| | Southside, AL | Foley, AL | United States |
| Population | 9,253 | 20,170 | 329,725,481 |
| Female Population | 52.1% | 54.1% | 50.5% |
| Male Population | 47.9% | 45.9% | 49.5% |
| Median Age | 41 | 52.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 8,453 | 15,434 | 309,327,143 |
| Population - 2000 | 7,036 | 7,590 | 285,036,114 |
| Population - 1990 | 5,580 | 4,937 | 251,960,433 |
| Pop. 2000 to Now | 28.6% | 182.6% | 15.6% |
| Pop. 1990 to Now | 62.1% | 334.4% | 30.8% |
| space4 | | | |
| Population Density | 487.2 | 626.2 | 93.4 |
| Land Area | 19.0 | 32.2 | 3,531,905.4 |
| Water Area | 0.2 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Southside, AL | Foley, AL | United States |
| Age 0 to 4 | 7.9% | 2.1% | 5.9% |
| Age 5 to 9 | 6.4% | 2.7% | 6.1% |
| Age 10 to 14 | 7.0% | 5.5% | 6.6% |
| Age 15 to 17 | 2.5% | 4.5% | 3.9% |
| Age 18 to 20 | 1.4% | 2.4% | 4.0% |
| Age 21 to 24 | 4.0% | 3.6% | 5.2% |
| Age 25 to 34 | 15.1% | 12.4% | 13.8% |
| Age 35 to 44 | 14.1% | 8.0% | 12.9% |
| Age 45 to 54 | 8.8% | 11.4% | 12.6% |
| Age 55 to 59 | 6.3% | 8.0% | 6.7% |
| Age 60 to 64 | 6.2% | 8.9% | 6.3% |
| Age 65 to 74 | 12.8% | 15.3% | 9.6% |
| Age 75 to 84 | 5.5% | 11.1% | 4.5% |
| Age 85 and over | 2.0% | 4.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Southside, AL | Foley, AL | United States |
| White | 93.9% | 78.5% | 59.4% |
| Black | 1.2% | 8.1% | 12.2% |
| Asian | 0.0% | 1.1% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 1.7% | 2.8% | 0.4% |
| Two or More Races | 1.2% | 0.9% | 3.2% |
| Hispanic | 1.9% | 8.7% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Southside, AL | Foley, AL | United States |
| Married Population | 57.0% | 48.7% | 49.8% |
| Currently Married | 55.4% | 47.5% | 48.0% |
| Married but Separated | 1.6% | 1.1% | 1.8% |
| Single Population | 43.0% | 51.3% | 50.2% |
| Never Married | 22.2% | 26.5% | 33.8% |
| Divorced | 13.3% | 13.6% | 10.8% |
| Widowed | 7.5% | 11.2% | 5.6% |
| space5 | | | |
| Household Size | 3.07 | 2.16 | 2.60 |
| Households | 2,976 | 9,243 | 124,010,992 |
| Family Households | 2,318 | 5,249 | 80,755,759 |
| Married couple, w/children | 30.8% | 18.3% | 30.5% |
| Married couple, no children | 46.5% | 61.8% | 42.9% |
| Non Family Households | 658 | 3,994 | 43,255,233 |
| Single householder, w/children | 7.1% | 6.0% | 15.8% |
| Single householder, no children | 15.5% | 13.9% | 10.8% |