| | Union Grove, WI | Flemingsburg, KY | United States |
| Population | 4,877 | 2,898 | 329,725,481 |
| Female Population | 48.4% | 49.0% | 50.5% |
| Male Population | 51.6% | 51.0% | 49.5% |
| Median Age | 37.4 | 31.5 | 38.4 |
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| Population - 2010 | 4,909 | 2,845 | 309,327,143 |
| Population - 2000 | 4,322 | 3,010 | 285,036,114 |
| Population - 1990 | 3,669 | 3,071 | 251,960,433 |
| Pop. 2000 to Now | 21.8% | -6.8% | 15.6% |
| Pop. 1990 to Now | 43.5% | -8.7% | 30.8% |
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| Population Density | 1,884.5 | 1,079.7 | 93.4 |
| Land Area | 2.6 | 2.7 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Union Grove, WI | Flemingsburg, KY | United States |
| Age 0 to 4 | 3.1% | 12.3% | 5.9% |
| Age 5 to 9 | 6.7% | 5.7% | 6.1% |
| Age 10 to 14 | 11.9% | 7.3% | 6.6% |
| Age 15 to 17 | 3.0% | 5.0% | 3.9% |
| Age 18 to 20 | 3.9% | 4.1% | 4.0% |
| Age 21 to 24 | 4.2% | 3.8% | 5.2% |
| Age 25 to 34 | 14.5% | 15.8% | 13.8% |
| Age 35 to 44 | 13.9% | 9.9% | 12.9% |
| Age 45 to 54 | 16.1% | 10.7% | 12.6% |
| Age 55 to 59 | 6.7% | 3.5% | 6.7% |
| Age 60 to 64 | 3.8% | 6.7% | 6.3% |
| Age 65 to 74 | 6.6% | 5.8% | 9.6% |
| Age 75 to 84 | 4.2% | 7.2% | 4.5% |
| Age 85 and over | 1.3% | 2.3% | 1.9% |
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| Race | | | |
| | Union Grove, WI | Flemingsburg, KY | United States |
| White | 87.2% | 87.9% | 59.4% |
| Black | 7.7% | 6.3% | 12.2% |
| Asian | 0.9% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.3% | 0.4% |
| Two or More Races | 0.6% | 0.9% | 3.2% |
| Hispanic | 3.5% | 4.6% | 18.4% |
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| Marriage & Family | | | |
| | Union Grove, WI | Flemingsburg, KY | United States |
| Married Population | 46.6% | 44.5% | 49.8% |
| Currently Married | 45.8% | 39.3% | 48.0% |
| Married but Separated | 0.8% | 5.2% | 1.8% |
| Single Population | 53.4% | 55.5% | 50.2% |
| Never Married | 35.9% | 29.0% | 33.8% |
| Divorced | 12.8% | 18.0% | 10.8% |
| Widowed | 4.7% | 8.6% | 5.6% |
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| Household Size | 2.55 | 2.54 | 2.60 |
| Households | 1,862 | 1,139 | 124,010,992 |
| Family Households | 1,194 | 683 | 80,755,759 |
| Married couple, w/children | 26.3% | 23.3% | 30.5% |
| Married couple, no children | 44.4% | 32.2% | 42.9% |
| Non Family Households | 668 | 456 | 43,255,233 |
| Single householder, w/children | 24.4% | 37.5% | 15.8% |
| Single householder, no children | 4.9% | 7.0% | 10.8% |