| | Jellico, TN | Nashville, IN | United States |
| Population | 1,983 | 1,554 | 329,725,481 |
| Female Population | 48.8% | 57.9% | 50.5% |
| Male Population | 51.2% | 42.2% | 49.5% |
| Median Age | 51.8 | 59.3 | 38.4 |
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| Population - 2010 | 2,325 | 1,108 | 309,327,143 |
| Population - 2000 | 2,448 | 825 | 285,036,114 |
| Population - 1990 | 2,447 | 873 | 251,960,433 |
| Pop. 2000 to Now | -12.9% | 33.0% | 15.6% |
| Pop. 1990 to Now | -12.9% | 25.7% | 30.8% |
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| Population Density | 318.9 | 1,021.7 | 93.4 |
| Land Area | 6.2 | 1.5 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Jellico, TN | Nashville, IN | United States |
| Age 0 to 4 | 5.1% | 3.9% | 5.9% |
| Age 5 to 9 | 3.1% | 1.7% | 6.1% |
| Age 10 to 14 | 1.1% | 1.6% | 6.6% |
| Age 15 to 17 | 4.1% | 1.0% | 3.9% |
| Age 18 to 20 | 0.7% | 1.2% | 4.0% |
| Age 21 to 24 | 3.1% | 4.6% | 5.2% |
| Age 25 to 34 | 14.7% | 8.5% | 13.8% |
| Age 35 to 44 | 10.3% | 3.4% | 12.9% |
| Age 45 to 54 | 12.6% | 19.2% | 12.6% |
| Age 55 to 59 | 6.8% | 6.0% | 6.7% |
| Age 60 to 64 | 9.1% | 9.0% | 6.3% |
| Age 65 to 74 | 10.9% | 16.0% | 9.6% |
| Age 75 to 84 | 15.7% | 14.9% | 4.5% |
| Age 85 and over | 2.8% | 9.0% | 1.9% |
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| Race | | | |
| | Jellico, TN | Nashville, IN | United States |
| White | 91.5% | 97.3% | 59.4% |
| Black | 2.6% | 0.5% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 5.9% | 1.4% | 3.2% |
| Hispanic | 0.0% | 0.6% | 18.4% |
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| Marriage & Family | | | |
| | Jellico, TN | Nashville, IN | United States |
| Married Population | 64.7% | 60.1% | 49.8% |
| Currently Married | 56.8% | 58.9% | 48.0% |
| Married but Separated | 7.9% | 1.2% | 1.8% |
| Single Population | 35.3% | 39.9% | 50.2% |
| Never Married | 14.5% | 13.3% | 33.8% |
| Divorced | 11.8% | 13.5% | 10.8% |
| Widowed | 9.0% | 13.1% | 5.6% |
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| Household Size | 2.13 | 1.87 | 2.60 |
| Households | 884 | 768 | 124,010,992 |
| Family Households | 545 | 467 | 80,755,759 |
| Married couple, w/children | 22.9% | 13.5% | 30.5% |
| Married couple, no children | 64.6% | 70.7% | 42.9% |
| Non Family Households | 339 | 301 | 43,255,233 |
| Single householder, w/children | 2.8% | 8.8% | 15.8% |
| Single householder, no children | 9.7% | 7.1% | 10.8% |