| | Monroeville, PA | Laurel, MD | United States |
| Population | 28,607 | 29,438 | 329,725,481 |
| Female Population | 53.0% | 53.2% | 50.5% |
| Male Population | 47.0% | 46.8% | 49.5% |
| Median Age | 45.3 | 35.6 | 38.4 |
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| Population - 2010 | 28,351 | 24,994 | 309,327,143 |
| Population - 2000 | 29,496 | 19,960 | 285,036,114 |
| Population - 1990 | 29,322 | 19,438 | 251,960,433 |
| Pop. 2000 to Now | -7.1% | 28.0% | 15.6% |
| Pop. 1990 to Now | -6.6% | 31.4% | 30.8% |
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| Population Density | 1,451.0 | 6,113.8 | 93.4 |
| Land Area | 19.7 | 4.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Monroeville, PA | Laurel, MD | United States |
| Age 0 to 4 | 5.3% | 7.3% | 5.9% |
| Age 5 to 9 | 4.8% | 5.3% | 6.1% |
| Age 10 to 14 | 4.5% | 8.4% | 6.6% |
| Age 15 to 17 | 3.7% | 2.8% | 3.9% |
| Age 18 to 20 | 2.6% | 2.6% | 4.0% |
| Age 21 to 24 | 4.4% | 5.6% | 5.2% |
| Age 25 to 34 | 12.1% | 17.4% | 13.8% |
| Age 35 to 44 | 12.2% | 14.7% | 12.9% |
| Age 45 to 54 | 13.6% | 14.1% | 12.6% |
| Age 55 to 59 | 7.4% | 5.7% | 6.7% |
| Age 60 to 64 | 7.3% | 5.6% | 6.3% |
| Age 65 to 74 | 13.0% | 6.8% | 9.6% |
| Age 75 to 84 | 5.8% | 2.9% | 4.5% |
| Age 85 and over | 3.1% | 0.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Monroeville, PA | Laurel, MD | United States |
| White | 73.7% | 17.5% | 59.4% |
| Black | 13.1% | 50.1% | 12.2% |
| Asian | 6.9% | 9.4% | 5.6% |
| Native American | 0.1% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.4% | 0.1% | 0.4% |
| Two or More Races | 4.5% | 4.4% | 3.2% |
| Hispanic | 1.3% | 18.3% | 18.4% |
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| Marriage & Family | | | |
| | Monroeville, PA | Laurel, MD | United States |
| Married Population | 54.3% | 43.7% | 49.8% |
| Currently Married | 52.8% | 40.2% | 48.0% |
| Married but Separated | 1.6% | 3.5% | 1.8% |
| Single Population | 45.7% | 56.3% | 50.2% |
| Never Married | 28.1% | 42.1% | 33.8% |
| Divorced | 10.0% | 10.6% | 10.8% |
| Widowed | 7.6% | 3.6% | 5.6% |
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| Household Size | 2.28 | 2.63 | 2.60 |
| Households | 12,332 | 11,142 | 124,010,992 |
| Family Households | 7,830 | 6,305 | 80,755,759 |
| Married couple, w/children | 28.3% | 32.7% | 30.5% |
| Married couple, no children | 49.7% | 30.2% | 42.9% |
| Non Family Households | 4,502 | 4,837 | 43,255,233 |
| Single householder, w/children | 10.2% | 22.1% | 15.8% |
| Single householder, no children | 11.8% | 15.1% | 10.8% |