| | Mount Vernon, KY | Manchester, KY | United States |
| Population | 2,178 | 2,439 | 329,725,481 |
| Female Population | 56.2% | 44.1% | 50.5% |
| Male Population | 43.8% | 55.9% | 49.5% |
| Median Age | 43.9 | 35.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,465 | 1,445 | 309,327,143 |
| Population - 2000 | 2,592 | 1,738 | 285,036,114 |
| Population - 1990 | 2,654 | 1,634 | 251,960,433 |
| Pop. 2000 to Now | -8.4% | -26.5% | 15.6% |
| Pop. 1990 to Now | -10.5% | -21.9% | 30.8% |
| space4 | | | |
| Population Density | 1,059.3 | 868.3 | 93.4 |
| Land Area | 2.1 | 2.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Mount Vernon, KY | Manchester, KY | United States |
| Age 0 to 4 | 6.3% | 7.9% | 5.9% |
| Age 5 to 9 | 4.6% | 4.2% | 6.1% |
| Age 10 to 14 | 5.7% | 6.9% | 6.6% |
| Age 15 to 17 | 4.6% | 1.1% | 3.9% |
| Age 18 to 20 | 4.6% | 2.7% | 4.0% |
| Age 21 to 24 | 2.1% | 4.2% | 5.2% |
| Age 25 to 34 | 11.2% | 22.8% | 13.8% |
| Age 35 to 44 | 11.3% | 13.9% | 12.9% |
| Age 45 to 54 | 11.4% | 8.8% | 12.6% |
| Age 55 to 59 | 9.1% | 1.7% | 6.7% |
| Age 60 to 64 | 7.4% | 7.4% | 6.3% |
| Age 65 to 74 | 12.5% | 15.4% | 9.6% |
| Age 75 to 84 | 6.6% | 1.8% | 4.5% |
| Age 85 and over | 2.5% | 1.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Mount Vernon, KY | Manchester, KY | United States |
| White | 90.5% | 65.4% | 59.4% |
| Black | 0.5% | 25.2% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.3% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 0.0% | 1.5% | 0.4% |
| Two or More Races | 8.7% | 6.5% | 3.2% |
| Hispanic | 0.0% | 1.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Mount Vernon, KY | Manchester, KY | United States |
| Married Population | 47.4% | 39.6% | 49.8% |
| Currently Married | 43.5% | 36.3% | 48.0% |
| Married but Separated | 3.9% | 3.3% | 1.8% |
| Single Population | 52.6% | 60.4% | 50.2% |
| Never Married | 25.1% | 35.0% | 33.8% |
| Divorced | 17.5% | 17.2% | 10.8% |
| Widowed | 10.0% | 8.2% | 5.6% |
| space5 | | | |
| Household Size | 2.44 | 2.98 | 2.60 |
| Households | 810 | 818 | 124,010,992 |
| Family Households | 500 | 545 | 80,755,759 |
| Married couple, w/children | 13.4% | 27.7% | 30.5% |
| Married couple, no children | 42.2% | 31.9% | 42.9% |
| Non Family Households | 310 | 273 | 43,255,233 |
| Single householder, w/children | 32.8% | 19.6% | 15.8% |
| Single householder, no children | 11.6% | 20.7% | 10.8% |