| | Long Beach, MS | Gautier, MS | United States |
| Population | 16,654 | 18,932 | 329,725,481 |
| Female Population | 52.3% | 52.0% | 50.5% |
| Male Population | 47.7% | 48.0% | 49.5% |
| Median Age | 41.7 | 38.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 14,834 | 18,546 | 309,327,143 |
| Population - 2000 | 17,320 | 11,681 | 285,036,114 |
| Population - 1990 | 15,804 | 10,088 | 251,960,433 |
| Pop. 2000 to Now | -6.9% | 57.3% | 15.6% |
| Pop. 1990 to Now | 2.0% | 82.2% | 30.8% |
| space4 | | | |
| Population Density | 1,623.7 | 625.7 | 93.4 |
| Land Area | 10.3 | 30.3 | 3,531,905.4 |
| Water Area | 0.4 | 1.9 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Long Beach, MS | Gautier, MS | United States |
| Age 0 to 4 | 5.1% | 5.5% | 5.9% |
| Age 5 to 9 | 5.8% | 5.6% | 6.1% |
| Age 10 to 14 | 7.6% | 8.9% | 6.6% |
| Age 15 to 17 | 5.4% | 3.6% | 3.9% |
| Age 18 to 20 | 4.0% | 1.6% | 4.0% |
| Age 21 to 24 | 4.3% | 4.1% | 5.2% |
| Age 25 to 34 | 8.9% | 13.9% | 13.8% |
| Age 35 to 44 | 12.4% | 14.5% | 12.9% |
| Age 45 to 54 | 11.7% | 14.0% | 12.6% |
| Age 55 to 59 | 6.9% | 8.0% | 6.7% |
| Age 60 to 64 | 7.4% | 4.1% | 6.3% |
| Age 65 to 74 | 15.3% | 9.8% | 9.6% |
| Age 75 to 84 | 3.5% | 5.8% | 4.5% |
| Age 85 and over | 1.8% | 0.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Long Beach, MS | Gautier, MS | United States |
| White | 84.3% | 52.9% | 59.4% |
| Black | 6.2% | 31.9% | 12.2% |
| Asian | 1.9% | 2.3% | 5.6% |
| Native American | 0.0% | 0.7% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 2.8% | 0.6% | 3.2% |
| Hispanic | 4.8% | 11.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Long Beach, MS | Gautier, MS | United States |
| Married Population | 50.0% | 53.6% | 49.8% |
| Currently Married | 47.3% | 50.0% | 48.0% |
| Married but Separated | 2.7% | 3.6% | 1.8% |
| Single Population | 50.0% | 46.4% | 50.2% |
| Never Married | 27.7% | 29.3% | 33.8% |
| Divorced | 14.1% | 10.9% | 10.8% |
| Widowed | 8.2% | 6.3% | 5.6% |
| space5 | | | |
| Household Size | 2.57 | 2.62 | 2.60 |
| Households | 6,458 | 7,216 | 124,010,992 |
| Family Households | 4,348 | 4,883 | 80,755,759 |
| Married couple, w/children | 28.2% | 30.3% | 30.5% |
| Married couple, no children | 42.5% | 41.2% | 42.9% |
| Non Family Households | 2,110 | 2,333 | 43,255,233 |
| Single householder, w/children | 18.6% | 17.4% | 15.8% |
| Single householder, no children | 10.7% | 11.1% | 10.8% |