Population By Race and Ethnicity in St. Clair County, IL in 2015

Updated on January 29, 2024.

Based on the US Census Vintage data estimates, in 2015, the 265,008 population of St. Clair County, Illinois comprised of 10,311 people who identified as Hispanic (3.89%), and 254,697 people who identified as Non-Hispanic (96.11%).

Race: The White Alone population was the largest racial group in St. Clair County, Illinois with a population of 173,525 (65.48%); Black or African American Alone population was the second largest racial group with a population of 80,486 (30.37%); and Two Or More Races was the third largest racial group with a population of 6,172 (2.33%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in St. Clair County, Illinois in 2015, with a population of 165,042 (62.28%); the second largest ethnic group was Black or African American Alone - Non Hispanic with a population of 79,703 (30.08%); and the third largest ethnic group was White Alone - Hispanic with a population of 8,483 (3.2%).

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 2015
Total Population:
Race in St. Clair County, IL in 2015
Total Population:
Ethnicity in St. Clair County, IL in 2015
Total Population:
Population By Race in St. Clair , IL in 2015
Race Population Percentage
Black or African American Alone 80,486 30.37%
White Alone 173,525 65.48%
American Indian and Alaska Native Alone 885 0.33%
Asian Alone 3,661 1.38%
Native Hawaiian And Pacific Islander Alone 279 0.11%
Two Or More Races 6,172 2.33%
Population By Ethnicity in St. Clair , IL in 2015
Ethnicity Population Percentage
Black or African American Alone - Hispanic 783 0.3%
White Alone - Hispanic 8,483 3.2%
American Indian and Alaska Native Alone - Hispanic 303 0.11%
Asian Alone - Hispanic 138 0.05%
Native Hawaiian And Pacific Islander Alone - Hispanic 43 0.02%
Two Or More Races - Hispanic 561 0.21%
Black or African American Alone - Non Hispanic 79,703 30.08%
White Alone - Non Hispanic 165,042 62.28%
American Indian and Alaska Native Alone - Non Hispanic 582 0.22%
Asian Alone - Non Hispanic 3,523 1.33%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 236 0.09%
Two Or More Races - Non Hispanic 5,611 2.12%