Population By Race and Ethnicity in St. Clair County, IL in 2023

Updated on August 1, 2024.

Based on the US Census Vintage data estimates, in 2023, the 251,018 population of St. Clair County, Illinois comprised of 12,988 people who identified as Hispanic (5.17%), and 238,030 people who identified as Non-Hispanic (94.83%).

Race: The White Alone population was the largest racial group in St. Clair County, Illinois with a population of 161,560 (64.36%); Black or African American Alone population was the second largest racial group with a population of 76,713 (30.56%); and Two Or More Races was the third largest racial group with a population of 7,405 (2.95%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in St. Clair County, Illinois in 2023, with a population of 150,832 (60.09%); the second largest ethnic group was Black or African American Alone - Non Hispanic with a population of 75,803 (30.2%); and the third largest ethnic group was White Alone - Hispanic with a population of 10,728 (4.27%).

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 County, IL in 2023
Total Population:
Race in St. Clair County, IL in 2023
Total Population:
Ethnicity in St. Clair County, IL in 2023
Total Population:
Population By Race in St. Clair , IL in 2023
Race Population Percentage
Black or African American Alone 76,713 30.56%
White Alone 161,560 64.36%
American Indian and Alaska Native Alone 1,013 0.4%
Asian Alone 4,075 1.62%
Native Hawaiian And Pacific Islander Alone 252 0.1%
Two Or More Races 7,405 2.95%
Population By Ethnicity in St. Clair , IL in 2023
Ethnicity Population Percentage
Black or African American Alone - Hispanic 910 0.36%
White Alone - Hispanic 10,728 4.27%
American Indian and Alaska Native Alone - Hispanic 390 0.16%
Asian Alone - Hispanic 143 0.06%
Native Hawaiian And Pacific Islander Alone - Hispanic 41 0.02%
Two Or More Races - Hispanic 776 0.31%
Black or African American Alone - Non Hispanic 75,803 30.2%
White Alone - Non Hispanic 150,832 60.09%
American Indian and Alaska Native Alone - Non Hispanic 623 0.25%
Asian Alone - Non Hispanic 3,932 1.57%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 211 0.08%
Two Or More Races - Non Hispanic 6,629 2.64%