| | Harrison, TN | Palatka, FL | United States |
| Population | 8,383 | 10,399 | 329,725,481 |
| Female Population | 50.0% | 51.6% | 50.5% |
| Male Population | 50.0% | 48.4% | 49.5% |
| Median Age | 42.7 | 37.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 7,917 | 10,583 | 309,327,143 |
| Population - 2000 | 7,630 | 10,033 | 285,036,114 |
| Population - 1990 | 7,191 | 10,201 | 251,960,433 |
| Pop. 2000 to Now | 2.2% | 4.2% | 15.6% |
| Pop. 1990 to Now | 8.4% | 2.5% | 30.8% |
| space4 | | | |
| Population Density | 1,297.3 | 1,077.7 | 93.4 |
| Land Area | 6.5 | 9.6 | 3,531,905.4 |
| Water Area | 1.8 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Harrison, TN | Palatka, FL | United States |
| Age 0 to 4 | 6.4% | 8.4% | 5.9% |
| Age 5 to 9 | 4.4% | 5.5% | 6.1% |
| Age 10 to 14 | 7.4% | 8.9% | 6.6% |
| Age 15 to 17 | 1.3% | 2.2% | 3.9% |
| Age 18 to 20 | 1.2% | 2.0% | 4.0% |
| Age 21 to 24 | 3.1% | 6.0% | 5.2% |
| Age 25 to 34 | 17.5% | 14.4% | 13.8% |
| Age 35 to 44 | 11.2% | 7.5% | 12.9% |
| Age 45 to 54 | 14.9% | 10.1% | 12.6% |
| Age 55 to 59 | 8.2% | 7.9% | 6.7% |
| Age 60 to 64 | 7.9% | 5.1% | 6.3% |
| Age 65 to 74 | 10.1% | 11.2% | 9.6% |
| Age 75 to 84 | 3.6% | 8.1% | 4.5% |
| Age 85 and over | 2.7% | 2.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Harrison, TN | Palatka, FL | United States |
| White | 76.2% | 50.1% | 59.4% |
| Black | 20.1% | 39.7% | 12.2% |
| Asian | 1.5% | 1.4% | 5.6% |
| Native American | 0.2% | 0.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.7% | 2.9% | 3.2% |
| Hispanic | 1.3% | 5.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Harrison, TN | Palatka, FL | United States |
| Married Population | 59.3% | 27.2% | 49.8% |
| Currently Married | 57.4% | 22.6% | 48.0% |
| Married but Separated | 1.9% | 4.6% | 1.8% |
| Single Population | 40.7% | 72.8% | 50.2% |
| Never Married | 26.4% | 45.9% | 33.8% |
| Divorced | 10.2% | 14.6% | 10.8% |
| Widowed | 4.1% | 12.2% | 5.6% |
| space5 | | | |
| Household Size | 2.49 | 2.32 | 2.60 |
| Households | 3,360 | 4,267 | 124,010,992 |
| Family Households | 2,478 | 2,108 | 80,755,759 |
| Married couple, w/children | 23.4% | 12.6% | 30.5% |
| Married couple, no children | 56.5% | 23.2% | 42.9% |
| Non Family Households | 882 | 2,159 | 43,255,233 |
| Single householder, w/children | 9.8% | 38.7% | 15.8% |
| Single householder, no children | 10.4% | 25.6% | 10.8% |