Race, Diversity, and Ethnicity in St. Clair County, IL

The map below shows majority race by area in St. Clair County, as self-identified on the US census. Darker shades indicate a larger racial majority in that neighborhood. This page also contains data and maps on St. Clair County racial diversity and diversity scores. Click here to scroll to diversity data.

St. Clair County, IL map of race and ethnicity
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White
Hispanic
Black
Asian
Multiple/Other
WhiteHispanicBlackAsianMultiple/Other
Majority race by area

The majority race in St. Clair County overall is white, making up 61.1% of residents. The next most-common racial group is black at 25.6%. There are more white people in the southwest areas of the county. People who identify as black are most likely to be living in the northwest places. The data below shows how many people identify themselves as each of the following races, which most Americans base on their family's national origin:

Race in St. Clair County

 
Self-Identified Race
St. Clair County, IL Population
White
61.1%
Hispanic
5.1%
Black
25.6%
Asian
1.7%
Native American
0.2%
Other
6.4%
   

Diversity and Diversity Scores for St. Clair County, IL

The map below shows diversity in St. Clair County. Areas in green are more diverse, while areas in red are much less diverse. Diversity, in this case, means a mixture of people with different race and ethnicity living close to one another. For example, all-black and all-white areas in the county would both be considered lacking diversity.

St. Clair County, IL map of race and ethnicity
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St. Clair County Diversity Score

55.4

More diverse than 84% of US counties

St. Clair County has a diversity score of 55.4: the chance, in percent, that two residents picked at random belong to different racial or ethnic groups, from ACS race counts. A place where everyone shares one group scores 0, and an even mix of the six groups in the chart above scores the maximum, 83.3. St. Clair County is much more diverse than other US counties, more diverse than 84% of them. Within St. Clair County's proper boundaries, the most diverse area is west St. Clair County, and the least diverse areas are in southwest St. Clair County.

Source: BestNeighborhood calculations from the U.S. Census Bureau, American Community Survey (ACS) 2020-2024 5-year estimates (race and Hispanic origin); proprietary data mapping and analysis. Special thanks to the University of Virginia.

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