| | Mound Bayou, MS | Shelby, MS | United States |
| Population | 1,792 | 1,616 | 329,725,481 |
| Female Population | 56.1% | 55.9% | 50.5% |
| Male Population | 43.9% | 44.1% | 49.5% |
| Median Age | 34.2 | 42.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,536 | 2,226 | 309,327,143 |
| Population - 2000 | 2,102 | 2,926 | 285,036,114 |
| Population - 1990 | 2,222 | 2,806 | 251,960,433 |
| Pop. 2000 to Now | -36.2% | -34.7% | 15.6% |
| Pop. 1990 to Now | -39.7% | -31.9% | 30.8% |
| space4 | | | |
| Population Density | 2,043.3 | 591.7 | 93.4 |
| Land Area | 0.9 | 2.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Mound Bayou, MS | Shelby, MS | United States |
| Age 0 to 4 | 6.4% | 8.0% | 5.9% |
| Age 5 to 9 | 9.7% | 6.1% | 6.1% |
| Age 10 to 14 | 10.9% | 3.5% | 6.6% |
| Age 15 to 17 | 5.0% | 4.9% | 3.9% |
| Age 18 to 20 | 3.8% | 4.9% | 4.0% |
| Age 21 to 24 | 3.8% | 7.6% | 5.2% |
| Age 25 to 34 | 11.5% | 7.8% | 13.8% |
| Age 35 to 44 | 10.0% | 9.5% | 12.9% |
| Age 45 to 54 | 11.8% | 17.5% | 12.6% |
| Age 55 to 59 | 11.0% | 8.0% | 6.7% |
| Age 60 to 64 | 3.9% | 10.3% | 6.3% |
| Age 65 to 74 | 9.0% | 8.0% | 9.6% |
| Age 75 to 84 | 1.1% | 1.7% | 4.5% |
| Age 85 and over | 2.1% | 2.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Mound Bayou, MS | Shelby, MS | United States |
| White | 0.0% | 4.4% | 59.4% |
| Black | 99.6% | 93.9% | 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 | 0.4% | 1.7% | 3.2% |
| Hispanic | 0.0% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Mound Bayou, MS | Shelby, MS | United States |
| Married Population | 30.8% | 34.6% | 49.8% |
| Currently Married | 22.2% | 27.7% | 48.0% |
| Married but Separated | 8.6% | 6.9% | 1.8% |
| Single Population | 69.2% | 65.4% | 50.2% |
| Never Married | 46.5% | 57.0% | 33.8% |
| Divorced | 13.8% | 6.0% | 10.8% |
| Widowed | 8.9% | 2.4% | 5.6% |
| space5 | | | |
| Household Size | 2.86 | 2.51 | 2.60 |
| Households | 626 | 628 | 124,010,992 |
| Family Households | 348 | 418 | 80,755,759 |
| Married couple, w/children | 22.7% | 7.2% | 30.5% |
| Married couple, no children | 17.2% | 37.3% | 42.9% |
| Non Family Households | 278 | 210 | 43,255,233 |
| Single householder, w/children | 34.5% | 32.1% | 15.8% |
| Single householder, no children | 25.6% | 23.4% | 10.8% |