| | Jefferson City, TN | Gautier, MS | United States |
| Population | 8,173 | 18,932 | 329,725,481 |
| Female Population | 51.8% | 52.0% | 50.5% |
| Male Population | 48.2% | 48.0% | 49.5% |
| Median Age | 31.2 | 38.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 8,242 | 18,546 | 309,327,143 |
| Population - 2000 | 7,760 | 11,681 | 285,036,114 |
| Population - 1990 | 5,494 | 10,088 | 251,960,433 |
| Pop. 2000 to Now | 6.1% | 57.3% | 15.6% |
| Pop. 1990 to Now | 49.9% | 82.2% | 30.8% |
| space4 | | | |
| Population Density | 1,239.8 | 625.7 | 93.4 |
| Land Area | 6.6 | 30.3 | 3,531,905.4 |
| Water Area | 0.0 | 1.9 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Jefferson City, TN | Gautier, MS | United States |
| Age 0 to 4 | 5.2% | 5.5% | 5.9% |
| Age 5 to 9 | 7.1% | 5.6% | 6.1% |
| Age 10 to 14 | 4.5% | 8.9% | 6.6% |
| Age 15 to 17 | 3.6% | 3.6% | 3.9% |
| Age 18 to 20 | 12.2% | 1.6% | 4.0% |
| Age 21 to 24 | 8.7% | 4.1% | 5.2% |
| Age 25 to 34 | 12.3% | 13.9% | 13.8% |
| Age 35 to 44 | 8.1% | 14.5% | 12.9% |
| Age 45 to 54 | 8.5% | 14.0% | 12.6% |
| Age 55 to 59 | 5.3% | 8.0% | 6.7% |
| Age 60 to 64 | 7.4% | 4.1% | 6.3% |
| Age 65 to 74 | 7.8% | 9.8% | 9.6% |
| Age 75 to 84 | 7.0% | 5.8% | 4.5% |
| Age 85 and over | 2.4% | 0.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Jefferson City, TN | Gautier, MS | United States |
| White | 87.8% | 52.9% | 59.4% |
| Black | 4.2% | 31.9% | 12.2% |
| Asian | 0.4% | 2.3% | 5.6% |
| Native American | 0.0% | 0.7% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 0.5% | 0.6% | 3.2% |
| Hispanic | 7.1% | 11.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Jefferson City, TN | Gautier, MS | United States |
| Married Population | 40.6% | 53.6% | 49.8% |
| Currently Married | 39.3% | 50.0% | 48.0% |
| Married but Separated | 1.3% | 3.6% | 1.8% |
| Single Population | 59.4% | 46.4% | 50.2% |
| Never Married | 41.7% | 29.3% | 33.8% |
| Divorced | 11.9% | 10.9% | 10.8% |
| Widowed | 5.9% | 6.3% | 5.6% |
| space5 | | | |
| Household Size | 2.48 | 2.62 | 2.60 |
| Households | 2,839 | 7,216 | 124,010,992 |
| Family Households | 1,783 | 4,883 | 80,755,759 |
| Married couple, w/children | 33.7% | 30.3% | 30.5% |
| Married couple, no children | 33.6% | 41.2% | 42.9% |
| Non Family Households | 1,056 | 2,333 | 43,255,233 |
| Single householder, w/children | 20.8% | 17.4% | 15.8% |
| Single householder, no children | 11.9% | 11.1% | 10.8% |