| | Caldwell, OH | Waterford, OH | United States |
| Population | 2,235 | 389 | 329,725,481 |
| Female Population | 52.3% | 47.0% | 50.5% |
| Male Population | 47.7% | 53.0% | 49.5% |
| Median Age | 51.3 | 48.1 | 38.4 |
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| Population - 2010 | 1,694 | 403 | 309,327,143 |
| Population - 2000 | 1,956 | 430 | 285,036,114 |
| Population - 1990 | 1,786 | 346 | 251,960,433 |
| Pop. 2000 to Now | -16.2% | 13.5% | 15.6% |
| Pop. 1990 to Now | -8.2% | 41.0% | 30.8% |
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| Population Density | 2,514.1 | 825.9 | 93.4 |
| Land Area | 0.9 | 0.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Caldwell, OH | Waterford, OH | United States |
| Age 0 to 4 | 7.7% | 0.0% | 5.9% |
| Age 5 to 9 | 8.7% | 0.0% | 6.1% |
| Age 10 to 14 | 8.6% | 22.1% | 6.6% |
| Age 15 to 17 | 1.8% | 10.0% | 3.9% |
| Age 18 to 20 | 0.0% | 2.3% | 4.0% |
| Age 21 to 24 | 4.3% | 0.0% | 5.2% |
| Age 25 to 34 | 8.6% | 0.0% | 13.8% |
| Age 35 to 44 | 7.2% | 13.9% | 12.9% |
| Age 45 to 54 | 4.3% | 9.8% | 12.6% |
| Age 55 to 59 | 5.7% | 9.8% | 6.7% |
| Age 60 to 64 | 11.7% | 0.0% | 6.3% |
| Age 65 to 74 | 19.2% | 23.7% | 9.6% |
| Age 75 to 84 | 6.8% | 8.5% | 4.5% |
| Age 85 and over | 5.4% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Caldwell, OH | Waterford, OH | United States |
| White | 96.6% | 100.0% | 59.4% |
| Black | 0.4% | 0.0% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.6% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.8% | 0.0% | 3.2% |
| Hispanic | 1.6% | 0.0% | 18.4% |
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| Marriage & Family | | | |
| | Caldwell, OH | Waterford, OH | United States |
| Married Population | 46.3% | 63.4% | 49.8% |
| Currently Married | 45.0% | 63.4% | 48.0% |
| Married but Separated | 1.3% | 0.0% | 1.8% |
| Single Population | 53.7% | 36.6% | 50.2% |
| Never Married | 21.9% | 19.1% | 33.8% |
| Divorced | 15.4% | 7.3% | 10.8% |
| Widowed | 16.3% | 10.2% | 5.6% |
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| Household Size | 2.22 | 2.66 | 2.60 |
| Households | 999 | 146 | 124,010,992 |
| Family Households | 464 | 105 | 80,755,759 |
| Married couple, w/children | 14.9% | 31.4% | 30.5% |
| Married couple, no children | 65.1% | 51.4% | 42.9% |
| Non Family Households | 535 | 41 | 43,255,233 |
| Single householder, w/children | 14.9% | 17.1% | 15.8% |
| Single householder, no children | 5.2% | 0.0% | 10.8% |