| | Mitchell, IL | Glen Carbon, IL | United States |
| Population | 1,129 | 13,532 | 329,725,481 |
| Female Population | 50.6% | 50.0% | 50.5% |
| Male Population | 49.4% | 50.0% | 49.5% |
| Median Age | 39.8 | 40.5 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,103 | 12,947 | 309,327,143 |
| Population - 2000 | 1,208 | 10,425 | 285,036,114 |
| Population - 1990 | 1,080 | 7,731 | 251,960,433 |
| Pop. 2000 to Now | 5.4% | 23.6% | 15.6% |
| Pop. 1990 to Now | 17.9% | 66.7% | 30.8% |
| space4 | | | |
| Population Density | 2,019.7 | 1,325.0 | 93.4 |
| Land Area | 0.6 | 10.2 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
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| Est. Total Population By Age | | | |
| | Mitchell, IL | Glen Carbon, IL | United States |
| Age 0 to 4 | 6.1% | 6.5% | 5.9% |
| Age 5 to 9 | 5.0% | 6.7% | 6.1% |
| Age 10 to 14 | 4.0% | 8.3% | 6.6% |
| Age 15 to 17 | 2.8% | 3.6% | 3.9% |
| Age 18 to 20 | 2.8% | 2.2% | 4.0% |
| Age 21 to 24 | 3.3% | 4.8% | 5.2% |
| Age 25 to 34 | 16.0% | 11.2% | 13.8% |
| Age 35 to 44 | 13.7% | 13.6% | 12.9% |
| Age 45 to 54 | 17.1% | 12.8% | 12.6% |
| Age 55 to 59 | 9.5% | 4.2% | 6.7% |
| Age 60 to 64 | 11.0% | 6.8% | 6.3% |
| Age 65 to 74 | 5.8% | 10.1% | 9.6% |
| Age 75 to 84 | 2.9% | 5.3% | 4.5% |
| Age 85 and over | 0.0% | 3.8% | 1.9% |
| space1 | | | |
| Race | | | |
| | Mitchell, IL | Glen Carbon, IL | United States |
| White | 90.6% | 86.7% | 59.4% |
| Black | 0.7% | 4.3% | 12.2% |
| Asian | 0.0% | 1.6% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.4% | 0.0% | 0.4% |
| Two or More Races | 2.9% | 3.8% | 3.2% |
| Hispanic | 5.4% | 3.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Mitchell, IL | Glen Carbon, IL | United States |
| Married Population | 56.3% | 53.7% | 49.8% |
| Currently Married | 52.5% | 52.4% | 48.0% |
| Married but Separated | 3.9% | 1.3% | 1.8% |
| Single Population | 43.7% | 46.3% | 50.2% |
| Never Married | 22.2% | 24.6% | 33.8% |
| Divorced | 16.4% | 13.2% | 10.8% |
| Widowed | 5.1% | 8.5% | 5.6% |
| space5 | | | |
| Household Size | 2.26 | 2.42 | 2.60 |
| Households | 499 | 5,539 | 124,010,992 |
| Family Households | 324 | 3,816 | 80,755,759 |
| Married couple, w/children | 22.8% | 34.0% | 30.5% |
| Married couple, no children | 50.3% | 38.5% | 42.9% |
| Non Family Households | 175 | 1,723 | 43,255,233 |
| Single householder, w/children | 23.5% | 17.5% | 15.8% |
| Single householder, no children | 3.4% | 10.0% | 10.8% |