| | Leesburg, IN | Winnetka, IL | United States |
| Population | 757 | 12,658 | 329,725,481 |
| Female Population | 43.3% | 49.9% | 50.5% |
| Male Population | 56.7% | 50.2% | 49.5% |
| Median Age | 30.9 | 42.6 | 38.4 |
| space3 | | | |
| Population - 2010 | 552 | 12,212 | 309,327,143 |
| Population - 2000 | 625 | 12,419 | 285,036,114 |
| Population - 1990 | 584 | 12,174 | 251,960,433 |
| Pop. 2000 to Now | -12.6% | -1.8% | 15.6% |
| Pop. 1990 to Now | -6.5% | 0.2% | 30.8% |
| space4 | | | |
| Population Density | 2,911.5 | 3,324.9 | 93.4 |
| Land Area | 0.3 | 3.8 | 3,531,905.4 |
| Water Area | 0.0 | 0.1 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Leesburg, IN | Winnetka, IL | United States |
| Age 0 to 4 | 13.3% | 8.7% | 5.9% |
| Age 5 to 9 | 9.1% | 9.5% | 6.1% |
| Age 10 to 14 | 9.8% | 8.2% | 6.6% |
| Age 15 to 17 | 2.0% | 5.7% | 3.9% |
| Age 18 to 20 | 1.1% | 2.0% | 4.0% |
| Age 21 to 24 | 4.8% | 2.3% | 5.2% |
| Age 25 to 34 | 19.6% | 5.1% | 13.8% |
| Age 35 to 44 | 13.3% | 10.9% | 12.9% |
| Age 45 to 54 | 9.9% | 17.3% | 12.6% |
| Age 55 to 59 | 7.1% | 6.7% | 6.7% |
| Age 60 to 64 | 2.6% | 6.7% | 6.3% |
| Age 65 to 74 | 4.4% | 11.4% | 9.6% |
| Age 75 to 84 | 2.4% | 4.2% | 4.5% |
| Age 85 and over | 0.7% | 1.3% | 1.9% |
| space1 | | | |
| Race | | | |
| | Leesburg, IN | Winnetka, IL | United States |
| White | 86.5% | 91.0% | 59.4% |
| Black | 0.0% | 0.0% | 12.2% |
| Asian | 2.5% | 2.6% | 5.6% |
| Native American | 0.0% | 0.0% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.1% | 0.2% |
| Other | 0.0% | 1.2% | 0.4% |
| Two or More Races | 0.8% | 3.8% | 3.2% |
| Hispanic | 10.2% | 1.3% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Leesburg, IN | Winnetka, IL | United States |
| Married Population | 61.2% | 74.0% | 49.8% |
| Currently Married | 61.2% | 73.7% | 48.0% |
| Married but Separated | 0.0% | 0.3% | 1.8% |
| Single Population | 38.8% | 26.0% | 50.2% |
| Never Married | 24.2% | 18.5% | 33.8% |
| Divorced | 9.4% | 5.1% | 10.8% |
| Widowed | 5.3% | 2.4% | 5.6% |
| space5 | | | |
| Household Size | 3.28 | 2.91 | 2.60 |
| Households | 231 | 4,353 | 124,010,992 |
| Family Households | 180 | 3,541 | 80,755,759 |
| Married couple, w/children | 51.1% | 48.7% | 30.5% |
| Married couple, no children | 30.0% | 46.6% | 42.9% |
| Non Family Households | 51 | 812 | 43,255,233 |
| Single householder, w/children | 16.1% | 2.6% | 15.8% |
| Single householder, no children | 2.8% | 2.1% | 10.8% |