St. Clair County, Illinois Race & Ethnicity Demographics (2024)
Racial distribution and diversity statistics for St. Clair County, Illinois
St. Clair County, Illinois Diversity Indicators (2024)
Total Population
253,694
Diversity Score
56.8
Diversity Tier
Moderate
Largest Group
White (Non-Hispanic)
59.1%%
St. Clair County, Illinois Racial & Ethnic Breakdown
St. Clair County, Illinois Historical Diversity Trend (2010–2024)
Since 2010, the diversity index of St. Clair County, Illinois has increased significantly.
St. Clair County, Illinois Population by Race & Ethnicity
| Race / Ethnicity | Population | Percentage |
|---|---|---|
| White (Non-Hispanic) | 149,879 | 59.1% |
| Black / African American | 70,203 | 27.7% |
| Two or More Races | 14,840 | 5.8% |
| Hispanic or Latino | 12,858 | 5.1% |
| Asian | 4,098 | 1.6% |
| Other Race | 1,391 | 0.5% |
| Native American | 382 | 0.2% |
| Pacific Islander | 43 | 0.0% |
Diversity & Demographics FAQs for St. Clair County, Illinois
The largest racial or ethnic group in St. Clair County, Illinois is White (Non-Hispanic), which makes up 59.1% of the total population.
Since 2010, the diversity index for St. Clair County, Illinois has increased significantly. The area currently has a diversity score of 56.8/100, which is considered a Moderate level of diversity.