| | Cassville, WI | Oak Lawn, IL | United States |
| Population | 705 | 58,032 | 329,725,481 |
| Female Population | 55.5% | 50.9% | 50.5% |
| Male Population | 44.5% | 49.1% | 49.5% |
| Median Age | 54 | 41.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 923 | 56,732 | 309,327,143 |
| Population - 2000 | 1,085 | 55,245 | 285,036,114 |
| Population - 1990 | 1,144 | 56,182 | 251,960,433 |
| Pop. 2000 to Now | -19.2% | -1.6% | 15.6% |
| Pop. 1990 to Now | -23.3% | -3.2% | 30.8% |
| space4 | | | |
| Population Density | 682.5 | 6,770.7 | 93.4 |
| Land Area | 1.0 | 8.6 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Cassville, WI | Oak Lawn, IL | United States |
| Age 0 to 4 | 5.4% | 6.4% | 5.9% |
| Age 5 to 9 | 2.6% | 6.0% | 6.1% |
| Age 10 to 14 | 2.4% | 6.3% | 6.6% |
| Age 15 to 17 | 4.8% | 3.3% | 3.9% |
| Age 18 to 20 | 5.7% | 3.0% | 4.0% |
| Age 21 to 24 | 3.3% | 4.0% | 5.2% |
| Age 25 to 34 | 5.4% | 12.5% | 13.8% |
| Age 35 to 44 | 9.2% | 12.4% | 12.9% |
| Age 45 to 54 | 12.9% | 12.9% | 12.6% |
| Age 55 to 59 | 8.2% | 7.1% | 6.7% |
| Age 60 to 64 | 5.4% | 7.9% | 6.3% |
| Age 65 to 74 | 22.4% | 11.2% | 9.6% |
| Age 75 to 84 | 9.2% | 5.1% | 4.5% |
| Age 85 and over | 3.1% | 2.0% | 1.9% |
| space1 | | | |
| Race | | | |
| | Cassville, WI | Oak Lawn, IL | United States |
| White | 99.3% | 65.2% | 59.4% |
| Black | 0.0% | 7.4% | 12.2% |
| Asian | 0.0% | 3.0% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.4% | 0.5% | 0.4% |
| Two or More Races | 0.0% | 2.0% | 3.2% |
| Hispanic | 0.3% | 21.8% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Cassville, WI | Oak Lawn, IL | United States |
| Married Population | 53.6% | 51.0% | 49.8% |
| Currently Married | 53.6% | 49.9% | 48.0% |
| Married but Separated | 0.0% | 1.1% | 1.8% |
| Single Population | 46.4% | 49.0% | 50.2% |
| Never Married | 25.9% | 32.1% | 33.8% |
| Divorced | 9.0% | 8.9% | 10.8% |
| Widowed | 11.4% | 8.0% | 5.6% |
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| Household Size | 2.23 | 2.61 | 2.60 |
| Households | 316 | 22,064 | 124,010,992 |
| Family Households | 199 | 14,296 | 80,755,759 |
| Married couple, w/children | 18.1% | 33.1% | 30.5% |
| Married couple, no children | 54.8% | 42.7% | 42.9% |
| Non Family Households | 117 | 7,768 | 43,255,233 |
| Single householder, w/children | 12.6% | 10.5% | 15.8% |
| Single householder, no children | 14.6% | 13.7% | 10.8% |