| | Mount Gilead, OH | Hilliard, OH | United States |
| Population | 3,108 | 35,530 | 329,725,481 |
| Female Population | 57.3% | 51.1% | 50.5% |
| Male Population | 42.7% | 48.9% | 49.5% |
| Median Age | 33.9 | 36.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,652 | 28,331 | 309,327,143 |
| Population - 2000 | 3,290 | 24,230 | 285,036,114 |
| Population - 1990 | 2,846 | 11,796 | 251,960,433 |
| Pop. 2000 to Now | 12.1% | 51.9% | 15.6% |
| Pop. 1990 to Now | 29.6% | 211.9% | 30.8% |
| space4 | | | |
| Population Density | 917.6 | 2,490.4 | 93.4 |
| Land Area | 3.4 | 14.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Mount Gilead, OH | Hilliard, OH | United States |
| Age 0 to 4 | 7.5% | 5.8% | 5.9% |
| Age 5 to 9 | 8.8% | 6.8% | 6.1% |
| Age 10 to 14 | 10.4% | 8.2% | 6.6% |
| Age 15 to 17 | 3.1% | 5.3% | 3.9% |
| Age 18 to 20 | 4.3% | 2.3% | 4.0% |
| Age 21 to 24 | 3.4% | 4.5% | 5.2% |
| Age 25 to 34 | 14.3% | 15.0% | 13.8% |
| Age 35 to 44 | 12.3% | 14.8% | 12.9% |
| Age 45 to 54 | 11.8% | 14.0% | 12.6% |
| Age 55 to 59 | 3.1% | 6.3% | 6.7% |
| Age 60 to 64 | 1.6% | 6.5% | 6.3% |
| Age 65 to 74 | 7.6% | 6.5% | 9.6% |
| Age 75 to 84 | 9.1% | 3.0% | 4.5% |
| Age 85 and over | 2.8% | 1.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Mount Gilead, OH | Hilliard, OH | United States |
| White | 83.9% | 81.3% | 59.4% |
| Black | 4.5% | 4.4% | 12.2% |
| Asian | 0.0% | 5.8% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.3% | 0.4% |
| Two or More Races | 0.5% | 4.0% | 3.2% |
| Hispanic | 11.1% | 4.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Mount Gilead, OH | Hilliard, OH | United States |
| Married Population | 41.9% | 62.5% | 49.8% |
| Currently Married | 36.0% | 61.8% | 48.0% |
| Married but Separated | 5.9% | 0.6% | 1.8% |
| Single Population | 58.1% | 37.5% | 50.2% |
| Never Married | 22.8% | 26.3% | 33.8% |
| Divorced | 15.6% | 7.8% | 10.8% |
| Widowed | 19.7% | 3.4% | 5.6% |
| space5 | | | |
| Household Size | 2.61 | 2.57 | 2.60 |
| Households | 1,148 | 13,782 | 124,010,992 |
| Family Households | 679 | 10,116 | 80,755,759 |
| Married couple, w/children | 28.1% | 38.5% | 30.5% |
| Married couple, no children | 23.9% | 44.5% | 42.9% |
| Non Family Households | 469 | 3,666 | 43,255,233 |
| Single householder, w/children | 33.3% | 11.1% | 15.8% |
| Single householder, no children | 14.7% | 5.8% | 10.8% |