| | Poplarville, MS | Ogallala, NE | United States |
| Population | 2,837 | 4,831 | 329,725,481 |
| Female Population | 52.9% | 50.9% | 50.5% |
| Male Population | 47.1% | 49.1% | 49.5% |
| Median Age | 21.6 | 48.3 | 38.4 |
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| Population - 2010 | 2,874 | 4,733 | 309,327,143 |
| Population - 2000 | 2,601 | 4,930 | 285,036,114 |
| Population - 1990 | 2,561 | 5,095 | 251,960,433 |
| Pop. 2000 to Now | 6.9% | -9.3% | 15.6% |
| Pop. 1990 to Now | 8.6% | -12.2% | 30.8% |
| space4 | | | |
| Population Density | 523.6 | 974.6 | 93.4 |
| Land Area | 5.4 | 5.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Poplarville, MS | Ogallala, NE | United States |
| Age 0 to 4 | 7.2% | 5.7% | 5.9% |
| Age 5 to 9 | 7.4% | 7.7% | 6.1% |
| Age 10 to 14 | 5.9% | 6.4% | 6.6% |
| Age 15 to 17 | 3.9% | 2.8% | 3.9% |
| Age 18 to 20 | 23.9% | 1.7% | 4.0% |
| Age 21 to 24 | 7.4% | 3.6% | 5.2% |
| Age 25 to 34 | 10.5% | 10.9% | 13.8% |
| Age 35 to 44 | 11.8% | 9.6% | 12.9% |
| Age 45 to 54 | 8.1% | 11.0% | 12.6% |
| Age 55 to 59 | 1.4% | 8.3% | 6.7% |
| Age 60 to 64 | 3.6% | 6.5% | 6.3% |
| Age 65 to 74 | 4.2% | 11.2% | 9.6% |
| Age 75 to 84 | 2.7% | 7.5% | 4.5% |
| Age 85 and over | 2.1% | 7.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Poplarville, MS | Ogallala, NE | United States |
| White | 64.8% | 85.8% | 59.4% |
| Black | 32.9% | 1.7% | 12.2% |
| Asian | 0.0% | 0.6% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.8% | 0.0% | 0.4% |
| Two or More Races | 1.3% | 0.9% | 3.2% |
| Hispanic | 0.1% | 11.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Poplarville, MS | Ogallala, NE | United States |
| Married Population | 23.3% | 47.6% | 49.8% |
| Currently Married | 20.8% | 46.2% | 48.0% |
| Married but Separated | 2.5% | 1.4% | 1.8% |
| Single Population | 76.7% | 52.4% | 50.2% |
| Never Married | 58.1% | 22.3% | 33.8% |
| Divorced | 12.8% | 16.4% | 10.8% |
| Widowed | 5.8% | 13.7% | 5.6% |
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| Household Size | 3.36 | 2.11 | 2.60 |
| Households | 632 | 2,266 | 124,010,992 |
| Family Households | 438 | 1,061 | 80,755,759 |
| Married couple, w/children | 38.8% | 22.9% | 30.5% |
| Married couple, no children | 16.4% | 57.4% | 42.9% |
| Non Family Households | 194 | 1,205 | 43,255,233 |
| Single householder, w/children | 37.7% | 14.0% | 15.8% |
| Single householder, no children | 7.1% | 5.7% | 10.8% |