| | Williamsburg, IA | Covington, IN | United States |
| Population | 3,322 | 2,799 | 329,725,481 |
| Female Population | 50.3% | 47.9% | 50.5% |
| Male Population | 49.7% | 52.1% | 49.5% |
| Median Age | 38.2 | 45.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,065 | 2,671 | 309,327,143 |
| Population - 2000 | 2,622 | 2,565 | 285,036,114 |
| Population - 1990 | 2,174 | 2,747 | 251,960,433 |
| Pop. 2000 to Now | 21.2% | -1.0% | 15.6% |
| Pop. 1990 to Now | 46.2% | -7.5% | 30.8% |
| space4 | | | |
| Population Density | 983.1 | 2,380.1 | 93.4 |
| Land Area | 3.4 | 1.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Williamsburg, IA | Covington, IN | United States |
| Age 0 to 4 | 4.6% | 5.4% | 5.9% |
| Age 5 to 9 | 7.0% | 4.0% | 6.1% |
| Age 10 to 14 | 7.7% | 7.5% | 6.6% |
| Age 15 to 17 | 2.5% | 3.7% | 3.9% |
| Age 18 to 20 | 3.2% | 3.9% | 4.0% |
| Age 21 to 24 | 8.7% | 4.0% | 5.2% |
| Age 25 to 34 | 14.4% | 10.6% | 13.8% |
| Age 35 to 44 | 12.2% | 10.6% | 12.9% |
| Age 45 to 54 | 15.4% | 15.9% | 12.6% |
| Age 55 to 59 | 4.0% | 5.4% | 6.7% |
| Age 60 to 64 | 6.8% | 6.0% | 6.3% |
| Age 65 to 74 | 4.7% | 11.0% | 9.6% |
| Age 75 to 84 | 5.2% | 8.7% | 4.5% |
| Age 85 and over | 3.6% | 3.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Williamsburg, IA | Covington, IN | United States |
| White | 93.6% | 91.7% | 59.4% |
| Black | 0.0% | 1.4% | 12.2% |
| Asian | 0.2% | 1.9% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.4% | 0.4% |
| Two or More Races | 1.4% | 0.6% | 3.2% |
| Hispanic | 4.8% | 4.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Williamsburg, IA | Covington, IN | United States |
| Married Population | 46.0% | 52.1% | 49.8% |
| Currently Married | 46.0% | 50.9% | 48.0% |
| Married but Separated | 0.0% | 1.2% | 1.8% |
| Single Population | 54.0% | 47.9% | 50.2% |
| Never Married | 40.5% | 22.2% | 33.8% |
| Divorced | 5.9% | 17.0% | 10.8% |
| Widowed | 7.6% | 8.7% | 5.6% |
| space5 | | | |
| Household Size | 2.21 | 2.17 | 2.60 |
| Households | 1,480 | 1,257 | 124,010,992 |
| Family Households | 845 | 727 | 80,755,759 |
| Married couple, w/children | 27.5% | 25.7% | 30.5% |
| Married couple, no children | 47.5% | 50.2% | 42.9% |
| Non Family Households | 635 | 530 | 43,255,233 |
| Single householder, w/children | 13.8% | 17.9% | 15.8% |
| Single householder, no children | 11.2% | 6.2% | 10.8% |