| | Magnolia, MS | Summit, MS | United States |
| Population | 3,309 | 3,120 | 329,725,481 |
| Female Population | 44.5% | 51.0% | 50.5% |
| Male Population | 55.5% | 49.0% | 49.5% |
| Median Age | 33.1 | 23.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,406 | 1,719 | 309,327,143 |
| Population - 2000 | 2,071 | 1,428 | 285,036,114 |
| Population - 1990 | 2,245 | 1,566 | 251,960,433 |
| Pop. 2000 to Now | 5.0% | 8.5% | 15.6% |
| Pop. 1990 to Now | -3.2% | -1.1% | 30.8% |
| space4 | | | |
| Population Density | 538.7 | 1,379.3 | 93.4 |
| Land Area | 6.1 | 2.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Magnolia, MS | Summit, MS | United States |
| Age 0 to 4 | 5.0% | 13.7% | 5.9% |
| Age 5 to 9 | 5.2% | 13.1% | 6.1% |
| Age 10 to 14 | 7.2% | 8.6% | 6.6% |
| Age 15 to 17 | 6.7% | 7.4% | 3.9% |
| Age 18 to 20 | 2.8% | 3.0% | 4.0% |
| Age 21 to 24 | 10.7% | 7.0% | 5.2% |
| Age 25 to 34 | 14.8% | 12.4% | 13.8% |
| Age 35 to 44 | 9.7% | 9.0% | 12.9% |
| Age 45 to 54 | 10.6% | 7.7% | 12.6% |
| Age 55 to 59 | 4.3% | 3.3% | 6.7% |
| Age 60 to 64 | 5.4% | 5.9% | 6.3% |
| Age 65 to 74 | 11.9% | 6.2% | 9.6% |
| Age 75 to 84 | 2.9% | 2.6% | 4.5% |
| Age 85 and over | 2.7% | 0.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Magnolia, MS | Summit, MS | United States |
| White | 31.3% | 10.1% | 59.4% |
| Black | 64.9% | 88.6% | 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 | 1.7% | 0.9% | 3.2% |
| Hispanic | 2.2% | 0.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Magnolia, MS | Summit, MS | United States |
| Married Population | 33.2% | 30.4% | 49.8% |
| Currently Married | 30.3% | 22.9% | 48.0% |
| Married but Separated | 2.9% | 7.4% | 1.8% |
| Single Population | 66.8% | 69.6% | 50.2% |
| Never Married | 49.3% | 48.7% | 33.8% |
| Divorced | 8.6% | 17.8% | 10.8% |
| Widowed | 9.0% | 3.1% | 5.6% |
| space5 | | | |
| Household Size | 3.24 | 3.70 | 2.60 |
| Households | 947 | 843 | 124,010,992 |
| Family Households | 592 | 517 | 80,755,759 |
| Married couple, w/children | 19.9% | 10.4% | 30.5% |
| Married couple, no children | 34.1% | 27.7% | 42.9% |
| Non Family Households | 355 | 326 | 43,255,233 |
| Single householder, w/children | 27.0% | 47.0% | 15.8% |
| Single householder, no children | 18.9% | 14.9% | 10.8% |