| | Aberdeen, MS | Louisville, MS | United States |
| Population | 4,976 | 6,108 | 329,725,481 |
| Female Population | 47.4% | 50.2% | 50.5% |
| Male Population | 52.6% | 49.8% | 49.5% |
| Median Age | 39.2 | 38.5 | 38.4 |
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| Population - 2010 | 5,598 | 6,616 | 309,327,143 |
| Population - 2000 | 6,415 | 7,006 | 285,036,114 |
| Population - 1990 | 6,837 | 7,169 | 251,960,433 |
| Pop. 2000 to Now | -17.9% | -15.4% | 15.6% |
| Pop. 1990 to Now | -23.0% | -17.3% | 30.8% |
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| Population Density | 411.6 | 404.6 | 93.4 |
| Land Area | 12.1 | 15.1 | 3,531,905.4 |
| Water Area | 0.3 | 0.2 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Aberdeen, MS | Louisville, MS | United States |
| Age 0 to 4 | 6.8% | 4.5% | 5.9% |
| Age 5 to 9 | 4.9% | 7.6% | 6.1% |
| Age 10 to 14 | 7.3% | 10.3% | 6.6% |
| Age 15 to 17 | 3.1% | 4.2% | 3.9% |
| Age 18 to 20 | 2.7% | 6.0% | 4.0% |
| Age 21 to 24 | 5.0% | 3.1% | 5.2% |
| Age 25 to 34 | 13.8% | 10.2% | 13.8% |
| Age 35 to 44 | 13.0% | 12.4% | 12.9% |
| Age 45 to 54 | 9.9% | 8.8% | 12.6% |
| Age 55 to 59 | 4.7% | 8.8% | 6.7% |
| Age 60 to 64 | 9.3% | 5.6% | 6.3% |
| Age 65 to 74 | 10.5% | 8.5% | 9.6% |
| Age 75 to 84 | 7.0% | 7.6% | 4.5% |
| Age 85 and over | 2.2% | 2.4% | 1.9% |
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| Race | | | |
| | Aberdeen, MS | Louisville, MS | United States |
| White | 24.3% | 33.1% | 59.4% |
| Black | 75.1% | 63.6% | 12.2% |
| Asian | 0.0% | 0.2% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.0% | 1.5% | 3.2% |
| Hispanic | 0.6% | 1.4% | 18.4% |
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| Marriage & Family | | | |
| | Aberdeen, MS | Louisville, MS | United States |
| Married Population | 39.4% | 35.5% | 49.8% |
| Currently Married | 34.8% | 32.0% | 48.0% |
| Married but Separated | 4.6% | 3.5% | 1.8% |
| Single Population | 60.6% | 64.5% | 50.2% |
| Never Married | 40.3% | 50.1% | 33.8% |
| Divorced | 11.6% | 6.4% | 10.8% |
| Widowed | 8.6% | 8.0% | 5.6% |
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| Household Size | 2.55 | 2.61 | 2.60 |
| Households | 1,862 | 2,268 | 124,010,992 |
| Family Households | 1,139 | 1,439 | 80,755,759 |
| Married couple, w/children | 28.4% | 13.1% | 30.5% |
| Married couple, no children | 27.2% | 38.8% | 42.9% |
| Non Family Households | 723 | 829 | 43,255,233 |
| Single householder, w/children | 17.8% | 31.7% | 15.8% |
| Single householder, no children | 26.6% | 16.4% | 10.8% |