| | Oglethorpe, GA | Mullins, SC | United States |
| Population | 1,279 | 4,068 | 329,725,481 |
| Female Population | 57.9% | 53.5% | 50.5% |
| Male Population | 42.1% | 46.5% | 49.5% |
| Median Age | 37.5 | 39.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,326 | 4,642 | 309,327,143 |
| Population - 2000 | 1,200 | 5,029 | 285,036,114 |
| Population - 1990 | 1,302 | 5,910 | 251,960,433 |
| Pop. 2000 to Now | -6.1% | -17.7% | 15.6% |
| Pop. 1990 to Now | -13.4% | -30.0% | 30.8% |
| space4 | | | |
| Population Density | 641.8 | 1,326.4 | 93.4 |
| Land Area | 2.0 | 3.1 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Oglethorpe, GA | Mullins, SC | United States |
| Age 0 to 4 | 9.3% | 6.4% | 5.9% |
| Age 5 to 9 | 5.4% | 7.5% | 6.1% |
| Age 10 to 14 | 7.9% | 6.5% | 6.6% |
| Age 15 to 17 | 6.2% | 5.3% | 3.9% |
| Age 18 to 20 | 4.3% | 3.6% | 4.0% |
| Age 21 to 24 | 4.5% | 3.9% | 5.2% |
| Age 25 to 34 | 9.3% | 8.3% | 13.8% |
| Age 35 to 44 | 14.9% | 18.1% | 12.9% |
| Age 45 to 54 | 13.3% | 13.1% | 12.6% |
| Age 55 to 59 | 3.0% | 2.0% | 6.7% |
| Age 60 to 64 | 4.1% | 6.7% | 6.3% |
| Age 65 to 74 | 7.0% | 10.0% | 9.6% |
| Age 75 to 84 | 10.6% | 5.5% | 4.5% |
| Age 85 and over | 0.4% | 3.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Oglethorpe, GA | Mullins, SC | United States |
| White | 20.9% | 23.9% | 59.4% |
| Black | 65.8% | 69.4% | 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 | 0.6% | 1.2% | 3.2% |
| Hispanic | 12.7% | 5.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Oglethorpe, GA | Mullins, SC | United States |
| Married Population | 30.6% | 27.9% | 49.8% |
| Currently Married | 29.2% | 22.2% | 48.0% |
| Married but Separated | 1.4% | 5.7% | 1.8% |
| Single Population | 69.4% | 72.1% | 50.2% |
| Never Married | 50.7% | 51.8% | 33.8% |
| Divorced | 5.4% | 8.9% | 10.8% |
| Widowed | 13.3% | 11.3% | 5.6% |
| space5 | | | |
| Household Size | 2.84 | 2.75 | 2.60 |
| Households | 443 | 1,442 | 124,010,992 |
| Family Households | 245 | 825 | 80,755,759 |
| Married couple, w/children | 16.7% | 19.6% | 30.5% |
| Married couple, no children | 35.5% | 17.1% | 42.9% |
| Non Family Households | 198 | 617 | 43,255,233 |
| Single householder, w/children | 32.2% | 24.7% | 15.8% |
| Single householder, no children | 15.5% | 38.5% | 10.8% |