19,662 | 29,165 | 329,725,481 |
| Female Population | 47.3% | 50.0% | 50.5% |
| Male Population | 52.7% | 50.0% | 49.5% |
| Median Age | 37.6 | 38.9 | 38.4 |
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| Population - 2010 | 20,406 | 28,368 | 309,327,143 |
| Population - 2000 | 20,116 | 28,705 | 285,036,114 |
| Population - 1990 | 19,750 | 22,723 | 251,960,433 |
| Pop. 2000 to Now | 5.0% | -0.3% | 15.6% |
| Pop. 1990 to Now | 7.0% | 26.0% | 30.8% |
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| Population Density | 3,012.9 | 4,182.6 | 93.4 |
| Land Area | 6.5 | 7.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Arbutus, MD | Perry Hall, MD | United States |
| Age 0 to 4 | 6.5% | 6.7% | 5.9% |
| Age 5 to 9 | 5.1% | 6.5% | 6.1% |
| Age 10 to 14 | 4.6% | 5.1% | 6.6% |
| Age 15 to 17 | 3.3% | 3.2% | 3.9% |
| Age 18 to 20 | 3.0% | 3.2% | 4.0% |
| Age 21 to 24 | 5.2% | 4.6% | 5.2% |
| Age 25 to 34 | 16.7% | 13.9% | 13.8% |
| Age 35 to 44 | 16.3% | 11.2% | 12.9% |
| Age 45 to 54 | 12.1% | 13.4% | 12.6% |
| Age 55 to 59 | 7.1% | 8.8% | 6.7% |
| Age 60 to 64 | 7.3% | 6.5% | 6.3% |
| Age 65 to 74 | 8.3% | 9.0% | 9.6% |
| Age 75 to 84 | 2.9% | 5.4% | 4.5% |
| Age 85 and over | 1.6% | 2.5% | 1.9% |
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| Race | | | |
| | Arbutus, MD | Perry Hall, MD | United States |
| White | 77.1% | 64.1% | 59.4% |
| Black | 8.5% | 16.1% | 12.2% |
| Asian | 6.6% | 13.0% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.3% | 0.0% | 0.4% |
| Two or More Races | 3.4% | 1.5% | 3.2% |
| Hispanic | 4.1% | 5.2% | 18.4% |
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| Marriage & Family | | | |
| | Arbutus, MD | Perry Hall, MD | United States |
| Married Population | 50.9% | 55.5% | 49.8% |
| Currently Married | 49.6% | 54.1% | 48.0% |
| Married but Separated | 1.2% | 1.4% | 1.8% |
| Single Population | 49.1% | 44.5% | 50.2% |
| Never Married | 33.8% | 29.3% | 33.8% |
| Divorced | 10.9% | 9.8% | 10.8% |
| Widowed | 4.4% | 5.5% | 5.6% |
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| Household Size | 2.46 | 2.66 | 2.60 |
| Households | 7,931 | 10,950 | 124,010,992 |
| Family Households | 4,864 | 7,593 | 80,755,759 |
| Married couple, w/children | 30.8% | 32.5% | 30.5% |
| Married couple, no children | 46.9% | 45.3% | 42.9% |
| Non Family Households | 3,067 | 3,357 | 43,255,233 |
| Single householder, w/children | 13.7% | 11.2% | 15.8% |
| Single householder, no children | 8.6% | 11.0% | 10.8% |