| | Walnut Creek, OH | Berea, OH | United States |
| Population | 1,384 | 18,724 | 329,725,481 |
| Female Population | 50.3% | 53.5% | 50.5% |
| Male Population | 49.7% | 46.5% | 49.5% |
| Median Age | 37.9 | 35.9 | 38.4 |
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| Population - 2010 | 387 | 19,164 | 309,327,143 |
| Population - 2000 | 730 | 18,970 | 285,036,114 |
| Population - 1990 | 640 | 19,051 | 251,960,433 |
| Pop. 2000 to Now | 61.6% | -2.4% | 15.6% |
| Pop. 1990 to Now | 84.4% | -2.9% | 30.8% |
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| Population Density | 622.6 | 3,308.7 | 93.4 |
| Land Area | 2.2 | 5.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Walnut Creek, OH | Berea, OH | United States |
| Age 0 to 4 | 7.2% | 4.0% | 5.9% |
| Age 5 to 9 | 6.1% | 5.3% | 6.1% |
| Age 10 to 14 | 7.0% | 5.5% | 6.6% |
| Age 15 to 17 | 1.7% | 3.9% | 3.9% |
| Age 18 to 20 | 2.0% | 11.7% | 4.0% |
| Age 21 to 24 | 3.3% | 6.9% | 5.2% |
| Age 25 to 34 | 20.3% | 11.7% | 13.8% |
| Age 35 to 44 | 8.5% | 12.0% | 12.9% |
| Age 45 to 54 | 5.8% | 9.9% | 12.6% |
| Age 55 to 59 | 8.6% | 6.5% | 6.7% |
| Age 60 to 64 | 5.4% | 6.0% | 6.3% |
| Age 65 to 74 | 7.9% | 9.4% | 9.6% |
| Age 75 to 84 | 5.8% | 5.0% | 4.5% |
| Age 85 and over | 10.3% | 2.2% | 1.9% |
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| Race | | | |
| | Walnut Creek, OH | Berea, OH | United States |
| White | 100.0% | 80.8% | 59.4% |
| Black | 0.0% | 8.2% | 12.2% |
| Asian | 0.0% | 1.9% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.3% | 0.2% |
| Other | 0.0% | 0.5% | 0.4% |
| Two or More Races | 0.0% | 5.5% | 3.2% |
| Hispanic | 0.0% | 2.8% | 18.4% |
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| Marriage & Family | | | |
| | Walnut Creek, OH | Berea, OH | United States |
| Married Population | 41.7% | 36.4% | 49.8% |
| Currently Married | 41.7% | 35.5% | 48.0% |
| Married but Separated | 0.0% | 1.0% | 1.8% |
| Single Population | 58.3% | 63.6% | 50.2% |
| Never Married | 29.0% | 46.7% | 33.8% |
| Divorced | 16.2% | 11.1% | 10.8% |
| Widowed | 13.0% | 5.8% | 5.6% |
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| Household Size | 3.37 | 2.33 | 2.60 |
| Households | 342 | 6,978 | 124,010,992 |
| Family Households | 270 | 3,905 | 80,755,759 |
| Married couple, w/children | 33.0% | 27.5% | 30.5% |
| Married couple, no children | 32.2% | 42.0% | 42.9% |
| Non Family Households | 72 | 3,073 | 43,255,233 |
| Single householder, w/children | 28.1% | 20.8% | 15.8% |
| Single householder, no children | 6.7% | 9.7% | 10.8% |