| | Earlville, IL | Capron, IL | United States |
| Population | 1,932 | 1,557 | 329,725,481 |
| Female Population | 46.0% | 45.7% | 50.5% |
| Male Population | 54.0% | 54.3% | 49.5% |
| Median Age | 36.5 | 29.9 | 38.4 |
| space3 | | | |
| Population - 2010 | 1,701 | 1,374 | 309,327,143 |
| Population - 2000 | 1,778 | 961 | 285,036,114 |
| Population - 1990 | 1,435 | 682 | 251,960,433 |
| Pop. 2000 to Now | -11.7% | 39.8% | 15.6% |
| Pop. 1990 to Now | 9.4% | 96.9% | 30.8% |
| space4 | | | |
| Population Density | 1,608.7 | 2,009.0 | 93.4 |
| Land Area | 1.2 | 0.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.0 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Earlville, IL | Capron, IL | United States |
| Age 0 to 4 | 4.7% | 7.0% | 5.9% |
| Age 5 to 9 | 7.9% | 6.0% | 6.1% |
| Age 10 to 14 | 3.6% | 10.0% | 6.6% |
| Age 15 to 17 | 4.5% | 5.0% | 3.9% |
| Age 18 to 20 | 3.5% | 2.9% | 4.0% |
| Age 21 to 24 | 9.4% | 8.7% | 5.2% |
| Age 25 to 34 | 14.6% | 16.2% | 13.8% |
| Age 35 to 44 | 9.0% | 13.0% | 12.9% |
| Age 45 to 54 | 11.9% | 12.1% | 12.6% |
| Age 55 to 59 | 5.3% | 8.2% | 6.7% |
| Age 60 to 64 | 8.8% | 3.8% | 6.3% |
| Age 65 to 74 | 11.8% | 4.5% | 9.6% |
| Age 75 to 84 | 3.6% | 1.9% | 4.5% |
| Age 85 and over | 1.5% | 0.6% | 1.9% |
| space1 | | | |
| Race | | | |
| | Earlville, IL | Capron, IL | United States |
| White | 85.2% | 54.3% | 59.4% |
| Black | 0.3% | 0.2% | 12.2% |
| Asian | 0.3% | 0.0% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.0% | 0.4% |
| Two or More Races | 4.1% | 1.5% | 3.2% |
| Hispanic | 10.1% | 44.0% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Earlville, IL | Capron, IL | United States |
| Married Population | 51.3% | 40.3% | 49.8% |
| Currently Married | 49.2% | 37.9% | 48.0% |
| Married but Separated | 2.1% | 2.4% | 1.8% |
| Single Population | 48.7% | 59.7% | 50.2% |
| Never Married | 32.3% | 44.5% | 33.8% |
| Divorced | 11.4% | 11.3% | 10.8% |
| Widowed | 5.1% | 3.9% | 5.6% |
| space5 | | | |
| Household Size | 2.34 | 3.44 | 2.60 |
| Households | 827 | 453 | 124,010,992 |
| Family Households | 482 | 326 | 80,755,759 |
| Married couple, w/children | 27.6% | 29.8% | 30.5% |
| Married couple, no children | 53.3% | 29.4% | 42.9% |
| Non Family Households | 345 | 127 | 43,255,233 |
| Single householder, w/children | 13.5% | 27.9% | 15.8% |
| Single householder, no children | 5.6% | 12.9% | 10.8% |