| | Riverside, OH | Lake City, SC | United States |
| Population | 24,472 | 6,028 | 329,725,481 |
| Female Population | 50.3% | 57.6% | 50.5% |
| Male Population | 49.8% | 42.5% | 49.5% |
| Median Age | 34.4 | 43.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 25,178 | 6,680 | 309,327,143 |
| Population - 2000 | 23,545 | 6,478 | 285,036,114 |
| Population - 1990 | 1,471 | 7,153 | 251,960,433 |
| Pop. 2000 to Now | 6.9% | -0.5% | 15.6% |
| Pop. 1990 to Now | 1,611.0% | -9.9% | 30.8% |
| space4 | | | |
| Population Density | 2,516.4 | 1,128.6 | 93.4 |
| Land Area | 9.7 | 5.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Riverside, OH | Lake City, SC | United States |
| Age 0 to 4 | 8.3% | 4.0% | 5.9% |
| Age 5 to 9 | 5.7% | 3.9% | 6.1% |
| Age 10 to 14 | 5.6% | 6.4% | 6.6% |
| Age 15 to 17 | 3.2% | 2.7% | 3.9% |
| Age 18 to 20 | 2.8% | 5.1% | 4.0% |
| Age 21 to 24 | 6.0% | 6.2% | 5.2% |
| Age 25 to 34 | 19.2% | 14.2% | 13.8% |
| Age 35 to 44 | 9.7% | 8.6% | 12.9% |
| Age 45 to 54 | 10.9% | 9.4% | 12.6% |
| Age 55 to 59 | 6.2% | 11.2% | 6.7% |
| Age 60 to 64 | 7.1% | 11.0% | 6.3% |
| Age 65 to 74 | 10.1% | 9.6% | 9.6% |
| Age 75 to 84 | 4.0% | 5.7% | 4.5% |
| Age 85 and over | 1.2% | 2.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Riverside, OH | Lake City, SC | United States |
| White | 80.5% | 24.1% | 59.4% |
| Black | 7.3% | 70.6% | 12.2% |
| Asian | 2.1% | 0.0% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.7% | 0.0% | 0.4% |
| Two or More Races | 4.6% | 4.7% | 3.2% |
| Hispanic | 4.8% | 0.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Riverside, OH | Lake City, SC | United States |
| Married Population | 46.0% | 23.3% | 49.8% |
| Currently Married | 44.4% | 17.3% | 48.0% |
| Married but Separated | 1.6% | 6.0% | 1.8% |
| Single Population | 54.0% | 76.7% | 50.2% |
| Never Married | 37.6% | 56.3% | 33.8% |
| Divorced | 11.6% | 9.6% | 10.8% |
| Widowed | 4.8% | 10.8% | 5.6% |
| space5 | | | |
| Household Size | 2.27 | 2.51 | 2.60 |
| Households | 10,759 | 2,400 | 124,010,992 |
| Family Households | 6,435 | 1,237 | 80,755,759 |
| Married couple, w/children | 23.7% | 9.8% | 30.5% |
| Married couple, no children | 41.4% | 21.7% | 42.9% |
| Non Family Households | 4,324 | 1,163 | 43,255,233 |
| Single householder, w/children | 21.6% | 33.6% | 15.8% |
| Single householder, no children | 13.3% | 34.9% | 10.8% |