| | St. George Island, MD | Fort Payne, AL | United States |
| Population | 516 | 14,730 | 329,725,481 |
| Female Population | 52.3% | 51.8% | 50.5% |
| Male Population | 47.7% | 48.2% | 49.5% |
| Median Age | 35.9 | 39.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 329 | 14,069 | 309,327,143 |
| Population - 2000 | 247 | 12,938 | 285,036,114 |
| Population - 1990 | 274 | 11,838 | 251,960,433 |
| Pop. 2000 to Now | 80.6% | 8.5% | 15.6% |
| Pop. 1990 to Now | 62.8% | 18.6% | 30.8% |
| space4 | | | |
| Population Density | 655.7 | 262.2 | 93.4 |
| Land Area | 0.8 | 56.2 | 3,531,905.4 |
| Water Area | 0.1 | 0.4 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | St. George Island, MD | Fort Payne, AL | United States |
| Age 0 to 4 | 6.6% | 6.9% | 5.9% |
| Age 5 to 9 | 19.0% | 6.8% | 6.1% |
| Age 10 to 14 | 7.9% | 8.0% | 6.6% |
| Age 15 to 17 | 2.3% | 2.9% | 3.9% |
| Age 18 to 20 | 0.0% | 2.7% | 4.0% |
| Age 21 to 24 | 0.0% | 6.0% | 5.2% |
| Age 25 to 34 | 3.5% | 10.1% | 13.8% |
| Age 35 to 44 | 25.0% | 13.1% | 12.9% |
| Age 45 to 54 | 3.1% | 10.7% | 12.6% |
| Age 55 to 59 | 15.1% | 8.2% | 6.7% |
| Age 60 to 64 | 10.3% | 6.6% | 6.3% |
| Age 65 to 74 | 0.0% | 11.3% | 9.6% |
| Age 75 to 84 | 0.0% | 5.2% | 4.5% |
| Age 85 and over | 7.2% | 1.5% | 1.9% |
| space1 | | | |
| Race | | | |
| | St. George Island, MD | Fort Payne, AL | United States |
| White | 87.2% | 76.1% | 59.4% |
| Black | 0.0% | 2.9% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 1.4% | 0.4% |
| Two or More Races | 12.8% | 1.5% | 3.2% |
| Hispanic | 0.0% | 17.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | St. George Island, MD | Fort Payne, AL | United States |
| Married Population | 25.4% | 52.3% | 49.8% |
| Currently Married | 20.7% | 48.8% | 48.0% |
| Married but Separated | 4.7% | 3.5% | 1.8% |
| Single Population | 74.6% | 47.7% | 50.2% |
| Never Married | 36.7% | 22.9% | 33.8% |
| Divorced | 27.1% | 18.3% | 10.8% |
| Widowed | 10.8% | 6.6% | 5.6% |
| space5 | | | |
| Household Size | 4.23 | 2.58 | 2.60 |
| Households | 122 | 5,536 | 124,010,992 |
| Family Households | 83 | 3,501 | 80,755,759 |
| Married couple, w/children | 12.0% | 32.6% | 30.5% |
| Married couple, no children | 0.0% | 41.7% | 42.9% |
| Non Family Households | 39 | 2,035 | 43,255,233 |
| Single householder, w/children | 88.0% | 15.2% | 15.8% |
| Single householder, no children | 0.0% | 10.4% | 10.8% |