| | Centre, AL | Carlyle, IL | United States |
| Population | 3,497 | 3,290 | 329,725,481 |
| Female Population | 59.3% | 50.3% | 50.5% |
| Male Population | 40.7% | 49.7% | 49.5% |
| Median Age | 53.7 | 35.3 | 38.4 |
| space3 | | | |
| Population - 2010 | 3,540 | 3,301 | 309,327,143 |
| Population - 2000 | 3,216 | 3,406 | 285,036,114 |
| Population - 1990 | 2,893 | 3,474 | 251,960,433 |
| Pop. 2000 to Now | 12.4% | -7.6% | 15.6% |
| Pop. 1990 to Now | 25.0% | -9.4% | 30.8% |
| space4 | | | |
| Population Density | 311.0 | 970.8 | 93.4 |
| Land Area | 11.2 | 3.4 | 3,531,905.4 |
| Water Area | 0.1 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Centre, AL | Carlyle, IL | United States |
| Age 0 to 4 | 2.9% | 5.6% | 5.9% |
| Age 5 to 9 | 2.0% | 7.2% | 6.1% |
| Age 10 to 14 | 3.4% | 5.8% | 6.6% |
| Age 15 to 17 | 5.0% | 1.9% | 3.9% |
| Age 18 to 20 | 4.8% | 9.2% | 4.0% |
| Age 21 to 24 | 2.9% | 6.6% | 5.2% |
| Age 25 to 34 | 8.3% | 13.1% | 13.8% |
| Age 35 to 44 | 8.2% | 13.1% | 12.9% |
| Age 45 to 54 | 17.8% | 10.0% | 12.6% |
| Age 55 to 59 | 8.1% | 4.8% | 6.7% |
| Age 60 to 64 | 9.0% | 4.3% | 6.3% |
| Age 65 to 74 | 9.3% | 10.8% | 9.6% |
| Age 75 to 84 | 11.0% | 5.5% | 4.5% |
| Age 85 and over | 7.4% | 2.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Centre, AL | Carlyle, IL | United States |
| White | 84.4% | 89.4% | 59.4% |
| Black | 13.4% | 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 | 1.6% | 6.7% | 3.2% |
| Hispanic | 0.6% | 1.9% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Centre, AL | Carlyle, IL | United States |
| Married Population | 31.1% | 47.0% | 49.8% |
| Currently Married | 30.0% | 46.3% | 48.0% |
| Married but Separated | 1.1% | 0.7% | 1.8% |
| Single Population | 68.9% | 53.0% | 50.2% |
| Never Married | 29.8% | 36.5% | 33.8% |
| Divorced | 26.9% | 13.0% | 10.8% |
| Widowed | 12.2% | 3.5% | 5.6% |
| space5 | | | |
| Household Size | 2.38 | 2.42 | 2.60 |
| Households | 1,359 | 1,278 | 124,010,992 |
| Family Households | 811 | 920 | 80,755,759 |
| Married couple, w/children | 15.2% | 32.0% | 30.5% |
| Married couple, no children | 40.6% | 35.1% | 42.9% |
| Non Family Households | 548 | 358 | 43,255,233 |
| Single householder, w/children | 16.9% | 17.4% | 15.8% |
| Single householder, no children | 27.4% | 15.5% | 10.8% |