| | Clifton, IL | Sevierville, TN | United States |
| Population | 1,283 | 18,038 | 329,725,481 |
| Female Population | 48.9% | 50.3% | 50.5% |
| Male Population | 51.1% | 49.7% | 49.5% |
| Median Age | 38.6 | 39.7 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,466 | 14,816 | 309,327,143 |
| Population - 2000 | 1,317 | 11,757 | 285,036,114 |
| Population - 1990 | 1,347 | 7,178 | 251,960,433 |
| Pop. 2000 to Now | -1.5% | 56.7% | 15.6% |
| Pop. 1990 to Now | -3.7% | 156.7% | 30.8% |
| space4 | | | |
| Population Density | 1,456.3 | 752.2 | 93.4 |
| Land Area | 0.9 | 24.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Clifton, IL | Sevierville, TN | United States |
| Age 0 to 4 | 4.9% | 6.5% | 5.9% |
| Age 5 to 9 | 4.6% | 4.9% | 6.1% |
| Age 10 to 14 | 9.3% | 6.7% | 6.6% |
| Age 15 to 17 | 4.5% | 2.6% | 3.9% |
| Age 18 to 20 | 3.3% | 5.1% | 4.0% |
| Age 21 to 24 | 2.8% | 3.7% | 5.2% |
| Age 25 to 34 | 16.8% | 13.8% | 13.8% |
| Age 35 to 44 | 14.0% | 14.8% | 12.9% |
| Age 45 to 54 | 13.6% | 10.1% | 12.6% |
| Age 55 to 59 | 5.5% | 5.5% | 6.7% |
| Age 60 to 64 | 7.2% | 6.4% | 6.3% |
| Age 65 to 74 | 7.8% | 11.1% | 9.6% |
| Age 75 to 84 | 4.7% | 5.8% | 4.5% |
| Age 85 and over | 1.1% | 3.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Clifton, IL | Sevierville, TN | United States |
| White | 93.4% | 74.8% | 59.4% |
| Black | 0.0% | 1.2% | 12.2% |
| Asian | 0.8% | 2.7% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 1.3% | 0.4% |
| Two or More Races | 2.3% | 1.9% | 3.2% |
| Hispanic | 3.6% | 18.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Clifton, IL | Sevierville, TN | United States |
| Married Population | 57.1% | 48.6% | 49.8% |
| Currently Married | 56.3% | 46.2% | 48.0% |
| Married but Separated | 0.8% | 2.4% | 1.8% |
| Single Population | 42.9% | 51.4% | 50.2% |
| Never Married | 29.1% | 29.3% | 33.8% |
| Divorced | 9.5% | 13.7% | 10.8% |
| Widowed | 4.3% | 8.4% | 5.6% |
| space5 | | | |
| Household Size | 2.40 | 2.55 | 2.60 |
| Households | 533 | 6,766 | 124,010,992 |
| Family Households | 339 | 4,551 | 80,755,759 |
| Married couple, w/children | 35.4% | 21.7% | 30.5% |
| Married couple, no children | 49.3% | 46.3% | 42.9% |
| Non Family Households | 194 | 2,215 | 43,255,233 |
| Single householder, w/children | 10.6% | 19.6% | 15.8% |
| Single householder, no children | 4.7% | 12.5% | 10.8% |