| | Delavan, WI | Bolingbrook, IL | United States |
| Population | 8,568 | 73,807 | 329,725,481 |
| Female Population | 50.8% | 51.0% | 50.5% |
| Male Population | 49.2% | 49.0% | 49.5% |
| Median Age | 37.4 | 37.4 | 38.4 |
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| Population - 2010 | 8,433 | 73,472 | 309,327,143 |
| Population - 2000 | 7,956 | 56,321 | 285,036,114 |
| Population - 1990 | 6,073 | 40,843 | 251,960,433 |
| Pop. 2000 to Now | 3.6% | 31.4% | 15.6% |
| Pop. 1990 to Now | 35.7% | 81.2% | 30.8% |
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| Population Density | 1,228.9 | 2,998.6 | 93.4 |
| Land Area | 7.0 | 24.6 | 3,531,905.4 |
| Water Area | 0.5 | 0.2 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Delavan, WI | Bolingbrook, IL | United States |
| Age 0 to 4 | 4.4% | 5.5% | 5.9% |
| Age 5 to 9 | 7.6% | 6.4% | 6.1% |
| Age 10 to 14 | 7.5% | 8.2% | 6.6% |
| Age 15 to 17 | 2.9% | 4.7% | 3.9% |
| Age 18 to 20 | 3.2% | 4.1% | 4.0% |
| Age 21 to 24 | 4.9% | 6.1% | 5.2% |
| Age 25 to 34 | 15.9% | 12.3% | 13.8% |
| Age 35 to 44 | 14.0% | 14.5% | 12.9% |
| Age 45 to 54 | 12.2% | 14.6% | 12.6% |
| Age 55 to 59 | 6.5% | 6.4% | 6.7% |
| Age 60 to 64 | 6.0% | 5.8% | 6.3% |
| Age 65 to 74 | 9.5% | 7.8% | 9.6% |
| Age 75 to 84 | 3.3% | 2.6% | 4.5% |
| Age 85 and over | 2.0% | 1.0% | 1.9% |
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| Race | | | |
| | Delavan, WI | Bolingbrook, IL | United States |
| White | 73.0% | 39.5% | 59.4% |
| Black | 1.0% | 18.3% | 12.2% |
| Asian | 1.3% | 13.0% | 5.6% |
| Native American | 0.1% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.7% | 0.3% | 0.4% |
| Two or More Races | 0.5% | 2.9% | 3.2% |
| Hispanic | 23.4% | 25.9% | 18.4% |
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| Marriage & Family | | | |
| | Delavan, WI | Bolingbrook, IL | United States |
| Married Population | 44.1% | 54.5% | 49.8% |
| Currently Married | 43.8% | 53.2% | 48.0% |
| Married but Separated | 0.4% | 1.3% | 1.8% |
| Single Population | 55.9% | 45.5% | 50.2% |
| Never Married | 39.3% | 34.6% | 33.8% |
| Divorced | 11.2% | 7.0% | 10.8% |
| Widowed | 5.4% | 3.9% | 5.6% |
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| Household Size | 2.45 | 3.12 | 2.60 |
| Households | 3,468 | 23,520 | 124,010,992 |
| Family Households | 2,282 | 18,564 | 80,755,759 |
| Married couple, w/children | 22.3% | 34.8% | 30.5% |
| Married couple, no children | 41.8% | 40.9% | 42.9% |
| Non Family Households | 1,186 | 4,956 | 43,255,233 |
| Single householder, w/children | 22.3% | 15.1% | 15.8% |
| Single householder, no children | 13.5% | 9.3% | 10.8% |