| | Indiantown, FL | Fellsmere, FL | United States |
| Population | 6,633 | 4,892 | 329,725,481 |
| Female Population | 47.8% | 44.3% | 50.5% |
| Male Population | 52.2% | 55.7% | 49.5% |
| Median Age | 31.4 | 32.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 6,490 | 5,168 | 309,327,143 |
| Population - 2000 | 5,588 | 3,813 | 285,036,114 |
| Population - 1990 | 4,794 | 2,179 | 251,960,433 |
| Pop. 2000 to Now | 29.8% | 50.9% | 15.6% |
| Pop. 1990 to Now | 51.3% | 164.0% | 30.8% |
| space4 | | | |
| Population Density | 473.2 | 85.0 | 93.4 |
| Land Area | 14.0 | 57.5 | 3,531,905.4 |
| Water Area | 0.3 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Indiantown, FL | Fellsmere, FL | United States |
| Age 0 to 4 | 4.8% | 9.7% | 5.9% |
| Age 5 to 9 | 3.6% | 13.5% | 6.1% |
| Age 10 to 14 | 12.0% | 3.1% | 6.6% |
| Age 15 to 17 | 6.2% | 3.5% | 3.9% |
| Age 18 to 20 | 8.4% | 2.9% | 4.0% |
| Age 21 to 24 | 7.6% | 7.0% | 5.2% |
| Age 25 to 34 | 11.3% | 14.1% | 13.8% |
| Age 35 to 44 | 11.6% | 18.7% | 12.9% |
| Age 45 to 54 | 7.2% | 9.1% | 12.6% |
| Age 55 to 59 | 5.4% | 6.1% | 6.7% |
| Age 60 to 64 | 3.7% | 6.4% | 6.3% |
| Age 65 to 74 | 10.1% | 4.0% | 9.6% |
| Age 75 to 84 | 6.3% | 1.9% | 4.5% |
| Age 85 and over | 1.9% | 0.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Indiantown, FL | Fellsmere, FL | United States |
| White | 16.7% | 12.1% | 59.4% |
| Black | 18.4% | 15.5% | 12.2% |
| Asian | 1.3% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.6% | 0.0% | 3.2% |
| Hispanic | 63.0% | 72.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Indiantown, FL | Fellsmere, FL | United States |
| Married Population | 31.7% | 36.6% | 49.8% |
| Currently Married | 27.0% | 36.6% | 48.0% |
| Married but Separated | 4.7% | 0.0% | 1.8% |
| Single Population | 68.3% | 63.4% | 50.2% |
| Never Married | 49.6% | 47.8% | 33.8% |
| Divorced | 11.9% | 13.3% | 10.8% |
| Widowed | 6.9% | 2.2% | 5.6% |
| space5 | | | |
| Household Size | 3.37 | 3.77 | 2.60 |
| Households | 1,964 | 1,270 | 124,010,992 |
| Family Households | 1,371 | 963 | 80,755,759 |
| Married couple, w/children | 17.9% | 30.1% | 30.5% |
| Married couple, no children | 25.1% | 29.8% | 42.9% |
| Non Family Households | 593 | 307 | 43,255,233 |
| Single householder, w/children | 34.3% | 22.0% | 15.8% |
| Single householder, no children | 22.7% | 18.1% | 10.8% |