| | Umatilla, FL | Hernando, FL | United States |
| Population | 3,646 | 9,530 | 329,725,481 |
| Female Population | 51.9% | 43.3% | 50.5% |
| Male Population | 48.1% | 56.7% | 49.5% |
| Median Age | 62.6 | 57.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,451 | 9,001 | 309,327,143 |
| Population - 2000 | 2,214 | 8,253 | 285,036,114 |
| Population - 1990 | 2,350 | 2,103 | 251,960,433 |
| Pop. 2000 to Now | 75.9% | 9.0% | 15.6% |
| Pop. 1990 to Now | 65.7% | 327.8% | 30.8% |
| space4 | | | |
| Population Density | 1,019.9 | 300.5 | 93.4 |
| Land Area | 3.6 | 31.7 | 3,531,905.4 |
| Water Area | 0.7 | 3.8 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Umatilla, FL | Hernando, FL | United States |
| Age 0 to 4 | 0.6% | 1.2% | 5.9% |
| Age 5 to 9 | 2.3% | 2.9% | 6.1% |
| Age 10 to 14 | 5.9% | 6.9% | 6.6% |
| Age 15 to 17 | 1.7% | 3.8% | 3.9% |
| Age 18 to 20 | 0.0% | 2.0% | 4.0% |
| Age 21 to 24 | 1.5% | 0.7% | 5.2% |
| Age 25 to 34 | 7.9% | 9.0% | 13.8% |
| Age 35 to 44 | 6.7% | 9.5% | 12.9% |
| Age 45 to 54 | 18.1% | 10.7% | 12.6% |
| Age 55 to 59 | 2.3% | 8.1% | 6.7% |
| Age 60 to 64 | 6.3% | 9.6% | 6.3% |
| Age 65 to 74 | 18.1% | 16.8% | 9.6% |
| Age 75 to 84 | 21.7% | 12.7% | 4.5% |
| Age 85 and over | 6.9% | 5.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Umatilla, FL | Hernando, FL | United States |
| White | 90.8% | 88.6% | 59.4% |
| Black | 0.1% | 3.2% | 12.2% |
| Asian | 0.0% | 4.1% | 5.6% |
| Native American | 0.0% | 0.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.1% | 1.8% | 3.2% |
| Hispanic | 9.0% | 1.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Umatilla, FL | Hernando, FL | United States |
| Married Population | 53.4% | 48.9% | 49.8% |
| Currently Married | 51.5% | 46.0% | 48.0% |
| Married but Separated | 1.9% | 3.0% | 1.8% |
| Single Population | 46.6% | 51.1% | 50.2% |
| Never Married | 18.1% | 21.8% | 33.8% |
| Divorced | 12.3% | 14.8% | 10.8% |
| Widowed | 16.1% | 14.4% | 5.6% |
| space5 | | | |
| Household Size | 1.94 | 2.16 | 2.60 |
| Households | 1,856 | 4,403 | 124,010,992 |
| Family Households | 973 | 2,603 | 80,755,759 |
| Married couple, w/children | 14.3% | 16.9% | 30.5% |
| Married couple, no children | 64.5% | 54.6% | 42.9% |
| Non Family Households | 883 | 1,800 | 43,255,233 |
| Single householder, w/children | 10.7% | 14.1% | 15.8% |
| Single householder, no children | 10.5% | 14.4% | 10.8% |