| | Lake Hart, FL | Doctor Phillips, FL | United States |
| Population | 385 | 12,368 | 329,725,481 |
| Female Population | 89.9% | 51.3% | 50.5% |
| Male Population | 10.1% | 48.7% | 49.5% |
| Median Age | 28.7 | 43.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 411 | 11,226 | 309,327,143 |
| Population - 2000 | 557 | 9,548 | 285,036,114 |
| Population - 1990 | 84 | 7,963 | 251,960,433 |
| Pop. 2000 to Now | -36.3% | 30.0% | 15.6% |
| Pop. 1990 to Now | 322.6% | 55.9% | 30.8% |
| space4 | | | |
| Population Density | 338.6 | 3,895.4 | 93.4 |
| Land Area | 1.1 | 3.2 | 3,531,905.4 |
| Water Area | 0.6 | 1.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Lake Hart, FL | Doctor Phillips, FL | United States |
| Age 0 to 4 | 0.0% | 2.9% | 5.9% |
| Age 5 to 9 | 6.5% | 4.8% | 6.1% |
| Age 10 to 14 | 0.0% | 4.5% | 6.6% |
| Age 15 to 17 | 0.0% | 1.9% | 3.9% |
| Age 18 to 20 | 0.0% | 1.8% | 4.0% |
| Age 21 to 24 | 8.1% | 6.5% | 5.2% |
| Age 25 to 34 | 62.6% | 17.4% | 13.8% |
| Age 35 to 44 | 6.8% | 12.1% | 12.9% |
| Age 45 to 54 | 6.5% | 11.0% | 12.6% |
| Age 55 to 59 | 0.0% | 7.6% | 6.7% |
| Age 60 to 64 | 0.0% | 7.3% | 6.3% |
| Age 65 to 74 | 0.0% | 12.6% | 9.6% |
| Age 75 to 84 | 9.6% | 7.9% | 4.5% |
| Age 85 and over | 0.0% | 1.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Lake Hart, FL | Doctor Phillips, FL | United States |
| White | 37.7% | 55.4% | 59.4% |
| Black | 0.0% | 10.6% | 12.2% |
| Asian | 17.7% | 11.8% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 2.1% | 0.4% |
| Two or More Races | 7.3% | 7.0% | 3.2% |
| Hispanic | 37.4% | 13.2% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Lake Hart, FL | Doctor Phillips, FL | United States |
| Married Population | 0.0% | 55.6% | 49.8% |
| Currently Married | 0.0% | 55.0% | 48.0% |
| Married but Separated | 0.0% | 0.6% | 1.8% |
| Single Population | 100.0% | 44.4% | 50.2% |
| Never Married | 56.7% | 29.8% | 33.8% |
| Divorced | 33.1% | 9.8% | 10.8% |
| Widowed | 10.3% | 4.8% | 5.6% |
| space5 | | | |
| Household Size | 1.70 | 2.69 | 2.60 |
| Households | 226 | 4,594 | 124,010,992 |
| Family Households | 26 | 3,247 | 80,755,759 |
| Married couple, w/children | 0.0% | 24.2% | 30.5% |
| Married couple, no children | 0.0% | 57.8% | 42.9% |
| Non Family Households | 200 | 1,347 | 43,255,233 |
| Single householder, w/children | 100.0% | 6.9% | 15.8% |
| Single householder, no children | 0.0% | 11.1% | 10.8% |