| | Moraine, OH | Mason, MI | United States |
| Population | 6,413 | 8,307 | 329,725,481 |
| Female Population | 52.8% | 50.7% | 50.5% |
| Male Population | 47.2% | 49.3% | 49.5% |
| Median Age | 35.3 | 39.7 | 38.4 |
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| Population - 2010 | 6,402 | 8,263 | 309,327,143 |
| Population - 2000 | 6,897 | 6,714 | 285,036,114 |
| Population - 1990 | 5,989 | 6,768 | 251,960,433 |
| Pop. 2000 to Now | -5.7% | 25.0% | 15.6% |
| Pop. 1990 to Now | 8.7% | 24.0% | 30.8% |
| space4 | | | |
| Population Density | 693.2 | 1,630.1 | 93.4 |
| Land Area | 9.3 | 5.1 | 3,531,905.4 |
| Water Area | 0.3 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Moraine, OH | Mason, MI | United States |
| Age 0 to 4 | 6.5% | 5.2% | 5.9% |
| Age 5 to 9 | 9.7% | 5.0% | 6.1% |
| Age 10 to 14 | 6.7% | 7.4% | 6.6% |
| Age 15 to 17 | 6.4% | 3.7% | 3.9% |
| Age 18 to 20 | 2.3% | 2.9% | 4.0% |
| Age 21 to 24 | 4.3% | 4.8% | 5.2% |
| Age 25 to 34 | 13.7% | 13.9% | 13.8% |
| Age 35 to 44 | 13.6% | 15.1% | 12.9% |
| Age 45 to 54 | 8.0% | 11.0% | 12.6% |
| Age 55 to 59 | 8.5% | 6.5% | 6.7% |
| Age 60 to 64 | 5.8% | 7.4% | 6.3% |
| Age 65 to 74 | 8.0% | 10.4% | 9.6% |
| Age 75 to 84 | 3.7% | 4.4% | 4.5% |
| Age 85 and over | 2.7% | 2.4% | 1.9% |
| space1 | | | |
| Race | | | |
| | Moraine, OH | Mason, MI | United States |
| White | 75.7% | 87.8% | 59.4% |
| Black | 11.8% | 4.1% | 12.2% |
| Asian | 1.8% | 2.5% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 3.2% | 2.6% | 3.2% |
| Hispanic | 7.5% | 2.9% | 18.4% |
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| Marriage & Family | | | |
| | Moraine, OH | Mason, MI | United States |
| Married Population | 43.1% | 48.1% | 49.8% |
| Currently Married | 41.8% | 47.4% | 48.0% |
| Married but Separated | 1.3% | 0.7% | 1.8% |
| Single Population | 56.9% | 51.9% | 50.2% |
| Never Married | 37.3% | 30.8% | 33.8% |
| Divorced | 11.8% | 15.0% | 10.8% |
| Widowed | 7.7% | 6.0% | 5.6% |
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| Household Size | 2.56 | 2.28 | 2.60 |
| Households | 2,466 | 3,438 | 124,010,992 |
| Family Households | 1,546 | 2,108 | 80,755,759 |
| Married couple, w/children | 26.3% | 33.0% | 30.5% |
| Married couple, no children | 35.9% | 41.5% | 42.9% |
| Non Family Households | 920 | 1,330 | 43,255,233 |
| Single householder, w/children | 25.2% | 12.9% | 15.8% |
| Single householder, no children | 12.6% | 12.6% | 10.8% |