| | Richburg, SC | Ridgeway, SC | United States |
| Population | 299 | 317 | 329,725,481 |
| Female Population | 55.5% | 48.9% | 50.5% |
| Male Population | 44.5% | 51.1% | 49.5% |
| Median Age | 58.2 | 42.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 275 | 308 | 309,327,143 |
| Population - 2000 | 332 | 328 | 285,036,114 |
| Population - 1990 | 405 | 407 | 251,960,433 |
| Pop. 2000 to Now | -22.0% | -14.9% | 15.6% |
| Pop. 1990 to Now | -36.1% | -31.5% | 30.8% |
| space4 | | | |
| Population Density | 341.3 | 653.6 | 93.4 |
| Land Area | 0.9 | 0.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Richburg, SC | Ridgeway, SC | United States |
| Age 0 to 4 | 0.0% | 5.7% | 5.9% |
| Age 5 to 9 | 3.3% | 6.0% | 6.1% |
| Age 10 to 14 | 1.7% | 2.5% | 6.6% |
| Age 15 to 17 | 3.7% | 1.9% | 3.9% |
| Age 18 to 20 | 3.7% | 2.5% | 4.0% |
| Age 21 to 24 | 6.0% | 6.3% | 5.2% |
| Age 25 to 34 | 10.4% | 23.0% | 13.8% |
| Age 35 to 44 | 4.0% | 4.4% | 12.9% |
| Age 45 to 54 | 9.4% | 12.3% | 12.6% |
| Age 55 to 59 | 12.0% | 4.4% | 6.7% |
| Age 60 to 64 | 8.4% | 5.7% | 6.3% |
| Age 65 to 74 | 14.4% | 18.9% | 9.6% |
| Age 75 to 84 | 21.7% | 3.5% | 4.5% |
| Age 85 and over | 1.3% | 2.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Richburg, SC | Ridgeway, SC | United States |
| White | 28.8% | 64.4% | 59.4% |
| Black | 66.6% | 23.7% | 12.2% |
| Asian | 1.7% | 0.3% | 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 | 0.7% | 0.0% | 3.2% |
| Hispanic | 2.3% | 11.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Richburg, SC | Ridgeway, SC | United States |
| Married Population | 36.6% | 39.3% | 49.8% |
| Currently Married | 35.2% | 38.2% | 48.0% |
| Married but Separated | 1.4% | 1.1% | 1.8% |
| Single Population | 63.4% | 60.7% | 50.2% |
| Never Married | 37.7% | 43.4% | 33.8% |
| Divorced | 7.0% | 10.3% | 10.8% |
| Widowed | 18.7% | 7.0% | 5.6% |
| space5 | | | |
| Household Size | 2.27 | 1.98 | 2.60 |
| Households | 132 | 160 | 124,010,992 |
| Family Households | 113 | 113 | 80,755,759 |
| Married couple, w/children | 0.0% | 15.9% | 30.5% |
| Married couple, no children | 38.9% | 29.2% | 42.9% |
| Non Family Households | 19 | 47 | 43,255,233 |
| Single householder, w/children | 12.4% | 36.3% | 15.8% |
| Single householder, no children | 48.7% | 18.6% | 10.8% |