| | Selmer, TN | Aberdeen, MS | United States |
| Population | 4,421 | 4,976 | 329,725,481 |
| Female Population | 50.1% | 47.4% | 50.5% |
| Male Population | 49.9% | 52.6% | 49.5% |
| Median Age | 37 | 39.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 4,311 | 5,598 | 309,327,143 |
| Population - 2000 | 4,541 | 6,415 | 285,036,114 |
| Population - 1990 | 3,838 | 6,837 | 251,960,433 |
| Pop. 2000 to Now | -5.8% | -17.9% | 15.6% |
| Pop. 1990 to Now | 11.5% | -23.0% | 30.8% |
| space4 | | | |
| Population Density | 462.9 | 411.6 | 93.4 |
| Land Area | 9.6 | 12.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.3 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Selmer, TN | Aberdeen, MS | United States |
| Age 0 to 4 | 5.5% | 6.8% | 5.9% |
| Age 5 to 9 | 5.1% | 4.9% | 6.1% |
| Age 10 to 14 | 5.5% | 7.3% | 6.6% |
| Age 15 to 17 | 2.2% | 3.1% | 3.9% |
| Age 18 to 20 | 0.4% | 2.7% | 4.0% |
| Age 21 to 24 | 6.4% | 5.0% | 5.2% |
| Age 25 to 34 | 20.5% | 13.8% | 13.8% |
| Age 35 to 44 | 10.6% | 13.0% | 12.9% |
| Age 45 to 54 | 9.8% | 9.9% | 12.6% |
| Age 55 to 59 | 6.0% | 4.7% | 6.7% |
| Age 60 to 64 | 6.4% | 9.3% | 6.3% |
| Age 65 to 74 | 11.3% | 10.5% | 9.6% |
| Age 75 to 84 | 7.4% | 7.0% | 4.5% |
| Age 85 and over | 3.0% | 2.2% | 1.9% |
| space1 | | | |
| Race | | | |
| | Selmer, TN | Aberdeen, MS | United States |
| White | 84.2% | 24.3% | 59.4% |
| Black | 13.8% | 75.1% | 12.2% |
| Asian | 1.1% | 0.0% | 5.6% |
| Native American | 0.2% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.6% | 0.0% | 3.2% |
| Hispanic | 0.0% | 0.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Selmer, TN | Aberdeen, MS | United States |
| Married Population | 49.5% | 39.4% | 49.8% |
| Currently Married | 47.8% | 34.8% | 48.0% |
| Married but Separated | 1.7% | 4.6% | 1.8% |
| Single Population | 50.5% | 60.6% | 50.2% |
| Never Married | 23.1% | 40.3% | 33.8% |
| Divorced | 16.7% | 11.6% | 10.8% |
| Widowed | 10.7% | 8.6% | 5.6% |
| space5 | | | |
| Household Size | 2.26 | 2.55 | 2.60 |
| Households | 1,858 | 1,862 | 124,010,992 |
| Family Households | 1,067 | 1,139 | 80,755,759 |
| Married couple, w/children | 28.0% | 28.4% | 30.5% |
| Married couple, no children | 43.9% | 27.2% | 42.9% |
| Non Family Households | 791 | 723 | 43,255,233 |
| Single householder, w/children | 15.7% | 17.8% | 15.8% |
| Single householder, no children | 12.5% | 26.6% | 10.8% |