McDonough County's estimated 2026 population is 26,082 with a growth rate of -1.1% in the past year according to the most recent United States census data. McDonough County is the 51st largest county in Illinois. The 2010 population was 32,631 and has seen a growth of -20.07% since that time.
Data after 2023 is projected based on recent change
The racial composition of McDonough County includes 87.12% White, 5.82% Black or African American, and smaller percentages for Asian, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (87.12%)
Black or African American (5.82%)
Two or more races (3.86%)
Asian (1.98%)
Other race (1.17%)
Native American (0.03%)
Native Hawaiian or Pacific Islander (0.03%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 23,610 | 87.12% |
| Black or African American | 1,578 | 5.82% |
| Two or more races | 1,046 | 3.86% |
| Asian | 536 | 1.98% |
| Other race | 316 | 1.17% |
| Native American | 9 | 0.03% |
| Native Hawaiian or Pacific Islander | 7 | 0.03% |
Married
Widowed
Divorced
Separated
Never Married
McDonough County's average per capita income is $41,665. Household income levels show a median of $50,434. The poverty rate stands at 19.91%.
Name | Median | Mean |
|---|---|---|
| Married Families | $91,701 | - |
| Families | $74,951 | $95,646 |
| Households | $50,434 | $69,045 |
| Non Families | $30,349 | $41,425 |
Average Income
Median Household Income
Poverty Rate
