| | Crestwood, IL | Middle Valley, TN | United States |
| Population | 10,908 | 11,569 | 329,725,481 |
| Female Population | 52.4% | 47.5% | 50.5% |
| Male Population | 47.6% | 52.6% | 49.5% |
| Median Age | 47.5 | 38.8 | 38.4 |
| space3 | | | |
| Population - 2010 | 10,966 | 12,853 | 309,327,143 |
| Population - 2000 | 11,251 | 11,854 | 285,036,114 |
| Population - 1990 | 10,823 | 12,255 | 251,960,433 |
| Pop. 2000 to Now | -5.8% | 8.5% | 15.6% |
| Pop. 1990 to Now | -2.0% | 5.0% | 30.8% |
| space4 | | | |
| Population Density | 3,578.7 | 1,185.0 | 93.4 |
| Land Area | 3.0 | 9.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Crestwood, IL | Middle Valley, TN | United States |
| Age 0 to 4 | 5.0% | 5.3% | 5.9% |
| Age 5 to 9 | 6.1% | 7.6% | 6.1% |
| Age 10 to 14 | 3.6% | 6.2% | 6.6% |
| Age 15 to 17 | 1.6% | 4.1% | 3.9% |
| Age 18 to 20 | 2.2% | 1.8% | 4.0% |
| Age 21 to 24 | 4.0% | 5.1% | 5.2% |
| Age 25 to 34 | 15.7% | 14.6% | 13.8% |
| Age 35 to 44 | 9.3% | 13.4% | 12.9% |
| Age 45 to 54 | 11.0% | 13.8% | 12.6% |
| Age 55 to 59 | 7.6% | 5.6% | 6.7% |
| Age 60 to 64 | 8.7% | 5.1% | 6.3% |
| Age 65 to 74 | 14.0% | 10.0% | 9.6% |
| Age 75 to 84 | 7.1% | 5.1% | 4.5% |
| Age 85 and over | 4.1% | 2.1% | 1.9% |
| space1 | | | |
| Race | | | |
| | Crestwood, IL | Middle Valley, TN | United States |
| White | 74.4% | 81.4% | 59.4% |
| Black | 8.4% | 6.7% | 12.2% |
| Asian | 3.0% | 3.1% | 5.6% |
| Native American | 0.0% | 0.1% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.1% | 0.4% |
| Two or More Races | 1.5% | 2.1% | 3.2% |
| Hispanic | 12.7% | 6.6% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Crestwood, IL | Middle Valley, TN | United States |
| Married Population | 40.1% | 58.2% | 49.8% |
| Currently Married | 38.6% | 57.2% | 48.0% |
| Married but Separated | 1.5% | 1.0% | 1.8% |
| Single Population | 59.9% | 41.8% | 50.2% |
| Never Married | 35.3% | 24.8% | 33.8% |
| Divorced | 13.9% | 12.2% | 10.8% |
| Widowed | 10.7% | 4.8% | 5.6% |
| space5 | | | |
| Household Size | 2.18 | 2.78 | 2.60 |
| Households | 4,693 | 4,163 | 124,010,992 |
| Family Households | 2,261 | 3,275 | 80,755,759 |
| Married couple, w/children | 23.0% | 29.2% | 30.5% |
| Married couple, no children | 44.6% | 49.4% | 42.9% |
| Non Family Households | 2,432 | 888 | 43,255,233 |
| Single householder, w/children | 16.7% | 11.4% | 15.8% |
| Single householder, no children | 15.7% | 10.0% | 10.8% |