| | Columbia, LA | Palatka, FL | United States |
| Population | 377 | 10,399 | 329,725,481 |
| Female Population | 42.7% | 51.6% | 50.5% |
| Male Population | 57.3% | 48.4% | 49.5% |
| Median Age | 35.4 | 37.4 | 38.4 |
| space3 | | | |
| Population - 2010 | 390 | 10,583 | 309,327,143 |
| Population - 2000 | 477 | 10,033 | 285,036,114 |
| Population - 1990 | 386 | 10,201 | 251,960,433 |
| Pop. 2000 to Now | -23.7% | 4.2% | 15.6% |
| Pop. 1990 to Now | -5.7% | 2.5% | 30.8% |
| space4 | | | |
| Population Density | 498.0 | 1,077.7 | 93.4 |
| Land Area | 0.8 | 9.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Columbia, LA | Palatka, FL | United States |
| Age 0 to 4 | 8.0% | 8.4% | 5.9% |
| Age 5 to 9 | 5.6% | 5.5% | 6.1% |
| Age 10 to 14 | 1.6% | 8.9% | 6.6% |
| Age 15 to 17 | 10.3% | 2.2% | 3.9% |
| Age 18 to 20 | 4.8% | 2.0% | 4.0% |
| Age 21 to 24 | 0.0% | 6.0% | 5.2% |
| Age 25 to 34 | 18.6% | 14.4% | 13.8% |
| Age 35 to 44 | 19.1% | 7.5% | 12.9% |
| Age 45 to 54 | 10.9% | 10.1% | 12.6% |
| Age 55 to 59 | 2.1% | 7.9% | 6.7% |
| Age 60 to 64 | 7.2% | 5.1% | 6.3% |
| Age 65 to 74 | 9.0% | 11.2% | 9.6% |
| Age 75 to 84 | 1.3% | 8.1% | 4.5% |
| Age 85 and over | 1.6% | 2.7% | 1.9% |
| space1 | | | |
| Race | | | |
| | Columbia, LA | Palatka, FL | United States |
| White | 68.7% | 50.1% | 59.4% |
| Black | 28.9% | 39.7% | 12.2% |
| Asian | 0.0% | 1.4% | 5.6% |
| Native American | 0.0% | 0.8% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.2% | 0.2% |
| Other | 1.1% | 0.0% | 0.4% |
| Two or More Races | 0.5% | 2.9% | 3.2% |
| Hispanic | 0.8% | 5.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Columbia, LA | Palatka, FL | United States |
| Married Population | 41.6% | 27.2% | 49.8% |
| Currently Married | 41.3% | 22.6% | 48.0% |
| Married but Separated | 0.3% | 4.6% | 1.8% |
| Single Population | 58.4% | 72.8% | 50.2% |
| Never Married | 42.8% | 45.9% | 33.8% |
| Divorced | 9.4% | 14.6% | 10.8% |
| Widowed | 6.3% | 12.2% | 5.6% |
| space5 | | | |
| Household Size | 2.69 | 2.32 | 2.60 |
| Households | 123 | 4,267 | 124,010,992 |
| Family Households | 89 | 2,108 | 80,755,759 |
| Married couple, w/children | 22.5% | 12.6% | 30.5% |
| Married couple, no children | 43.8% | 23.2% | 42.9% |
| Non Family Households | 34 | 2,159 | 43,255,233 |
| Single householder, w/children | 32.6% | 38.7% | 15.8% |
| Single householder, no children | 1.1% | 25.6% | 10.8% |