| | Webster, WI | Washington, IL | United States |
| Population | 628 | 16,008 | 329,725,481 |
| Female Population | 56.1% | 51.6% | 50.5% |
| Male Population | 44.0% | 48.4% | 49.5% |
| Median Age | 45 | 37.4 | 38.4 |
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| Population - 2010 | 644 | 15,277 | 309,327,143 |
| Population - 2000 | 653 | 10,841 | 285,036,114 |
| Population - 1990 | 623 | 10,099 | 251,960,433 |
| Pop. 2000 to Now | -5.1% | 51.2% | 15.6% |
| Pop. 1990 to Now | -0.5% | 62.3% | 30.8% |
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| Population Density | 358.2 | 1,892.4 | 93.4 |
| Land Area | 1.8 | 8.5 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Webster, WI | Washington, IL | United States |
| Age 0 to 4 | 8.8% | 5.9% | 5.9% |
| Age 5 to 9 | 8.1% | 9.6% | 6.1% |
| Age 10 to 14 | 4.1% | 9.3% | 6.6% |
| Age 15 to 17 | 0.6% | 5.5% | 3.9% |
| Age 18 to 20 | 3.0% | 3.3% | 4.0% |
| Age 21 to 24 | 6.5% | 2.1% | 5.2% |
| Age 25 to 34 | 9.6% | 11.7% | 13.8% |
| Age 35 to 44 | 9.2% | 14.7% | 12.9% |
| Age 45 to 54 | 12.4% | 11.3% | 12.6% |
| Age 55 to 59 | 9.4% | 5.1% | 6.7% |
| Age 60 to 64 | 7.6% | 6.0% | 6.3% |
| Age 65 to 74 | 14.3% | 7.9% | 9.6% |
| Age 75 to 84 | 4.6% | 5.1% | 4.5% |
| Age 85 and over | 1.6% | 2.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Webster, WI | Washington, IL | United States |
| White | 92.7% | 94.4% | 59.4% |
| Black | 2.9% | 0.6% | 12.2% |
| Asian | 0.3% | 1.2% | 5.6% |
| Native American | 3.5% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.2% | 0.4% |
| Two or More Races | 0.6% | 1.3% | 3.2% |
| Hispanic | 0.0% | 2.4% | 18.4% |
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| Marriage & Family | | | |
| | Webster, WI | Washington, IL | United States |
| Married Population | 37.1% | 60.2% | 49.8% |
| Currently Married | 31.9% | 59.1% | 48.0% |
| Married but Separated | 5.2% | 1.1% | 1.8% |
| Single Population | 62.9% | 39.8% | 50.2% |
| Never Married | 33.3% | 23.9% | 33.8% |
| Divorced | 23.8% | 7.7% | 10.8% |
| Widowed | 5.8% | 8.2% | 5.6% |
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| Household Size | 2.18 | 2.65 | 2.60 |
| Households | 288 | 6,013 | 124,010,992 |
| Family Households | 140 | 4,178 | 80,755,759 |
| Married couple, w/children | 14.3% | 40.0% | 30.5% |
| Married couple, no children | 40.7% | 42.3% | 42.9% |
| Non Family Households | 148 | 1,835 | 43,255,233 |
| Single householder, w/children | 33.6% | 12.4% | 15.8% |
| Single householder, no children | 11.4% | 5.4% | 10.8% |