| | Hurstbourne, KY | Rocky Hill, CT | United States |
| Population | 4,644 | 20,682 | 329,725,481 |
| Female Population | 46.9% | 52.6% | 50.5% |
| Male Population | 53.1% | 47.4% | 49.5% |
| Median Age | 40.1 | 44.2 | 38.4 |
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| Population - 2010 | 4,227 | 19,720 | 309,327,143 |
| Population - 2000 | 3,884 | 17,966 | 285,036,114 |
| Population - 1990 | 4,420 | 16,554 | 251,960,433 |
| Pop. 2000 to Now | 13.2% | 11.5% | 15.6% |
| Pop. 1990 to Now | -0.5% | 21.0% | 30.8% |
| space4 | | | |
| Population Density | 2,578.6 | 1,536.2 | 93.4 |
| Land Area | 1.8 | 13.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.4 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Hurstbourne, KY | Rocky Hill, CT | United States |
| Age 0 to 4 | 8.4% | 4.4% | 5.9% |
| Age 5 to 9 | 9.7% | 6.8% | 6.1% |
| Age 10 to 14 | 8.4% | 4.1% | 6.6% |
| Age 15 to 17 | 4.0% | 2.7% | 3.9% |
| Age 18 to 20 | 1.6% | 2.6% | 4.0% |
| Age 21 to 24 | 2.1% | 3.8% | 5.2% |
| Age 25 to 34 | 9.3% | 11.9% | 13.8% |
| Age 35 to 44 | 17.0% | 14.8% | 12.9% |
| Age 45 to 54 | 10.2% | 14.0% | 12.6% |
| Age 55 to 59 | 5.8% | 5.7% | 6.7% |
| Age 60 to 64 | 3.6% | 7.1% | 6.3% |
| Age 65 to 74 | 11.3% | 12.2% | 9.6% |
| Age 75 to 84 | 4.9% | 4.4% | 4.5% |
| Age 85 and over | 3.7% | 5.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | Hurstbourne, KY | Rocky Hill, CT | United States |
| White | 68.6% | 67.6% | 59.4% |
| Black | 4.3% | 3.7% | 12.2% |
| Asian | 15.8% | 18.0% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 0.0% | 0.8% | 0.4% |
| Two or More Races | 10.7% | 3.2% | 3.2% |
| Hispanic | 0.5% | 6.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Hurstbourne, KY | Rocky Hill, CT | United States |
| Married Population | 70.1% | 55.3% | 49.8% |
| Currently Married | 69.3% | 54.6% | 48.0% |
| Married but Separated | 0.7% | 0.7% | 1.8% |
| Single Population | 29.9% | 44.7% | 50.2% |
| Never Married | 19.4% | 28.7% | 33.8% |
| Divorced | 5.1% | 8.0% | 10.8% |
| Widowed | 5.5% | 7.9% | 5.6% |
| space5 | | | |
| Household Size | 2.72 | 2.24 | 2.60 |
| Households | 1,707 | 8,894 | 124,010,992 |
| Family Households | 1,192 | 5,593 | 80,755,759 |
| Married couple, w/children | 45.3% | 35.8% | 30.5% |
| Married couple, no children | 46.6% | 44.7% | 42.9% |
| Non Family Households | 515 | 3,301 | 43,255,233 |
| Single householder, w/children | 5.0% | 6.1% | 15.8% |
| Single householder, no children | 3.2% | 13.4% | 10.8% |