| | Hardinsburg, IN | Demopolis, AL | United States |
| Population | 196 | 7,134 | 329,725,481 |
| Female Population | 68.9% | 55.3% | 50.5% |
| Male Population | 31.1% | 44.7% | 49.5% |
| Median Age | 34.5 | 41.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 247 | 7,444 | 309,327,143 |
| Population - 2000 | 244 | 7,540 | 285,036,114 |
| Population - 1990 | 322 | 7,512 | 251,960,433 |
| Pop. 2000 to Now | 0.0% | -13.3% | 15.6% |
| Pop. 1990 to Now | -24.2% | -13.0% | 30.8% |
| space4 | | | |
| Population Density | 96.3 | 402.2 | 93.4 |
| Land Area | 2.0 | 17.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Hardinsburg, IN | Demopolis, AL | United States |
| Age 0 to 4 | 4.6% | 6.8% | 5.9% |
| Age 5 to 9 | 17.9% | 7.2% | 6.1% |
| Age 10 to 14 | 14.3% | 6.4% | 6.6% |
| Age 15 to 17 | 1.0% | 2.9% | 3.9% |
| Age 18 to 20 | 0.0% | 3.3% | 4.0% |
| Age 21 to 24 | 0.0% | 4.1% | 5.2% |
| Age 25 to 34 | 12.8% | 11.3% | 13.8% |
| Age 35 to 44 | 11.7% | 11.8% | 12.9% |
| Age 45 to 54 | 12.2% | 12.8% | 12.6% |
| Age 55 to 59 | 3.1% | 4.3% | 6.7% |
| Age 60 to 64 | 4.1% | 7.9% | 6.3% |
| Age 65 to 74 | 8.7% | 12.5% | 9.6% |
| Age 75 to 84 | 7.7% | 5.7% | 4.5% |
| Age 85 and over | 2.0% | 3.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Hardinsburg, IN | Demopolis, AL | United States |
| White | 77.6% | 48.9% | 59.4% |
| Black | 0.0% | 45.9% | 12.2% |
| Asian | 0.0% | 1.5% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 22.4% | 1.7% | 3.2% |
| Hispanic | 0.0% | 1.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Hardinsburg, IN | Demopolis, AL | United States |
| Married Population | 55.6% | 39.5% | 49.8% |
| Currently Married | 50.8% | 36.0% | 48.0% |
| Married but Separated | 4.8% | 3.5% | 1.8% |
| Single Population | 44.4% | 60.5% | 50.2% |
| Never Married | 14.5% | 33.7% | 33.8% |
| Divorced | 13.7% | 11.7% | 10.8% |
| Widowed | 16.1% | 15.1% | 5.6% |
| space5 | | | |
| Household Size | 2.48 | 2.31 | 2.60 |
| Households | 79 | 3,042 | 124,010,992 |
| Family Households | 51 | 1,473 | 80,755,759 |
| Married couple, w/children | 23.5% | 22.6% | 30.5% |
| Married couple, no children | 27.5% | 38.6% | 42.9% |
| Non Family Households | 28 | 1,569 | 43,255,233 |
| Single householder, w/children | 43.1% | 20.7% | 15.8% |
| Single householder, no children | 5.9% | 18.1% | 10.8% |