| | Carrollton, KY | Cynthiana, KY | United States |
| Population | 3,881 | 6,291 | 329,725,481 |
| Female Population | 44.3% | 54.3% | 50.5% |
| Male Population | 55.7% | 45.7% | 49.5% |
| Median Age | 38.7 | 39.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,931 | 6,357 | 309,327,143 |
| Population - 2000 | 3,846 | 6,258 | 285,036,114 |
| Population - 1990 | 3,715 | 6,497 | 251,960,433 |
| Pop. 2000 to Now | -1.0% | 0.7% | 15.6% |
| Pop. 1990 to Now | 2.5% | -3.0% | 30.8% |
| space4 | | | |
| Population Density | 1,906.2 | 1,517.0 | 93.4 |
| Land Area | 2.0 | 4.1 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Carrollton, KY | Cynthiana, KY | United States |
| Age 0 to 4 | 7.9% | 7.9% | 5.9% |
| Age 5 to 9 | 11.1% | 4.4% | 6.1% |
| Age 10 to 14 | 5.0% | 6.8% | 6.6% |
| Age 15 to 17 | 3.7% | 4.9% | 3.9% |
| Age 18 to 20 | 1.1% | 3.0% | 4.0% |
| Age 21 to 24 | 2.2% | 6.6% | 5.2% |
| Age 25 to 34 | 14.2% | 12.8% | 13.8% |
| Age 35 to 44 | 14.6% | 8.7% | 12.9% |
| Age 45 to 54 | 10.8% | 12.4% | 12.6% |
| Age 55 to 59 | 10.5% | 6.2% | 6.7% |
| Age 60 to 64 | 3.5% | 9.5% | 6.3% |
| Age 65 to 74 | 8.8% | 8.8% | 9.6% |
| Age 75 to 84 | 4.7% | 5.1% | 4.5% |
| Age 85 and over | 2.0% | 2.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Carrollton, KY | Cynthiana, KY | United States |
| White | 81.1% | 91.3% | 59.4% |
| Black | 6.9% | 2.2% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.8% | 3.6% | 3.2% |
| Hispanic | 10.1% | 3.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Carrollton, KY | Cynthiana, KY | United States |
| Married Population | 43.2% | 45.8% | 49.8% |
| Currently Married | 40.1% | 42.6% | 48.0% |
| Married but Separated | 3.2% | 3.1% | 1.8% |
| Single Population | 56.8% | 54.2% | 50.2% |
| Never Married | 25.7% | 31.4% | 33.8% |
| Divorced | 21.8% | 16.1% | 10.8% |
| Widowed | 9.3% | 6.7% | 5.6% |
| space5 | | | |
| Household Size | 2.42 | 2.44 | 2.60 |
| Households | 1,535 | 2,482 | 124,010,992 |
| Family Households | 917 | 1,618 | 80,755,759 |
| Married couple, w/children | 27.8% | 26.0% | 30.5% |
| Married couple, no children | 27.8% | 38.8% | 42.9% |
| Non Family Households | 618 | 864 | 43,255,233 |
| Single householder, w/children | 32.7% | 23.9% | 15.8% |
| Single householder, no children | 11.7% | 11.4% | 10.8% |