Lake County's 2026 population is estimated at 727,398, reflecting a 0.61% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Lake County is the 3rd largest county in Illinois. The 2010 population was 704,179 and has grown 3.3% since 2010.
Data after 2023 is projected based on recent change
Overall: 39.1 years
Female: 40.3 years
Male: 37.9 years
There are 547,917 adults, (112,792 of whom are seniors) in Lake County.
Female: 354,995 (49.7%)
Male: 359,228 (50.3%)
The racial composition of Lake County includes 61.23% White, 9.08% other race, 8.7% Asian, 6.67% Black or African American, and smaller percentages for Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 437,310 | 61.23% |
| Two or more races | 94,994 | 13.3% |
| Other race | 64,867 | 9.08% |
| Asian | 62,162 | 8.7% |
| Black or African American | 47,642 | 6.67% |
| Native American | 6,816 | 0.95% |
| Native Hawaiian or Pacific Islander | 432 | 0.06% |
Lake County 's average per capita income is $64,173. Household income levels show a median of $110,416. The poverty rate stands at 8.34%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $156,173 | $207,028 |
| Families | $135,361 | $182,727 |
| Households | $110,416 | $155,726 |
| Non Families | $57,372 | $82,041 |
Average Income
Median Household Income
Poverty Rate
