| | Hardinsburg, KY | Monticello, KY | United States |
| Population | 2,769 | 5,782 | 329,725,481 |
| Female Population | 52.2% | 50.3% | 50.5% |
| Male Population | 47.9% | 49.7% | 49.5% |
| Median Age | 41.5 | 38.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,331 | 6,174 | 309,327,143 |
| Population - 2000 | 2,345 | 5,981 | 285,036,114 |
| Population - 1990 | 1,906 | 5,357 | 251,960,433 |
| Pop. 2000 to Now | 0.0% | -1.3% | 15.6% |
| Pop. 1990 to Now | 23.0% | 10.3% | 30.8% |
| space4 | | | |
| Population Density | 800.8 | 985.0 | 93.4 |
| Land Area | 3.5 | 5.9 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Hardinsburg, KY | Monticello, KY | United States |
| Age 0 to 4 | 6.5% | 5.6% | 5.9% |
| Age 5 to 9 | 3.7% | 6.5% | 6.1% |
| Age 10 to 14 | 8.4% | 1.7% | 6.6% |
| Age 15 to 17 | 3.7% | 6.0% | 3.9% |
| Age 18 to 20 | 3.6% | 2.8% | 4.0% |
| Age 21 to 24 | 5.3% | 5.9% | 5.2% |
| Age 25 to 34 | 8.8% | 15.6% | 13.8% |
| Age 35 to 44 | 12.2% | 15.7% | 12.9% |
| Age 45 to 54 | 10.4% | 10.9% | 12.6% |
| Age 55 to 59 | 7.7% | 7.3% | 6.7% |
| Age 60 to 64 | 5.7% | 5.5% | 6.3% |
| Age 65 to 74 | 11.7% | 8.7% | 9.6% |
| Age 75 to 84 | 9.9% | 3.4% | 4.5% |
| Age 85 and over | 2.4% | 4.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Hardinsburg, KY | Monticello, KY | United States |
| White | 99.0% | 85.1% | 59.4% |
| Black | 0.3% | 3.2% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.1% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.6% | 1.7% | 3.2% |
| Hispanic | 0.0% | 9.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Hardinsburg, KY | Monticello, KY | United States |
| Married Population | 46.5% | 46.3% | 49.8% |
| Currently Married | 43.0% | 40.1% | 48.0% |
| Married but Separated | 3.4% | 6.2% | 1.8% |
| Single Population | 53.5% | 53.7% | 50.2% |
| Never Married | 24.9% | 33.1% | 33.8% |
| Divorced | 18.5% | 11.3% | 10.8% |
| Widowed | 10.1% | 9.3% | 5.6% |
| space5 | | | |
| Household Size | 2.39 | 2.49 | 2.60 |
| Households | 1,123 | 2,221 | 124,010,992 |
| Family Households | 611 | 1,339 | 80,755,759 |
| Married couple, w/children | 28.0% | 41.2% | 30.5% |
| Married couple, no children | 49.8% | 27.7% | 42.9% |
| Non Family Households | 512 | 882 | 43,255,233 |
| Single householder, w/children | 16.9% | 14.7% | 15.8% |
| Single householder, no children | 5.4% | 16.4% | 10.8% |