| | Register, GA | Rocky Ford, GA | United States |
| Population | 145 | 199 | 329,725,481 |
| Female Population | 46.9% | 57.8% | 50.5% |
| Male Population | 53.1% | 42.2% | 49.5% |
| Median Age | 35.8 | 54.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 181 | 143 | 309,327,143 |
| Population - 2000 | 164 | 186 | 285,036,114 |
| Population - 1990 | 195 | 197 | 251,960,433 |
| Pop. 2000 to Now | 20.1% | -26.3% | 15.6% |
| Pop. 1990 to Now | 1.0% | -30.5% | 30.8% |
| space4 | | | |
| Population Density | 186.4 | 164.3 | 93.4 |
| Land Area | 0.8 | 1.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Register, GA | Rocky Ford, GA | United States |
| Age 0 to 4 | 5.5% | 7.0% | 5.9% |
| Age 5 to 9 | 2.8% | 0.0% | 6.1% |
| Age 10 to 14 | 11.7% | 3.0% | 6.6% |
| Age 15 to 17 | 1.4% | 1.5% | 3.9% |
| Age 18 to 20 | 0.7% | 2.5% | 4.0% |
| Age 21 to 24 | 4.1% | 2.0% | 5.2% |
| Age 25 to 34 | 6.9% | 7.0% | 13.8% |
| Age 35 to 44 | 38.6% | 14.1% | 12.9% |
| Age 45 to 54 | 12.4% | 15.6% | 12.6% |
| Age 55 to 59 | 0.0% | 9.5% | 6.7% |
| Age 60 to 64 | 2.1% | 7.0% | 6.3% |
| Age 65 to 74 | 4.8% | 25.6% | 9.6% |
| Age 75 to 84 | 4.8% | 5.0% | 4.5% |
| Age 85 and over | 4.1% | 0.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Register, GA | Rocky Ford, GA | United States |
| White | 74.5% | 72.4% | 59.4% |
| Black | 3.4% | 25.6% | 12.2% |
| Asian | 2.8% | 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 | 19.3% | 2.0% | 3.2% |
| Hispanic | 0.0% | 0.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Register, GA | Rocky Ford, GA | United States |
| Married Population | 36.2% | 56.4% | 49.8% |
| Currently Married | 36.2% | 50.8% | 48.0% |
| Married but Separated | 0.0% | 5.6% | 1.8% |
| Single Population | 63.8% | 43.6% | 50.2% |
| Never Married | 7.8% | 29.1% | 33.8% |
| Divorced | 44.8% | 6.7% | 10.8% |
| Widowed | 11.2% | 7.8% | 5.6% |
| space5 | | | |
| Household Size | 2.59 | 2.03 | 2.60 |
| Households | 56 | 98 | 124,010,992 |
| Family Households | 34 | 67 | 80,755,759 |
| Married couple, w/children | 52.9% | 28.4% | 30.5% |
| Married couple, no children | 5.9% | 40.3% | 42.9% |
| Non Family Households | 22 | 31 | 43,255,233 |
| Single householder, w/children | 41.2% | 4.5% | 15.8% |
| Single householder, no children | 0.0% | 26.9% | 10.8% |