| | Bellbrook, OH | Kettering, OH | United States |
| Population | 7,266 | 57,503 | 329,725,481 |
| Female Population | 49.5% | 51.6% | 50.5% |
| Male Population | 50.6% | 48.4% | 49.5% |
| Median Age | 40.2 | 39.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 6,965 | 56,133 | 309,327,143 |
| Population - 2000 | 7,009 | 57,502 | 285,036,114 |
| Population - 1990 | 6,511 | 60,569 | 251,960,433 |
| Pop. 2000 to Now | 5.3% | -4.8% | 15.6% |
| Pop. 1990 to Now | 13.4% | -9.6% | 30.8% |
| space4 | | | |
| Population Density | 2,317.7 | 3,074.0 | 93.4 |
| Land Area | 3.1 | 18.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Bellbrook, OH | Kettering, OH | United States |
| Age 0 to 4 | 5.3% | 5.9% | 5.9% |
| Age 5 to 9 | 5.3% | 5.5% | 6.1% |
| Age 10 to 14 | 6.3% | 6.1% | 6.6% |
| Age 15 to 17 | 4.3% | 3.9% | 3.9% |
| Age 18 to 20 | 2.1% | 2.3% | 4.0% |
| Age 21 to 24 | 3.7% | 5.0% | 5.2% |
| Age 25 to 34 | 16.7% | 15.6% | 13.8% |
| Age 35 to 44 | 11.5% | 12.3% | 12.9% |
| Age 45 to 54 | 12.2% | 10.9% | 12.6% |
| Age 55 to 59 | 9.7% | 7.4% | 6.7% |
| Age 60 to 64 | 6.8% | 6.7% | 6.3% |
| Age 65 to 74 | 10.7% | 10.2% | 9.6% |
| Age 75 to 84 | 3.1% | 5.1% | 4.5% |
| Age 85 and over | 2.3% | 3.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Bellbrook, OH | Kettering, OH | United States |
| White | 91.4% | 86.7% | 59.4% |
| Black | 0.6% | 5.2% | 12.2% |
| Asian | 4.1% | 2.5% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.4% | 0.4% |
| Two or More Races | 2.1% | 3.0% | 3.2% |
| Hispanic | 1.8% | 2.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Bellbrook, OH | Kettering, OH | United States |
| Married Population | 65.9% | 51.0% | 49.8% |
| Currently Married | 64.3% | 49.6% | 48.0% |
| Married but Separated | 1.6% | 1.4% | 1.8% |
| Single Population | 34.2% | 49.0% | 50.2% |
| Never Married | 21.9% | 30.0% | 33.8% |
| Divorced | 8.1% | 13.2% | 10.8% |
| Widowed | 4.1% | 5.8% | 5.6% |
| space5 | | | |
| Household Size | 2.33 | 2.20 | 2.60 |
| Households | 3,125 | 25,887 | 124,010,992 |
| Family Households | 2,087 | 15,046 | 80,755,759 |
| Married couple, w/children | 41.4% | 28.7% | 30.5% |
| Married couple, no children | 51.3% | 47.1% | 42.9% |
| Non Family Households | 1,038 | 10,841 | 43,255,233 |
| Single householder, w/children | 4.0% | 16.2% | 15.8% |
| Single householder, no children | 3.4% | 8.0% | 10.8% |