| | Rockford, OH | Hernando, MS | United States |
| Population | 838 | 16,730 | 329,725,481 |
| Female Population | 45.1% | 52.3% | 50.5% |
| Male Population | 54.9% | 47.7% | 49.5% |
| Median Age | 51.1 | 36.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,119 | 14,119 | 309,327,143 |
| Population - 2000 | 1,126 | 6,812 | 285,036,114 |
| Population - 1990 | 1,119 | 3,125 | 251,960,433 |
| Pop. 2000 to Now | -1.9% | 147.4% | 15.6% |
| Pop. 1990 to Now | -1.3% | 439.3% | 30.8% |
| space4 | | | |
| Population Density | 1,023.2 | 661.2 | 93.4 |
| Land Area | 0.8 | 25.3 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Rockford, OH | Hernando, MS | United States |
| Age 0 to 4 | 5.4% | 9.2% | 5.9% |
| Age 5 to 9 | 3.9% | 6.7% | 6.1% |
| Age 10 to 14 | 3.9% | 7.4% | 6.6% |
| Age 15 to 17 | 1.9% | 2.7% | 3.9% |
| Age 18 to 20 | 0.6% | 2.1% | 4.0% |
| Age 21 to 24 | 4.3% | 4.9% | 5.2% |
| Age 25 to 34 | 13.7% | 14.0% | 13.8% |
| Age 35 to 44 | 8.6% | 12.8% | 12.9% |
| Age 45 to 54 | 14.0% | 11.1% | 12.6% |
| Age 55 to 59 | 8.6% | 3.7% | 6.7% |
| Age 60 to 64 | 6.1% | 6.1% | 6.3% |
| Age 65 to 74 | 16.5% | 13.9% | 9.6% |
| Age 75 to 84 | 10.3% | 4.5% | 4.5% |
| Age 85 and over | 2.3% | 0.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Rockford, OH | Hernando, MS | United States |
| White | 95.0% | 77.2% | 59.4% |
| Black | 1.0% | 16.6% | 12.2% |
| Asian | 0.0% | 0.7% | 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 | 0.8% | 1.0% | 3.2% |
| Hispanic | 3.2% | 4.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Rockford, OH | Hernando, MS | United States |
| Married Population | 55.4% | 59.8% | 49.8% |
| Currently Married | 55.2% | 58.9% | 48.0% |
| Married but Separated | 0.3% | 0.8% | 1.8% |
| Single Population | 44.6% | 40.2% | 50.2% |
| Never Married | 27.1% | 20.1% | 33.8% |
| Divorced | 8.9% | 13.6% | 10.8% |
| Widowed | 8.5% | 6.6% | 5.6% |
| space5 | | | |
| Household Size | 2.17 | 2.53 | 2.60 |
| Households | 365 | 6,525 | 124,010,992 |
| Family Households | 231 | 4,809 | 80,755,759 |
| Married couple, w/children | 22.5% | 34.5% | 30.5% |
| Married couple, no children | 55.4% | 42.5% | 42.9% |
| Non Family Households | 134 | 1,716 | 43,255,233 |
| Single householder, w/children | 11.3% | 18.1% | 15.8% |
| Single householder, no children | 10.8% | 4.9% | 10.8% |