Clinton County's estimated 2026 population is 37,489 with a growth rate of 0.54% in the past year according to the most recent United States census data. Clinton County is the 35th largest county in Illinois. The 2010 population was 37,833 and has seen a growth of -0.91% since that time.
Data after 2023 is projected based on recent change
The racial composition of Clinton County includes 91.36% White, 3.15% Black or African American, and smaller percentages for other race, Asian, Native American and multiracial populations.
White (91.36%)
Two or more races (3.76%)
Black or African American (3.15%)
Other race (1.06%)
Asian (0.56%)
Native American (0.11%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 33,710 | 91.36% |
| Two or more races | 1,387 | 3.76% |
| Black or African American | 1,164 | 3.15% |
| Other race | 390 | 1.06% |
| Asian | 206 | 0.56% |
| Native American | 42 | 0.11% |
Married
Widowed
Divorced
Separated
Never Married
Clinton County's average per capita income is $53,501. Household income levels show a median of $82,314. The poverty rate stands at 7.5%.
Name | Median | Mean |
|---|---|---|
| Married Families | $110,213 | - |
| Families | $102,033 | $122,720 |
| Households | $82,314 | $104,928 |
| Non Families | $43,833 | $66,178 |
Average Income
Median Household Income
Poverty Rate
