| | Tazewell, TN | Seymour, TN | United States |
| Population | 2,541 | 15,633 | 329,725,481 |
| Female Population | 53.0% | 52.8% | 50.5% |
| Male Population | 47.0% | 47.2% | 49.5% |
| Median Age | 41.4 | 40.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 2,239 | 10,378 | 309,327,143 |
| Population - 2000 | 2,165 | 8,850 | 285,036,114 |
| Population - 1990 | 2,150 | 7,026 | 251,960,433 |
| Pop. 2000 to Now | 5.1% | 24.2% | 15.6% |
| Pop. 1990 to Now | 5.8% | 56.4% | 30.8% |
| space4 | | | |
| Population Density | 585.4 | 1,238.1 | 93.4 |
| Land Area | 4.3 | 12.6 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Tazewell, TN | Seymour, TN | United States |
| Age 0 to 4 | 5.4% | 6.4% | 5.9% |
| Age 5 to 9 | 4.1% | 4.5% | 6.1% |
| Age 10 to 14 | 7.2% | 8.7% | 6.6% |
| Age 15 to 17 | 3.6% | 4.6% | 3.9% |
| Age 18 to 20 | 2.6% | 3.1% | 4.0% |
| Age 21 to 24 | 6.5% | 4.5% | 5.2% |
| Age 25 to 34 | 12.0% | 11.1% | 13.8% |
| Age 35 to 44 | 12.8% | 11.5% | 12.9% |
| Age 45 to 54 | 12.2% | 15.6% | 12.6% |
| Age 55 to 59 | 5.3% | 8.6% | 6.7% |
| Age 60 to 64 | 6.5% | 5.1% | 6.3% |
| Age 65 to 74 | 12.4% | 9.7% | 9.6% |
| Age 75 to 84 | 4.6% | 4.6% | 4.5% |
| Age 85 and over | 5.0% | 1.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Tazewell, TN | Seymour, TN | United States |
| White | 91.9% | 95.1% | 59.4% |
| Black | 0.9% | 0.6% | 12.2% |
| Asian | 0.9% | 0.5% | 5.6% |
| Native American | 0.4% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 3.0% | 2.2% | 3.2% |
| Hispanic | 3.0% | 1.5% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Tazewell, TN | Seymour, TN | United States |
| Married Population | 43.1% | 58.6% | 49.8% |
| Currently Married | 42.0% | 57.2% | 48.0% |
| Married but Separated | 1.1% | 1.4% | 1.8% |
| Single Population | 56.9% | 41.4% | 50.2% |
| Never Married | 26.5% | 24.3% | 33.8% |
| Divorced | 20.1% | 8.4% | 10.8% |
| Widowed | 10.3% | 8.7% | 5.6% |
| space5 | | | |
| Household Size | 2.29 | 2.74 | 2.60 |
| Households | 1,072 | 5,697 | 124,010,992 |
| Family Households | 591 | 4,119 | 80,755,759 |
| Married couple, w/children | 33.5% | 35.3% | 30.5% |
| Married couple, no children | 35.4% | 53.0% | 42.9% |
| Non Family Households | 481 | 1,578 | 43,255,233 |
| Single householder, w/children | 14.9% | 6.4% | 15.8% |
| Single householder, no children | 16.2% | 5.4% | 10.8% |