Lake County's 2026 population is estimated at 507,683, reflecting a 0.47% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Lake County is the 2nd largest county in Indiana. The 2010 population was 495,972 and has grown 2.36% since 2010.
Data after 2023 is projected based on recent change
Overall: 39.7 years
Female: 40.9 years
Male: 38.4 years
There are 384,539 adults, (89,442 of whom are seniors) in Lake County.
Female: 256,872 (51.3%)
Male: 243,507 (48.7%)
The racial composition of Lake County includes 54.85% White, 23.07% Black or African American, 7.97% other race, and smaller percentages for Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 274,459 | 54.85% |
| Black or African American | 115,462 | 23.07% |
| Two or more races | 59,863 | 11.96% |
| Other race | 39,870 | 7.97% |
| Asian | 8,064 | 1.61% |
| Native American | 2,582 | 0.52% |
| Native Hawaiian or Pacific Islander | 79 | 0.02% |
Lake County 's average per capita income is $50,262. Household income levels show a median of $71,493. The poverty rate stands at 14.29%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $111,770 | $132,241 |
| Families | $88,760 | $109,926 |
| Households | $71,493 | $93,636 |
| Non Families | $41,898 | $58,024 |
Average Income
Median Household Income
Poverty Rate