| | Jefferson City, TN | Newport, TN | United States |
| Population | 8,173 | 6,845 | 329,725,481 |
| Female Population | 51.8% | 56.5% | 50.5% |
| Male Population | 48.2% | 43.5% | 49.5% |
| Median Age | 31.2 | 38.6 | 38.4 |
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| Population - 2010 | 8,242 | 6,900 | 309,327,143 |
| Population - 2000 | 7,760 | 7,242 | 285,036,114 |
| Population - 1990 | 5,494 | 7,123 | 251,960,433 |
| Pop. 2000 to Now | 6.1% | -4.8% | 15.6% |
| Pop. 1990 to Now | 49.9% | -3.2% | 30.8% |
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| Population Density | 1,239.8 | 1,238.0 | 93.4 |
| Land Area | 6.6 | 5.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Jefferson City, TN | Newport, TN | United States |
| Age 0 to 4 | 5.2% | 10.1% | 5.9% |
| Age 5 to 9 | 7.1% | 5.0% | 6.1% |
| Age 10 to 14 | 4.5% | 6.2% | 6.6% |
| Age 15 to 17 | 3.6% | 4.2% | 3.9% |
| Age 18 to 20 | 12.2% | 2.8% | 4.0% |
| Age 21 to 24 | 8.7% | 7.1% | 5.2% |
| Age 25 to 34 | 12.3% | 13.0% | 13.8% |
| Age 35 to 44 | 8.1% | 7.4% | 12.9% |
| Age 45 to 54 | 8.5% | 15.2% | 12.6% |
| Age 55 to 59 | 5.3% | 4.5% | 6.7% |
| Age 60 to 64 | 7.4% | 6.5% | 6.3% |
| Age 65 to 74 | 7.8% | 11.3% | 9.6% |
| Age 75 to 84 | 7.0% | 5.3% | 4.5% |
| Age 85 and over | 2.4% | 1.3% | 1.9% |
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| Race | | | |
| | Jefferson City, TN | Newport, TN | United States |
| White | 87.8% | 84.5% | 59.4% |
| Black | 4.2% | 1.0% | 12.2% |
| Asian | 0.4% | 2.5% | 5.6% |
| Native American | 0.0% | 0.4% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.5% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.5% | 4.4% | 3.2% |
| Hispanic | 7.1% | 6.7% | 18.4% |
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| Marriage & Family | | | |
| | Jefferson City, TN | Newport, TN | United States |
| Married Population | 40.6% | 46.4% | 49.8% |
| Currently Married | 39.3% | 44.9% | 48.0% |
| Married but Separated | 1.3% | 1.4% | 1.8% |
| Single Population | 59.4% | 53.7% | 50.2% |
| Never Married | 41.7% | 24.9% | 33.8% |
| Divorced | 11.9% | 17.2% | 10.8% |
| Widowed | 5.9% | 11.5% | 5.6% |
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| Household Size | 2.48 | 2.53 | 2.60 |
| Households | 2,839 | 2,611 | 124,010,992 |
| Family Households | 1,783 | 1,688 | 80,755,759 |
| Married couple, w/children | 33.7% | 24.1% | 30.5% |
| Married couple, no children | 33.6% | 39.1% | 42.9% |
| Non Family Households | 1,056 | 923 | 43,255,233 |
| Single householder, w/children | 20.8% | 20.9% | 15.8% |
| Single householder, no children | 11.9% | 15.9% | 10.8% |