| | Pelion, SC | Gaston, SC | United States |
| Population | 1,090 | 2,089 | 329,725,481 |
| Female Population | 57.8% | 48.0% | 50.5% |
| Male Population | 42.2% | 52.0% | 49.5% |
| Median Age | 46.2 | 31.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 686 | 1,634 | 309,327,143 |
| Population - 2000 | 553 | 1,304 | 285,036,114 |
| Population - 1990 | 336 | 984 | 251,960,433 |
| Pop. 2000 to Now | 28.6% | 31.3% | 15.6% |
| Pop. 1990 to Now | 111.6% | 74.0% | 30.8% |
| space4 | | | |
| Population Density | 296.1 | 393.0 | 93.4 |
| Land Area | 3.7 | 5.3 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Pelion, SC | Gaston, SC | United States |
| Age 0 to 4 | 12.3% | 7.1% | 5.9% |
| Age 5 to 9 | 4.9% | 7.8% | 6.1% |
| Age 10 to 14 | 7.2% | 9.0% | 6.6% |
| Age 15 to 17 | 1.7% | 3.6% | 3.9% |
| Age 18 to 20 | 0.6% | 1.5% | 4.0% |
| Age 21 to 24 | 2.8% | 6.8% | 5.2% |
| Age 25 to 34 | 10.7% | 16.0% | 13.8% |
| Age 35 to 44 | 9.0% | 11.9% | 12.9% |
| Age 45 to 54 | 16.9% | 13.2% | 12.6% |
| Age 55 to 59 | 13.9% | 6.6% | 6.7% |
| Age 60 to 64 | 14.3% | 8.2% | 6.3% |
| Age 65 to 74 | 3.9% | 7.4% | 9.6% |
| Age 75 to 84 | 1.4% | 0.8% | 4.5% |
| Age 85 and over | 0.6% | 0.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Pelion, SC | Gaston, SC | United States |
| White | 79.9% | 57.2% | 59.4% |
| Black | 0.9% | 17.2% | 12.2% |
| Asian | 0.5% | 1.5% | 5.6% |
| Native American | 0.1% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 7.3% | 6.6% | 3.2% |
| Hispanic | 11.3% | 17.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Pelion, SC | Gaston, SC | United States |
| Married Population | 69.5% | 42.2% | 49.8% |
| Currently Married | 68.0% | 39.2% | 48.0% |
| Married but Separated | 1.6% | 3.0% | 1.8% |
| Single Population | 30.5% | 57.8% | 50.2% |
| Never Married | 18.4% | 36.9% | 33.8% |
| Divorced | 10.7% | 17.2% | 10.8% |
| Widowed | 1.3% | 3.7% | 5.6% |
| space5 | | | |
| Household Size | 2.90 | 2.59 | 2.60 |
| Households | 365 | 806 | 124,010,992 |
| Family Households | 314 | 549 | 80,755,759 |
| Married couple, w/children | 31.2% | 19.7% | 30.5% |
| Married couple, no children | 50.6% | 31.7% | 42.9% |
| Non Family Households | 51 | 257 | 43,255,233 |
| Single householder, w/children | 11.1% | 34.8% | 15.8% |
| Single householder, no children | 7.0% | 13.8% | 10.8% |