Population By Race and Ethnicity in St. Clair County, IL in 2021

Updated on August 1, 2024.

Based on the US Census Vintage data estimates, in 2021, the 254,958 population of St. Clair County, Illinois comprised of 12,611 people who identified as Hispanic (4.95%), and 242,347 people who identified as Non-Hispanic (95.05%).

Race: The White Alone population was the largest racial group in St. Clair County, Illinois with a population of 164,309 (64.45%); Black or African American Alone population was the second largest racial group with a population of 78,265 (30.7%); and Two Or More Races was the third largest racial group with a population of 7,153 (2.81%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in St. Clair County, Illinois in 2021, with a population of 153,905 (60.37%); the second largest ethnic group was Black or African American Alone - Non Hispanic with a population of 77,349 (30.34%); and the third largest ethnic group was White Alone - Hispanic with a population of 10,404 (4.08%).

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.

Data Source: US Census Bureau (Vintage).

See this for other years:

Hispanics and Non Hispanics in St. Clair County, IL in 2021

Total Population:254,958

Non Hispanic (95.05%)

Hispanic (4.95%)

Race in St. Clair County, IL in 2021

Total Population:254,958

White Alone (64.45%)

Black or African American Alone (30.7%)

Two or more races (2.81%)

Asian Alone (1.56%)

American Indian and Alaska Native Alone (0.39%)

Native Hawaiian And Pacific Islander Alone (0.1%)

Ethnicity in St. Clair County, IL in 2021

Total Population:254,958

Non-Hispanic White Alone (60.37%)

Non-Hispanic Black or African American Alone (30.34%)

Hispanic White Alone (4.08%)

Non-Hispanic Two or more races (2.52%)

Non-Hispanic Asian Alone (1.5%)

All Other Ethnicities (1.19%)

Population By Race in St. Clair , IL in 2021

Race	Population	Percentage
White Alone	164,309	64.45%
Black or African American Alone	78,265	30.7%
Two Or More Races	7,153	2.81%
Asian Alone	3,980	1.56%
American Indian and Alaska Native Alone	1,004	0.39%
Native Hawaiian And Pacific Islander Alone	247	0.1%

Population By Ethnicity in St. Clair , IL in 2021

Ethnicity	Population	Percentage
White Alone - Non Hispanic	153,905	60.37%
Black or African American Alone - Non Hispanic	77,349	30.34%
White Alone - Hispanic	10,404	4.08%
Two Or More Races - Non Hispanic	6,435	2.52%
Asian Alone - Non Hispanic	3,832	1.5%
Black or African American Alone - Hispanic	916	0.36%
Two Or More Races - Hispanic	718	0.28%
American Indian and Alaska Native Alone - Non Hispanic	620	0.24%
American Indian and Alaska Native Alone - Hispanic	384	0.15%
Native Hawaiian And Pacific Islander Alone - Non Hispanic	206	0.08%
Asian Alone - Hispanic	148	0.06%
Native Hawaiian And Pacific Islander Alone - Hispanic	41	0.02%