| | Dover, FL | Mayo, FL | United States |
| Population | 3,444 | 1,730 | 329,725,481 |
| Female Population | 45.3% | 36.5% | 50.5% |
| Male Population | 54.7% | 63.5% | 49.5% |
| Median Age | 37.1 | 32.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,516 | 1,233 | 309,327,143 |
| Population - 2000 | 2,798 | 988 | 285,036,114 |
| Population - 1990 | 2,606 | 917 | 251,960,433 |
| Pop. 2000 to Now | 36.2% | 30.5% | 15.6% |
| Pop. 1990 to Now | 46.3% | 40.6% | 30.8% |
| space4 | | | |
| Population Density | 1,324.1 | 1,948.2 | 93.4 |
| Land Area | 2.6 | 0.9 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Dover, FL | Mayo, FL | United States |
| Age 0 to 4 | 6.6% | 4.1% | 5.9% |
| Age 5 to 9 | 7.0% | 13.1% | 6.1% |
| Age 10 to 14 | 8.3% | 1.8% | 6.6% |
| Age 15 to 17 | 2.3% | 8.1% | 3.9% |
| Age 18 to 20 | 3.2% | 0.0% | 4.0% |
| Age 21 to 24 | 3.4% | 11.3% | 5.2% |
| Age 25 to 34 | 17.2% | 13.4% | 13.8% |
| Age 35 to 44 | 15.2% | 11.5% | 12.9% |
| Age 45 to 54 | 10.8% | 15.8% | 12.6% |
| Age 55 to 59 | 6.2% | 7.0% | 6.7% |
| Age 60 to 64 | 10.3% | 2.6% | 6.3% |
| Age 65 to 74 | 6.9% | 5.6% | 9.6% |
| Age 75 to 84 | 1.7% | 3.6% | 4.5% |
| Age 85 and over | 0.9% | 2.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Dover, FL | Mayo, FL | United States |
| White | 31.5% | 33.6% | 59.4% |
| Black | 2.1% | 48.8% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 1.3% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.7% | 0.9% | 3.2% |
| Hispanic | 64.4% | 16.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Dover, FL | Mayo, FL | United States |
| Married Population | 52.8% | 23.6% | 49.8% |
| Currently Married | 44.6% | 21.4% | 48.0% |
| Married but Separated | 8.2% | 2.2% | 1.8% |
| Single Population | 47.2% | 76.4% | 50.2% |
| Never Married | 28.0% | 41.9% | 33.8% |
| Divorced | 8.9% | 29.3% | 10.8% |
| Widowed | 10.4% | 5.2% | 5.6% |
| space5 | | | |
| Household Size | 2.92 | 3.66 | 2.60 |
| Households | 1,118 | 453 | 124,010,992 |
| Family Households | 687 | 233 | 80,755,759 |
| Married couple, w/children | 34.5% | 44.2% | 30.5% |
| Married couple, no children | 42.1% | 12.9% | 42.9% |
| Non Family Households | 431 | 220 | 43,255,233 |
| Single householder, w/children | 15.4% | 34.3% | 15.8% |
| Single householder, no children | 8.0% | 8.6% | 10.8% |