| | Gloster, MS | Mehlville, MO | United States |
| Population | 1,158 | 28,672 | 329,725,481 |
| Female Population | 51.8% | 50.7% | 50.5% |
| Male Population | 48.2% | 49.3% | 49.5% |
| Median Age | 40.5 | 41.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 953 | 27,364 | 309,327,143 |
| Population - 2000 | 1,073 | 28,822 | 285,036,114 |
| Population - 1990 | 1,323 | 27,557 | 251,960,433 |
| Pop. 2000 to Now | -20.6% | -1.9% | 15.6% |
| Pop. 1990 to Now | -35.6% | 2.6% | 30.8% |
| space4 | | | |
| Population Density | 634.9 | 3,841.9 | 93.4 |
| Land Area | 1.8 | 7.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Gloster, MS | Mehlville, MO | United States |
| Age 0 to 4 | 8.5% | 5.4% | 5.9% |
| Age 5 to 9 | 6.2% | 5.1% | 6.1% |
| Age 10 to 14 | 12.3% | 4.9% | 6.6% |
| Age 15 to 17 | 3.1% | 2.8% | 3.9% |
| Age 18 to 20 | 1.1% | 2.5% | 4.0% |
| Age 21 to 24 | 6.5% | 6.3% | 5.2% |
| Age 25 to 34 | 10.6% | 13.7% | 13.8% |
| Age 35 to 44 | 10.5% | 12.0% | 12.9% |
| Age 45 to 54 | 11.6% | 11.8% | 12.6% |
| Age 55 to 59 | 12.5% | 7.5% | 6.7% |
| Age 60 to 64 | 8.0% | 7.6% | 6.3% |
| Age 65 to 74 | 4.1% | 11.0% | 9.6% |
| Age 75 to 84 | 5.0% | 6.8% | 4.5% |
| Age 85 and over | 0.0% | 2.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Gloster, MS | Mehlville, MO | United States |
| White | 27.5% | 88.5% | 59.4% |
| Black | 71.9% | 4.5% | 12.2% |
| Asian | 0.0% | 2.7% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 0.0% | 1.7% | 3.2% |
| Hispanic | 0.6% | 2.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Gloster, MS | Mehlville, MO | United States |
| Married Population | 47.4% | 48.7% | 49.8% |
| Currently Married | 41.6% | 47.1% | 48.0% |
| Married but Separated | 5.8% | 1.6% | 1.8% |
| Single Population | 52.6% | 51.3% | 50.2% |
| Never Married | 37.8% | 32.5% | 33.8% |
| Divorced | 10.8% | 11.7% | 10.8% |
| Widowed | 4.0% | 7.1% | 5.6% |
| space5 | | | |
| Household Size | 2.36 | 2.18 | 2.60 |
| Households | 491 | 13,092 | 124,010,992 |
| Family Households | 288 | 7,460 | 80,755,759 |
| Married couple, w/children | 15.6% | 23.7% | 30.5% |
| Married couple, no children | 38.2% | 50.6% | 42.9% |
| Non Family Households | 203 | 5,632 | 43,255,233 |
| Single householder, w/children | 38.9% | 15.9% | 15.8% |
| Single householder, no children | 7.3% | 9.9% | 10.8% |