| | Melrose, IA | Donalsonville, GA | United States |
| Population | 204 | 2,808 | 329,725,481 |
| Female Population | 58.3% | 57.9% | 50.5% |
| Male Population | 41.7% | 42.1% | 49.5% |
| Median Age | 39.8 | 33.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 112 | 2,669 | 309,327,143 |
| Population - 2000 | 130 | 2,796 | 285,036,114 |
| Population - 1990 | 150 | 2,761 | 251,960,433 |
| Pop. 2000 to Now | -18.5% | -11.0% | 15.6% |
| Pop. 1990 to Now | -29.3% | -9.9% | 30.8% |
| space4 | | | |
| Population Density | 202.0 | 707.1 | 93.4 |
| Land Area | 1.0 | 4.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Melrose, IA | Donalsonville, GA | United States |
| Age 0 to 4 | 1.0% | 5.2% | 5.9% |
| Age 5 to 9 | 3.4% | 11.7% | 6.1% |
| Age 10 to 14 | 10.3% | 7.1% | 6.6% |
| Age 15 to 17 | 7.4% | 3.8% | 3.9% |
| Age 18 to 20 | 15.2% | 4.2% | 4.0% |
| Age 21 to 24 | 1.0% | 6.2% | 5.2% |
| Age 25 to 34 | 1.0% | 12.0% | 13.8% |
| Age 35 to 44 | 16.2% | 8.0% | 12.9% |
| Age 45 to 54 | 1.5% | 11.0% | 12.6% |
| Age 55 to 59 | 0.5% | 5.4% | 6.7% |
| Age 60 to 64 | 2.0% | 4.5% | 6.3% |
| Age 65 to 74 | 17.6% | 14.1% | 9.6% |
| Age 75 to 84 | 6.9% | 5.8% | 4.5% |
| Age 85 and over | 16.2% | 1.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Melrose, IA | Donalsonville, GA | United States |
| White | 84.3% | 25.5% | 59.4% |
| Black | 0.0% | 71.5% | 12.2% |
| Asian | 1.0% | 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 | 14.7% | 0.5% | 3.2% |
| Hispanic | 0.0% | 1.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Melrose, IA | Donalsonville, GA | United States |
| Married Population | 54.0% | 28.5% | 49.8% |
| Currently Married | 54.0% | 27.6% | 48.0% |
| Married but Separated | 0.0% | 0.9% | 1.8% |
| Single Population | 46.0% | 71.5% | 50.2% |
| Never Married | 39.1% | 49.4% | 33.8% |
| Divorced | 5.2% | 16.2% | 10.8% |
| Widowed | 1.7% | 5.9% | 5.6% |
| space5 | | | |
| Household Size | 2.96 | 2.72 | 2.60 |
| Households | 69 | 997 | 124,010,992 |
| Family Households | 54 | 693 | 80,755,759 |
| Married couple, w/children | 22.2% | 11.5% | 30.5% |
| Married couple, no children | 68.5% | 29.0% | 42.9% |
| Non Family Households | 15 | 304 | 43,255,233 |
| Single householder, w/children | 9.3% | 45.5% | 15.8% |
| Single householder, no children | 0.0% | 14.0% | 10.8% |