Union County's estimated 2026 population is 16,926 with a growth rate of 0.12% in the past year according to the most recent United States census data. Union County is the 60th largest county in Illinois. The 2010 population was 17,729 and has seen a growth of -4.53% since that time.
Data after 2023 is projected based on recent change
The racial composition of Union County includes 90.53% White, and smaller percentages for Black or African American, Asian, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (90.53%)
Two or more races (7.58%)
Black or African American (0.8%)
Asian (0.44%)
Other race (0.37%)
Native American (0.16%)
Native Hawaiian or Pacific Islander (0.13%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 15,364 | 90.53% |
| Two or more races | 1,286 | 7.58% |
| Black or African American | 135 | 0.8% |
| Asian | 75 | 0.44% |
| Other race | 63 | 0.37% |
| Native American | 27 | 0.16% |
| Native Hawaiian or Pacific Islander | 22 | 0.13% |
Married
Widowed
Divorced
Separated
Never Married
Union County's average per capita income is $45,821. Household income levels show a median of $56,420. The poverty rate stands at 19.35%.
Name | Median | Mean |
|---|---|---|
| Married Families | $89,507 | - |
| Families | $83,539 | $93,346 |
| Households | $56,420 | $75,913 |
| Non Families | $30,170 | $44,007 |
Average Income
Median Household Income
Poverty Rate
