McLean County's 2026 population is estimated at 173,221, reflecting a 0.33% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). McLean County is the 13th largest county in Illinois. The 2010 population was 169,815 and has grown 2.01% since 2010.
Data after 2023 is projected based on recent change
Overall: 34.3 years
Female: 34.8 years
Male: 33.7 years
There are 135,165 adults, (25,004 of whom are seniors) in McLean County.
Female: 87,701 (51.1%)
Male: 83,855 (48.9%)
The racial composition of McLean County includes 77.98% White, 8.53% Black or African American, 5.25% Asian, and smaller percentages for other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 133,787 | 77.98% |
| Black or African American | 14,627 | 8.53% |
| Two or more races | 9,907 | 5.77% |
| Asian | 9,007 | 5.25% |
| Other race | 3,616 | 2.11% |
| Native American | 541 | 0.32% |
| Native Hawaiian or Pacific Islander | 71 | 0.04% |
McLean County 's average per capita income is $59,024. Household income levels show a median of $79,905. The poverty rate stands at 12.91%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $130,860 | $158,012 |
| Families | $112,292 | $138,877 |
| Households | $79,905 | $105,003 |
| Non Families | $42,308 | $57,936 |
Average Income
Median Household Income
Poverty Rate