| | Union Grove, WI | Sevierville, TN | United States |
| Population | 4,877 | 18,038 | 329,725,481 |
| Female Population | 48.4% | 50.3% | 50.5% |
| Male Population | 51.6% | 49.7% | 49.5% |
| Median Age | 37.4 | 39.7 | 38.4 |
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| Population - 2010 | 4,909 | 14,816 | 309,327,143 |
| Population - 2000 | 4,322 | 11,757 | 285,036,114 |
| Population - 1990 | 3,669 | 7,178 | 251,960,433 |
| Pop. 2000 to Now | 21.8% | 56.7% | 15.6% |
| Pop. 1990 to Now | 43.5% | 156.7% | 30.8% |
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| Population Density | 1,884.5 | 752.2 | 93.4 |
| Land Area | 2.6 | 24.0 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Union Grove, WI | Sevierville, TN | United States |
| Age 0 to 4 | 3.1% | 6.5% | 5.9% |
| Age 5 to 9 | 6.7% | 4.9% | 6.1% |
| Age 10 to 14 | 11.9% | 6.7% | 6.6% |
| Age 15 to 17 | 3.0% | 2.6% | 3.9% |
| Age 18 to 20 | 3.9% | 5.1% | 4.0% |
| Age 21 to 24 | 4.2% | 3.7% | 5.2% |
| Age 25 to 34 | 14.5% | 13.8% | 13.8% |
| Age 35 to 44 | 13.9% | 14.8% | 12.9% |
| Age 45 to 54 | 16.1% | 10.1% | 12.6% |
| Age 55 to 59 | 6.7% | 5.5% | 6.7% |
| Age 60 to 64 | 3.8% | 6.4% | 6.3% |
| Age 65 to 74 | 6.6% | 11.1% | 9.6% |
| Age 75 to 84 | 4.2% | 5.8% | 4.5% |
| Age 85 and over | 1.3% | 3.0% | 1.9% |
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| Race | | | |
| | Union Grove, WI | Sevierville, TN | United States |
| White | 87.2% | 74.8% | 59.4% |
| Black | 7.7% | 1.2% | 12.2% |
| Asian | 0.9% | 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 | 0.6% | 1.9% | 3.2% |
| Hispanic | 3.5% | 18.0% | 18.4% |
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| Marriage & Family | | | |
| | Union Grove, WI | Sevierville, TN | United States |
| Married Population | 46.6% | 48.6% | 49.8% |
| Currently Married | 45.8% | 46.2% | 48.0% |
| Married but Separated | 0.8% | 2.4% | 1.8% |
| Single Population | 53.4% | 51.4% | 50.2% |
| Never Married | 35.9% | 29.3% | 33.8% |
| Divorced | 12.8% | 13.7% | 10.8% |
| Widowed | 4.7% | 8.4% | 5.6% |
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| Household Size | 2.55 | 2.55 | 2.60 |
| Households | 1,862 | 6,766 | 124,010,992 |
| Family Households | 1,194 | 4,551 | 80,755,759 |
| Married couple, w/children | 26.3% | 21.7% | 30.5% |
| Married couple, no children | 44.4% | 46.3% | 42.9% |
| Non Family Households | 668 | 2,215 | 43,255,233 |
| Single householder, w/children | 24.4% | 19.6% | 15.8% |
| Single householder, no children | 4.9% | 12.5% | 10.8% |