| | Keyesport, IL | Carlyle, IL | United States |
| Population | 582 | 3,290 | 329,725,481 |
| Female Population | 55.2% | 50.3% | 50.5% |
| Male Population | 44.9% | 49.7% | 49.5% |
| Median Age | 43.9 | 35.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 423 | 3,301 | 309,327,143 |
| Population - 2000 | 481 | 3,406 | 285,036,114 |
| Population - 1990 | 440 | 3,474 | 251,960,433 |
| Pop. 2000 to Now | -17.3% | -7.6% | 15.6% |
| Pop. 1990 to Now | -9.6% | -9.4% | 30.8% |
| space4 | | | |
| Population Density | 808.3 | 970.8 | 93.4 |
| Land Area | 0.7 | 3.4 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Keyesport, IL | Carlyle, IL | United States |
| Age 0 to 4 | 6.5% | 5.6% | 5.9% |
| Age 5 to 9 | 3.6% | 7.2% | 6.1% |
| Age 10 to 14 | 5.5% | 5.8% | 6.6% |
| Age 15 to 17 | 10.0% | 1.9% | 3.9% |
| Age 18 to 20 | 2.7% | 9.2% | 4.0% |
| Age 21 to 24 | 3.4% | 6.6% | 5.2% |
| Age 25 to 34 | 7.9% | 13.1% | 13.8% |
| Age 35 to 44 | 12.5% | 13.1% | 12.9% |
| Age 45 to 54 | 18.6% | 10.0% | 12.6% |
| Age 55 to 59 | 7.4% | 4.8% | 6.7% |
| Age 60 to 64 | 5.7% | 4.3% | 6.3% |
| Age 65 to 74 | 10.8% | 10.8% | 9.6% |
| Age 75 to 84 | 3.4% | 5.5% | 4.5% |
| Age 85 and over | 1.9% | 2.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Keyesport, IL | Carlyle, IL | United States |
| White | 99.3% | 89.4% | 59.4% |
| Black | 0.0% | 1.8% | 12.2% |
| Asian | 0.0% | 0.0% | 5.6% |
| Native American | 0.0% | 0.2% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 0.7% | 6.7% | 3.2% |
| Hispanic | 0.0% | 1.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Keyesport, IL | Carlyle, IL | United States |
| Married Population | 29.3% | 47.0% | 49.8% |
| Currently Married | 29.3% | 46.3% | 48.0% |
| Married but Separated | 0.0% | 0.7% | 1.8% |
| Single Population | 70.7% | 53.0% | 50.2% |
| Never Married | 37.1% | 36.5% | 33.8% |
| Divorced | 24.2% | 13.0% | 10.8% |
| Widowed | 9.4% | 3.5% | 5.6% |
| space5 | | | |
| Household Size | 2.80 | 2.42 | 2.60 |
| Households | 208 | 1,278 | 124,010,992 |
| Family Households | 151 | 920 | 80,755,759 |
| Married couple, w/children | 23.8% | 32.0% | 30.5% |
| Married couple, no children | 24.5% | 35.1% | 42.9% |
| Non Family Households | 57 | 358 | 43,255,233 |
| Single householder, w/children | 33.8% | 17.4% | 15.8% |
| Single householder, no children | 17.9% | 15.5% | 10.8% |