| | Mount Gilead, OH | Adrian, MI | United States |
| Population | 3,108 | 20,674 | 329,725,481 |
| Female Population | 57.3% | 53.1% | 50.5% |
| Male Population | 42.7% | 46.9% | 49.5% |
| Median Age | 33.9 | 34.8 | 38.4 |
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| Population - 2010 | 3,652 | 21,153 | 309,327,143 |
| Population - 2000 | 3,290 | 21,574 | 285,036,114 |
| Population - 1990 | 2,846 | 22,097 | 251,960,433 |
| Pop. 2000 to Now | 12.1% | -5.3% | 15.6% |
| Pop. 1990 to Now | 29.6% | -7.5% | 30.8% |
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| Population Density | 917.6 | 2,585.2 | 93.4 |
| Land Area | 3.4 | 8.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Mount Gilead, OH | Adrian, MI | United States |
| Age 0 to 4 | 7.5% | 5.6% | 5.9% |
| Age 5 to 9 | 8.8% | 5.4% | 6.1% |
| Age 10 to 14 | 10.4% | 6.1% | 6.6% |
| Age 15 to 17 | 3.1% | 2.4% | 3.9% |
| Age 18 to 20 | 4.3% | 9.4% | 4.0% |
| Age 21 to 24 | 3.4% | 9.1% | 5.2% |
| Age 25 to 34 | 14.3% | 12.4% | 13.8% |
| Age 35 to 44 | 12.3% | 10.5% | 12.9% |
| Age 45 to 54 | 11.8% | 10.9% | 12.6% |
| Age 55 to 59 | 3.1% | 5.0% | 6.7% |
| Age 60 to 64 | 1.6% | 5.5% | 6.3% |
| Age 65 to 74 | 7.6% | 9.5% | 9.6% |
| Age 75 to 84 | 9.1% | 4.7% | 4.5% |
| Age 85 and over | 2.8% | 3.5% | 1.9% |
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| Race | | | |
| | Mount Gilead, OH | Adrian, MI | United States |
| White | 83.9% | 71.3% | 59.4% |
| Black | 4.5% | 3.3% | 12.2% |
| Asian | 0.0% | 0.2% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.0% | 0.3% | 0.4% |
| Two or More Races | 0.5% | 3.3% | 3.2% |
| Hispanic | 11.1% | 21.5% | 18.4% |
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| Marriage & Family | | | |
| | Mount Gilead, OH | Adrian, MI | United States |
| Married Population | 41.9% | 34.0% | 49.8% |
| Currently Married | 36.0% | 31.9% | 48.0% |
| Married but Separated | 5.9% | 2.1% | 1.8% |
| Single Population | 58.1% | 66.0% | 50.2% |
| Never Married | 22.8% | 44.6% | 33.8% |
| Divorced | 15.6% | 14.7% | 10.8% |
| Widowed | 19.7% | 6.7% | 5.6% |
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| Household Size | 2.61 | 2.26 | 2.60 |
| Households | 1,148 | 8,072 | 124,010,992 |
| Family Households | 679 | 4,257 | 80,755,759 |
| Married couple, w/children | 28.1% | 22.7% | 30.5% |
| Married couple, no children | 23.9% | 35.5% | 42.9% |
| Non Family Households | 469 | 3,815 | 43,255,233 |
| Single householder, w/children | 33.3% | 32.4% | 15.8% |
| Single householder, no children | 14.7% | 9.4% | 10.8% |