Population By Race and Ethnicity in St. Clair County, IL in 2019

Updated on January 29, 2024.

Based on the US Census Vintage data estimates, in 2019, the 259,889 population of St. Clair County, Illinois comprised of 11,270 people who identified as Hispanic (4.34%), and 248,619 people who identified as Non-Hispanic (95.66%).

Race: The White Alone population was the largest racial group in St. Clair County, Illinois with a population of 168,176 (64.71%); Black or African American Alone population was the second largest racial group with a population of 79,581 (30.62%); and Two Or More Races was the third largest racial group with a population of 6,885 (2.65%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in St. Clair County, Illinois in 2019, with a population of 158,899 (61.14%); the second largest ethnic group was Black or African American Alone - Non Hispanic with a population of 78,764 (30.31%); and the third largest ethnic group was White Alone - Hispanic with a population of 9,277 (3.57%).

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 2019
Total Population:
Race in St. Clair County, IL in 2019
Total Population:
Ethnicity in St. Clair County, IL in 2019
Total Population:
Population By Race in St. Clair , IL in 2019
Race Population Percentage
Black or African American Alone 79,581 30.62%
White Alone 168,176 64.71%
American Indian and Alaska Native Alone 987 0.38%
Asian Alone 4,010 1.54%
Native Hawaiian And Pacific Islander Alone 250 0.1%
Two Or More Races 6,885 2.65%
Population By Ethnicity in St. Clair , IL in 2019
Ethnicity Population Percentage
Black or African American Alone - Hispanic 817 0.31%
White Alone - Hispanic 9,277 3.57%
American Indian and Alaska Native Alone - Hispanic 339 0.13%
Asian Alone - Hispanic 138 0.05%
Native Hawaiian And Pacific Islander Alone - Hispanic 33 0.01%
Two Or More Races - Hispanic 666 0.26%
Black or African American Alone - Non Hispanic 78,764 30.31%
White Alone - Non Hispanic 158,899 61.14%
American Indian and Alaska Native Alone - Non Hispanic 648 0.25%
Asian Alone - Non Hispanic 3,872 1.49%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 217 0.08%
Two Or More Races - Non Hispanic 6,219 2.39%