| | Moreland Hills, OH | Rosaryville, MD | United States |
| Population | 3,436 | 11,881 | 329,725,481 |
| Female Population | 49.3% | 54.7% | 50.5% |
| Male Population | 50.7% | 45.3% | 49.5% |
| Median Age | 55.2 | 48.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,321 | 11,479 | 309,327,143 |
| Population - 2000 | 3,298 | 12,322 | 285,036,114 |
| Population - 1990 | 3,354 | 8,976 | 251,960,433 |
| Pop. 2000 to Now | 0.1% | -11.7% | 15.6% |
| Pop. 1990 to Now | -1.6% | 21.2% | 30.8% |
| space4 | | | |
| Population Density | 480.9 | 1,293.4 | 93.4 |
| Land Area | 7.1 | 9.2 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Moreland Hills, OH | Rosaryville, MD | United States |
| Age 0 to 4 | 2.1% | 6.0% | 5.9% |
| Age 5 to 9 | 5.7% | 3.2% | 6.1% |
| Age 10 to 14 | 5.6% | 3.8% | 6.6% |
| Age 15 to 17 | 3.3% | 4.2% | 3.9% |
| Age 18 to 20 | 0.7% | 3.4% | 4.0% |
| Age 21 to 24 | 0.6% | 5.5% | 5.2% |
| Age 25 to 34 | 5.4% | 8.5% | 13.8% |
| Age 35 to 44 | 9.3% | 10.1% | 12.9% |
| Age 45 to 54 | 17.1% | 16.5% | 12.6% |
| Age 55 to 59 | 9.2% | 9.0% | 6.7% |
| Age 60 to 64 | 10.6% | 9.0% | 6.3% |
| Age 65 to 74 | 19.1% | 15.6% | 9.6% |
| Age 75 to 84 | 8.8% | 4.2% | 4.5% |
| Age 85 and over | 2.6% | 1.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Moreland Hills, OH | Rosaryville, MD | United States |
| White | 91.2% | 7.7% | 59.4% |
| Black | 1.0% | 83.7% | 12.2% |
| Asian | 5.9% | 1.3% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 3.1% | 0.4% |
| Two or More Races | 1.4% | 1.8% | 3.2% |
| Hispanic | 0.4% | 2.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Moreland Hills, OH | Rosaryville, MD | United States |
| Married Population | 71.9% | 52.2% | 49.8% |
| Currently Married | 70.8% | 50.5% | 48.0% |
| Married but Separated | 1.1% | 1.7% | 1.8% |
| Single Population | 28.1% | 47.8% | 50.2% |
| Never Married | 16.2% | 32.9% | 33.8% |
| Divorced | 8.2% | 11.4% | 10.8% |
| Widowed | 3.6% | 3.5% | 5.6% |
| space5 | | | |
| Household Size | 2.36 | 3.18 | 2.60 |
| Households | 1,450 | 3,707 | 124,010,992 |
| Family Households | 1,104 | 3,020 | 80,755,759 |
| Married couple, w/children | 25.5% | 27.0% | 30.5% |
| Married couple, no children | 65.7% | 50.9% | 42.9% |
| Non Family Households | 346 | 687 | 43,255,233 |
| Single householder, w/children | 3.3% | 7.8% | 15.8% |
| Single householder, no children | 5.6% | 14.3% | 10.8% |