| | Pretty Bayou, FL | Upper Grand Lagoon, FL | United States |
| Population | 2,497 | 18,140 | 329,725,481 |
| Female Population | 54.2% | 48.5% | 50.5% |
| Male Population | 45.9% | 51.5% | 49.5% |
| Median Age | 52.2 | 39.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,664 | 12,483 | 309,327,143 |
| Population - 2000 | 3,519 | 10,889 | 285,036,114 |
| Population - 1990 | 3,839 | 7,855 | 251,960,433 |
| Pop. 2000 to Now | -7.3% | 39.4% | 15.6% |
| Pop. 1990 to Now | -15.1% | 93.2% | 30.8% |
| space4 | | | |
| Population Density | 1,508.8 | 2,241.2 | 93.4 |
| Land Area | 1.7 | 8.1 | 3,531,905.4 |
| Water Area | 0.2 | 7.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Pretty Bayou, FL | Upper Grand Lagoon, FL | United States |
| Age 0 to 4 | 3.7% | 5.7% | 5.9% |
| Age 5 to 9 | 2.8% | 7.1% | 6.1% |
| Age 10 to 14 | 5.8% | 4.9% | 6.6% |
| Age 15 to 17 | 2.0% | 3.2% | 3.9% |
| Age 18 to 20 | 0.8% | 2.3% | 4.0% |
| Age 21 to 24 | 4.0% | 3.7% | 5.2% |
| Age 25 to 34 | 8.4% | 15.2% | 13.8% |
| Age 35 to 44 | 11.8% | 12.1% | 12.9% |
| Age 45 to 54 | 15.1% | 12.3% | 12.6% |
| Age 55 to 59 | 6.2% | 8.2% | 6.7% |
| Age 60 to 64 | 8.1% | 7.2% | 6.3% |
| Age 65 to 74 | 16.0% | 11.5% | 9.6% |
| Age 75 to 84 | 10.5% | 4.9% | 4.5% |
| Age 85 and over | 4.8% | 1.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Pretty Bayou, FL | Upper Grand Lagoon, FL | United States |
| White | 85.1% | 83.0% | 59.4% |
| Black | 5.0% | 3.3% | 12.2% |
| Asian | 2.4% | 3.7% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.8% | 0.2% | 0.4% |
| Two or More Races | 3.2% | 4.0% | 3.2% |
| Hispanic | 3.4% | 5.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Pretty Bayou, FL | Upper Grand Lagoon, FL | United States |
| Married Population | 63.6% | 57.4% | 49.8% |
| Currently Married | 63.6% | 55.4% | 48.0% |
| Married but Separated | 0.0% | 2.0% | 1.8% |
| Single Population | 36.4% | 42.6% | 50.2% |
| Never Married | 17.2% | 26.3% | 33.8% |
| Divorced | 9.8% | 11.7% | 10.8% |
| Widowed | 9.5% | 4.6% | 5.6% |
| space5 | | | |
| Household Size | 2.14 | 2.41 | 2.60 |
| Households | 1,121 | 7,475 | 124,010,992 |
| Family Households | 684 | 4,856 | 80,755,759 |
| Married couple, w/children | 26.6% | 30.1% | 30.5% |
| Married couple, no children | 59.5% | 50.5% | 42.9% |
| Non Family Households | 437 | 2,619 | 43,255,233 |
| Single householder, w/children | 3.2% | 14.2% | 15.8% |
| Single householder, no children | 10.7% | 5.2% | 10.8% |