| | Cadiz, OH | Pikeville, KY | United States |
| Population | 3,060 | 7,376 | 329,725,481 |
| Female Population | 56.7% | 52.4% | 50.5% |
| Male Population | 43.3% | 47.6% | 49.5% |
| Median Age | 46.2 | 35.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,345 | 7,014 | 309,327,143 |
| Population - 2000 | 3,308 | 6,295 | 285,036,114 |
| Population - 1990 | 3,439 | 6,324 | 251,960,433 |
| Pop. 2000 to Now | -4.7% | 2.2% | 15.6% |
| Pop. 1990 to Now | -8.3% | 1.7% | 30.8% |
| space4 | | | |
| Population Density | 348.4 | 337.4 | 93.4 |
| Land Area | 8.8 | 21.9 | 3,531,905.4 |
| Water Area | 0.2 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Cadiz, OH | Pikeville, KY | United States |
| Age 0 to 4 | 6.7% | 5.0% | 5.9% |
| Age 5 to 9 | 7.0% | 4.5% | 6.1% |
| Age 10 to 14 | 5.8% | 5.7% | 6.6% |
| Age 15 to 17 | 6.2% | 3.3% | 3.9% |
| Age 18 to 20 | 1.1% | 7.1% | 4.0% |
| Age 21 to 24 | 3.6% | 9.3% | 5.2% |
| Age 25 to 34 | 7.5% | 14.3% | 13.8% |
| Age 35 to 44 | 11.1% | 11.3% | 12.9% |
| Age 45 to 54 | 11.2% | 16.0% | 12.6% |
| Age 55 to 59 | 4.1% | 5.8% | 6.7% |
| Age 60 to 64 | 8.6% | 4.7% | 6.3% |
| Age 65 to 74 | 17.5% | 6.7% | 9.6% |
| Age 75 to 84 | 6.5% | 4.1% | 4.5% |
| Age 85 and over | 3.3% | 2.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Cadiz, OH | Pikeville, KY | United States |
| White | 79.9% | 93.1% | 59.4% |
| Black | 14.0% | 2.2% | 12.2% |
| Asian | 0.0% | 2.6% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 5.6% | 1.1% | 3.2% |
| Hispanic | 0.5% | 0.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Cadiz, OH | Pikeville, KY | United States |
| Married Population | 47.3% | 42.5% | 49.8% |
| Currently Married | 47.1% | 39.8% | 48.0% |
| Married but Separated | 0.2% | 2.7% | 1.8% |
| Single Population | 52.7% | 57.5% | 50.2% |
| Never Married | 21.5% | 35.5% | 33.8% |
| Divorced | 14.6% | 16.4% | 10.8% |
| Widowed | 16.5% | 5.5% | 5.6% |
| space5 | | | |
| Household Size | 2.40 | 2.28 | 2.60 |
| Households | 1,237 | 2,873 | 124,010,992 |
| Family Households | 667 | 1,734 | 80,755,759 |
| Married couple, w/children | 33.7% | 24.3% | 30.5% |
| Married couple, no children | 46.9% | 40.9% | 42.9% |
| Non Family Households | 570 | 1,139 | 43,255,233 |
| Single householder, w/children | 17.8% | 13.0% | 15.8% |
| Single householder, no children | 1.5% | 21.7% | 10.8% |