| | Superior, WI | Chester, CA | United States |
| Population | 26,601 | 2,242 | 329,725,481 |
| Female Population | 51.6% | 51.0% | 50.5% |
| Male Population | 48.4% | 49.0% | 49.5% |
| Median Age | 38.1 | 58 | 38.4 |
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| Population - 2010 | 27,192 | 1,841 | 309,327,143 |
| Population - 2000 | 27,368 | 2,316 | 285,036,114 |
| Population - 1990 | 27,134 | 2,082 | 251,960,433 |
| Pop. 2000 to Now | -4.2% | 1.0% | 15.6% |
| Pop. 1990 to Now | -3.4% | 12.4% | 30.8% |
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| Population Density | 725.8 | 307.6 | 93.4 |
| Land Area | 36.6 | 7.3 | 3,531,905.4 |
| Water Area | 8.7 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Superior, WI | Chester, CA | United States |
| Age 0 to 4 | 4.9% | 2.7% | 5.9% |
| Age 5 to 9 | 4.9% | 4.0% | 6.1% |
| Age 10 to 14 | 6.8% | 3.5% | 6.6% |
| Age 15 to 17 | 3.6% | 1.2% | 3.9% |
| Age 18 to 20 | 4.6% | 2.1% | 4.0% |
| Age 21 to 24 | 6.1% | 1.5% | 5.2% |
| Age 25 to 34 | 14.3% | 10.0% | 13.8% |
| Age 35 to 44 | 14.2% | 10.9% | 12.9% |
| Age 45 to 54 | 12.5% | 11.8% | 12.6% |
| Age 55 to 59 | 5.5% | 4.6% | 6.7% |
| Age 60 to 64 | 6.6% | 11.2% | 6.3% |
| Age 65 to 74 | 8.9% | 25.2% | 9.6% |
| Age 75 to 84 | 4.9% | 8.3% | 4.5% |
| Age 85 and over | 2.1% | 3.1% | 1.9% |
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| Race | | | |
| | Superior, WI | Chester, CA | United States |
| White | 88.8% | 83.3% | 59.4% |
| Black | 1.9% | 0.0% | 12.2% |
| Asian | 2.0% | 0.0% | 5.6% |
| Native American | 1.2% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.2% | 0.0% | 0.4% |
| Two or More Races | 3.8% | 1.7% | 3.2% |
| Hispanic | 2.2% | 15.0% | 18.4% |
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| Marriage & Family | | | |
| | Superior, WI | Chester, CA | United States |
| Married Population | 40.7% | 60.6% | 49.8% |
| Currently Married | 38.9% | 60.0% | 48.0% |
| Married but Separated | 1.8% | 0.6% | 1.8% |
| Single Population | 59.3% | 39.4% | 50.2% |
| Never Married | 34.9% | 18.9% | 33.8% |
| Divorced | 16.7% | 15.7% | 10.8% |
| Widowed | 7.8% | 4.8% | 5.6% |
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| Household Size | 2.21 | 2.22 | 2.60 |
| Households | 11,614 | 996 | 124,010,992 |
| Family Households | 6,190 | 655 | 80,755,759 |
| Married couple, w/children | 27.7% | 15.6% | 30.5% |
| Married couple, no children | 39.2% | 63.2% | 42.9% |
| Non Family Households | 5,424 | 341 | 43,255,233 |
| Single householder, w/children | 22.5% | 9.0% | 15.8% |
| Single householder, no children | 10.6% | 12.2% | 10.8% |