| | McConnelsville, OH | Parkersburg, WV | United States |
| Population | 2,282 | 29,910 | 329,725,481 |
| Female Population | 52.3% | 50.2% | 50.5% |
| Male Population | 47.7% | 49.8% | 49.5% |
| Median Age | 39.5 | 42.3 | 38.4 |
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| Population - 2010 | 1,777 | 31,263 | 309,327,143 |
| Population - 2000 | 1,676 | 33,099 | 285,036,114 |
| Population - 1990 | 1,804 | 33,862 | 251,960,433 |
| Pop. 2000 to Now | 2.6% | -12.4% | 15.6% |
| Pop. 1990 to Now | -4.7% | -14.3% | 30.8% |
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| Population Density | 1,272.7 | 2,541.2 | 93.4 |
| Land Area | 1.8 | 11.8 | 3,531,905.4 |
| Water Area | 0.1 | 0.5 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | McConnelsville, OH | Parkersburg, WV | United States |
| Age 0 to 4 | 2.3% | 5.4% | 5.9% |
| Age 5 to 9 | 4.9% | 5.6% | 6.1% |
| Age 10 to 14 | 15.2% | 6.1% | 6.6% |
| Age 15 to 17 | 4.2% | 3.8% | 3.9% |
| Age 18 to 20 | 3.2% | 2.9% | 4.0% |
| Age 21 to 24 | 2.9% | 4.6% | 5.2% |
| Age 25 to 34 | 11.0% | 12.6% | 13.8% |
| Age 35 to 44 | 14.8% | 11.9% | 12.9% |
| Age 45 to 54 | 7.0% | 12.1% | 12.6% |
| Age 55 to 59 | 5.3% | 6.9% | 6.7% |
| Age 60 to 64 | 12.3% | 7.1% | 6.3% |
| Age 65 to 74 | 7.4% | 12.9% | 9.6% |
| Age 75 to 84 | 7.5% | 5.3% | 4.5% |
| Age 85 and over | 2.2% | 2.9% | 1.9% |
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| Race | | | |
| | McConnelsville, OH | Parkersburg, WV | United States |
| White | 88.9% | 93.5% | 59.4% |
| Black | 3.6% | 2.3% | 12.2% |
| Asian | 0.5% | 0.3% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.3% | 0.2% |
| Other | 2.5% | 0.0% | 0.4% |
| Two or More Races | 3.4% | 2.8% | 3.2% |
| Hispanic | 1.1% | 0.7% | 18.4% |
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| Marriage & Family | | | |
| | McConnelsville, OH | Parkersburg, WV | United States |
| Married Population | 38.0% | 43.2% | 49.8% |
| Currently Married | 36.7% | 41.0% | 48.0% |
| Married but Separated | 1.2% | 2.2% | 1.8% |
| Single Population | 62.0% | 56.8% | 50.2% |
| Never Married | 25.6% | 28.7% | 33.8% |
| Divorced | 24.3% | 18.2% | 10.8% |
| Widowed | 12.1% | 9.9% | 5.6% |
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| Household Size | 2.48 | 2.21 | 2.60 |
| Households | 878 | 13,359 | 124,010,992 |
| Family Households | 494 | 7,173 | 80,755,759 |
| Married couple, w/children | 35.0% | 21.9% | 30.5% |
| Married couple, no children | 25.7% | 45.1% | 42.9% |
| Non Family Households | 384 | 6,186 | 43,255,233 |
| Single householder, w/children | 24.1% | 20.3% | 15.8% |
| Single householder, no children | 15.2% | 12.6% | 10.8% |