Population By Race and Ethnicity in St Clair, IL in 2011

Updated on June 16, 2025.

Based on the US Census Vintage data estimates, in 2011, the 270,097 population of St Clair County, Illinois comprised of 9,250 people who identified as Hispanic (3.43%), and 260,847 people who identified as Non-Hispanic (96.58%).

Race: The White Alone population was the largest racial group in St Clair County, Illinois with a population of 177,518 (65.72%); Black or African American Alone population was the second largest racial group with a population of 82,460 (30.53%); and Two Or More Races was the third largest racial group with a population of 5,652 (2.09%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in St Clair County, Illinois in 2011, with a population of 169,843 (62.88%); the second largest ethnic group was Black or African American Alone - Non Hispanic with a population of 81,771 (30.28%); and the third largest ethnic group was White Alone - Hispanic with a population of 7,675 (2.84%).

The charts and tables below shows the population and percentage of each racial and ethnicity group in St Clair, Illinois.

You can find similar information for other Illinois counties, and for Illinois.

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Hispanics and Non Hispanics in St Clair, IL in 2011
Total Population:
Race in St Clair, IL in 2011
Total Population:
Ethnicity in St Clair, IL in 2011
Total Population:
Population By Race in St Clair , IL in 2011
Race Population Percentage
Black or African American Alone 82,460 30.53%
White Alone 177,518 65.72%
American Indian and Alaska Native Alone 811 0.3%
Asian Alone 3,411 1.26%
Native Hawaiian And Pacific Islander Alone 245 0.09%
Two Or More Races 5,652 2.09%
Population By Ethnicity in St Clair , IL in 2011
Ethnicity Population Percentage
Black or African American Alone - Hispanic 689 0.26%
White Alone - Hispanic 7,675 2.84%
American Indian and Alaska Native Alone - Hispanic 264 0.1%
Asian Alone - Hispanic 124 0.05%
Native Hawaiian And Pacific Islander Alone - Hispanic 27 0.01%
Two Or More Races - Hispanic 471 0.17%
Black or African American Alone - Non Hispanic 81,771 30.28%
White Alone - Non Hispanic 169,843 62.88%
American Indian and Alaska Native Alone - Non Hispanic 547 0.2%
Asian Alone - Non Hispanic 3,287 1.22%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 218 0.08%
Two Or More Races - Non Hispanic 5,181 1.92%