| | Purvis, MS | Liberty, MS | United States |
| Population | 1,982 | 833 | 329,725,481 |
| Female Population | 49.7% | 52.5% | 50.5% |
| Male Population | 50.3% | 47.5% | 49.5% |
| Median Age | 38.8 | 43.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,187 | 700 | 309,327,143 |
| Population - 2000 | 2,164 | 633 | 285,036,114 |
| Population - 1990 | 2,140 | 624 | 251,960,433 |
| Pop. 2000 to Now | 10.8% | 0.2% | 15.6% |
| Pop. 1990 to Now | 12.1% | 1.6% | 30.8% |
| space4 | | | |
| Population Density | 473.3 | 404.2 | 93.4 |
| Land Area | 4.2 | 2.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Purvis, MS | Liberty, MS | United States |
| Age 0 to 4 | 6.3% | 5.4% | 5.9% |
| Age 5 to 9 | 6.6% | 4.3% | 6.1% |
| Age 10 to 14 | 10.1% | 7.6% | 6.6% |
| Age 15 to 17 | 3.5% | 8.9% | 3.9% |
| Age 18 to 20 | 1.8% | 0.2% | 4.0% |
| Age 21 to 24 | 5.5% | 1.2% | 5.2% |
| Age 25 to 34 | 11.2% | 9.8% | 13.8% |
| Age 35 to 44 | 10.6% | 12.8% | 12.9% |
| Age 45 to 54 | 10.5% | 16.1% | 12.6% |
| Age 55 to 59 | 7.6% | 1.3% | 6.7% |
| Age 60 to 64 | 3.2% | 4.4% | 6.3% |
| Age 65 to 74 | 12.7% | 13.0% | 9.6% |
| Age 75 to 84 | 9.0% | 8.2% | 4.5% |
| Age 85 and over | 1.5% | 6.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Purvis, MS | Liberty, MS | United States |
| White | 70.9% | 63.1% | 59.4% |
| Black | 22.8% | 31.2% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 1.4% | 0.0% | 0.4% |
| Two or More Races | 3.5% | 5.3% | 3.2% |
| Hispanic | 1.4% | 0.1% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Purvis, MS | Liberty, MS | United States |
| Married Population | 43.2% | 45.3% | 49.8% |
| Currently Married | 37.6% | 42.1% | 48.0% |
| Married but Separated | 5.6% | 3.2% | 1.8% |
| Single Population | 56.8% | 54.7% | 50.2% |
| Never Married | 27.7% | 29.0% | 33.8% |
| Divorced | 13.6% | 14.8% | 10.8% |
| Widowed | 15.5% | 10.9% | 5.6% |
| space5 | | | |
| Household Size | 2.47 | 2.29 | 2.60 |
| Households | 759 | 322 | 124,010,992 |
| Family Households | 490 | 178 | 80,755,759 |
| Married couple, w/children | 26.3% | 42.1% | 30.5% |
| Married couple, no children | 29.4% | 33.1% | 42.9% |
| Non Family Households | 269 | 144 | 43,255,233 |
| Single householder, w/children | 19.2% | 15.2% | 15.8% |
| Single householder, no children | 25.1% | 9.6% | 10.8% |