| | Manchester, OH | West Union, OH | United States |
| Population | 1,622 | 3,132 | 329,725,481 |
| Female Population | 52.9% | 47.5% | 50.5% |
| Male Population | 47.1% | 52.5% | 49.5% |
| Median Age | 42.4 | 44.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,028 | 3,247 | 309,327,143 |
| Population - 2000 | 2,043 | 2,903 | 285,036,114 |
| Population - 1990 | 2,223 | 3,096 | 251,960,433 |
| Pop. 2000 to Now | -4.2% | 8.4% | 15.6% |
| Pop. 1990 to Now | -11.9% | 1.7% | 30.8% |
| space4 | | | |
| Population Density | 1,264.2 | 1,106.3 | 93.4 |
| Land Area | 1.3 | 2.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Manchester, OH | West Union, OH | United States |
| Age 0 to 4 | 6.8% | 6.5% | 5.9% |
| Age 5 to 9 | 7.7% | 4.7% | 6.1% |
| Age 10 to 14 | 3.3% | 7.8% | 6.6% |
| Age 15 to 17 | 3.4% | 6.0% | 3.9% |
| Age 18 to 20 | 3.1% | 1.4% | 4.0% |
| Age 21 to 24 | 4.2% | 1.9% | 5.2% |
| Age 25 to 34 | 15.8% | 10.7% | 13.8% |
| Age 35 to 44 | 8.5% | 11.6% | 12.9% |
| Age 45 to 54 | 8.8% | 11.0% | 12.6% |
| Age 55 to 59 | 4.3% | 6.5% | 6.7% |
| Age 60 to 64 | 7.2% | 11.0% | 6.3% |
| Age 65 to 74 | 19.8% | 8.6% | 9.6% |
| Age 75 to 84 | 5.0% | 9.2% | 4.5% |
| Age 85 and over | 2.2% | 3.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Manchester, OH | West Union, OH | United States |
| White | 96.6% | 97.0% | 59.4% |
| Black | 0.0% | 0.2% | 12.2% |
| Asian | 0.1% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.9% | 1.8% | 3.2% |
| Hispanic | 1.5% | 1.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Manchester, OH | West Union, OH | United States |
| Married Population | 54.4% | 36.9% | 49.8% |
| Currently Married | 49.3% | 34.1% | 48.0% |
| Married but Separated | 5.1% | 2.8% | 1.8% |
| Single Population | 45.6% | 63.1% | 50.2% |
| Never Married | 20.6% | 25.0% | 33.8% |
| Divorced | 17.1% | 25.4% | 10.8% |
| Widowed | 8.0% | 12.7% | 5.6% |
| space5 | | | |
| Household Size | 2.36 | 2.30 | 2.60 |
| Households | 687 | 1,266 | 124,010,992 |
| Family Households | 425 | 664 | 80,755,759 |
| Married couple, w/children | 25.2% | 24.4% | 30.5% |
| Married couple, no children | 45.2% | 41.1% | 42.9% |
| Non Family Households | 262 | 602 | 43,255,233 |
| Single householder, w/children | 17.9% | 28.3% | 15.8% |
| Single householder, no children | 11.8% | 6.2% | 10.8% |