| | Versailles, IN | Decatur, TN | United States |
| Population | 1,675 | 1,841 | 329,725,481 |
| Female Population | 49.4% | 53.5% | 50.5% |
| Male Population | 50.6% | 46.6% | 49.5% |
| Median Age | 39.4 | 40.2 | 38.4 |
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| Population - 2010 | 2,132 | 1,645 | 309,327,143 |
| Population - 2000 | 1,784 | 1,395 | 285,036,114 |
| Population - 1990 | 1,791 | 1,361 | 251,960,433 |
| Pop. 2000 to Now | 17.1% | 19.2% | 15.6% |
| Pop. 1990 to Now | 16.6% | 22.2% | 30.8% |
| space4 | | | |
| Population Density | 1,044.9 | 485.0 | 93.4 |
| Land Area | 1.6 | 3.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Versailles, IN | Decatur, TN | United States |
| Age 0 to 4 | 6.1% | 7.9% | 5.9% |
| Age 5 to 9 | 4.7% | 6.1% | 6.1% |
| Age 10 to 14 | 5.6% | 4.0% | 6.6% |
| Age 15 to 17 | 3.8% | 4.6% | 3.9% |
| Age 18 to 20 | 5.6% | 4.1% | 4.0% |
| Age 21 to 24 | 7.7% | 7.3% | 5.2% |
| Age 25 to 34 | 10.0% | 10.6% | 13.8% |
| Age 35 to 44 | 11.0% | 14.4% | 12.9% |
| Age 45 to 54 | 13.3% | 10.0% | 12.6% |
| Age 55 to 59 | 4.9% | 6.6% | 6.7% |
| Age 60 to 64 | 10.4% | 3.6% | 6.3% |
| Age 65 to 74 | 12.5% | 10.8% | 9.6% |
| Age 75 to 84 | 3.1% | 8.3% | 4.5% |
| Age 85 and over | 1.4% | 1.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Versailles, IN | Decatur, TN | United States |
| White | 97.7% | 90.4% | 59.4% |
| Black | 0.7% | 3.7% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 1.6% | 4.0% | 3.2% |
| Hispanic | 0.0% | 1.7% | 18.4% |
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| Marriage & Family | | | |
| | Versailles, IN | Decatur, TN | United States |
| Married Population | 44.3% | 47.7% | 49.8% |
| Currently Married | 43.7% | 41.9% | 48.0% |
| Married but Separated | 0.6% | 5.8% | 1.8% |
| Single Population | 55.7% | 52.3% | 50.2% |
| Never Married | 34.9% | 30.6% | 33.8% |
| Divorced | 15.1% | 11.1% | 10.8% |
| Widowed | 5.7% | 10.5% | 5.6% |
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| Household Size | 2.36 | 2.40 | 2.60 |
| Households | 664 | 724 | 124,010,992 |
| Family Households | 389 | 446 | 80,755,759 |
| Married couple, w/children | 31.6% | 29.4% | 30.5% |
| Married couple, no children | 40.6% | 32.3% | 42.9% |
| Non Family Households | 275 | 278 | 43,255,233 |
| Single householder, w/children | 18.5% | 26.0% | 15.8% |
| Single householder, no children | 9.3% | 12.3% | 10.8% |