| | Palos Heights, IL | Waukegan, IL | United States |
| Population | 12,116 | 89,751 | 329,725,481 |
| Female Population | 50.4% | 49.4% | 50.5% |
| Male Population | 49.6% | 50.7% | 49.5% |
| Median Age | 51.3 | 34.2 | 38.4 |
| space3 | | | |
| Population - 2010 | 12,520 | 89,172 | 309,327,143 |
| Population - 2000 | 11,260 | 87,901 | 285,036,114 |
| Population - 1990 | 11,478 | 69,392 | 251,960,433 |
| Pop. 2000 to Now | 9.9% | -2.8% | 15.6% |
| Pop. 1990 to Now | 7.8% | 23.2% | 30.8% |
| space4 | | | |
| Population Density | 3,208.7 | 3,700.2 | 93.4 |
| Land Area | 3.8 | 24.3 | 3,531,905.4 |
| Water Area | 0.1 | 0.2 | 264,836.8 |
| space | | | |
| Est. Total Population By Age | | | |
| | Palos Heights, IL | Waukegan, IL | United States |
| Age 0 to 4 | 4.5% | 6.5% | 5.9% |
| Age 5 to 9 | 4.0% | 6.7% | 6.1% |
| Age 10 to 14 | 6.2% | 7.5% | 6.6% |
| Age 15 to 17 | 3.4% | 5.0% | 3.9% |
| Age 18 to 20 | 4.0% | 4.8% | 4.0% |
| Age 21 to 24 | 3.2% | 6.5% | 5.2% |
| Age 25 to 34 | 10.7% | 14.0% | 13.8% |
| Age 35 to 44 | 9.1% | 14.7% | 12.9% |
| Age 45 to 54 | 8.6% | 12.7% | 12.6% |
| Age 55 to 59 | 8.5% | 6.2% | 6.7% |
| Age 60 to 64 | 7.9% | 4.8% | 6.3% |
| Age 65 to 74 | 16.7% | 6.9% | 9.6% |
| Age 75 to 84 | 8.8% | 2.8% | 4.5% |
| Age 85 and over | 4.6% | 0.9% | 1.9% |
| space1 | | | |
| Race | | | |
| | Palos Heights, IL | Waukegan, IL | United States |
| White | 87.0% | 18.6% | 59.4% |
| Black | 2.4% | 18.4% | 12.2% |
| Asian | 1.3% | 6.4% | 5.6% |
| Native American | 0.3% | 0.3% | 0.6% |
| Hawaiian, Pacific Islander | 0.0% | 0.0% | 0.2% |
| Other | 0.0% | 0.9% | 0.4% |
| Two or More Races | 0.8% | 2.0% | 3.2% |
| Hispanic | 8.2% | 53.4% | 18.4% |
| space2 | | | |
| Marriage & Family | | | |
| | Palos Heights, IL | Waukegan, IL | United States |
| Married Population | 57.0% | 44.2% | 49.8% |
| Currently Married | 56.8% | 42.4% | 48.0% |
| Married but Separated | 0.2% | 1.7% | 1.8% |
| Single Population | 43.0% | 55.8% | 50.2% |
| Never Married | 27.2% | 41.6% | 33.8% |
| Divorced | 7.6% | 10.2% | 10.8% |
| Widowed | 8.2% | 4.1% | 5.6% |
| space5 | | | |
| Household Size | 2.56 | 2.88 | 2.60 |
| Households | 4,467 | 30,399 | 124,010,992 |
| Family Households | 3,275 | 20,695 | 80,755,759 |
| Married couple, w/children | 24.7% | 30.8% | 30.5% |
| Married couple, no children | 59.3% | 32.3% | 42.9% |
| Non Family Households | 1,192 | 9,704 | 43,255,233 |
| Single householder, w/children | 4.6% | 23.4% | 15.8% |
| Single householder, no children | 11.5% | 13.6% | 10.8% |