Population By Race and Ethnicity in Mchenry, IL in 2020

Updated on June 16, 2025.

Based on the US Census Vintage data estimates, in 2020, the 309,882 population of Mchenry County, Illinois comprised of 46,846 people who identified as Hispanic (15.12%), and 263,036 people who identified as Non-Hispanic (84.88%).

Race: The White Alone population was the largest racial group in Mchenry County, Illinois with a population of 287,776 (92.87%); Asian Alone population was the second largest racial group with a population of 9,345 (3.02%); and Black or African American Alone was the third largest racial group with a population of 5,553 (1.79%).

Ethnicity: The White Alone - Non Hispanic population was the largest ethnic group in Mchenry County, Illinois in 2020, with a population of 244,283 (78.83%); the second largest ethnic group was White Alone - Hispanic with a population of 43,493 (14.04%); and the third largest ethnic group was Asian Alone - Non Hispanic with a population of 9,041 (2.92%).

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

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

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Hispanics and Non Hispanics in Mchenry, IL in 2020
Total Population:
Race in Mchenry, IL in 2020
Total Population:
Ethnicity in Mchenry, IL in 2020
Total Population:
Population By Race in Mchenry , IL in 2020
Race Population Percentage
Black or African American Alone 5,553 1.79%
White Alone 287,776 92.87%
American Indian and Alaska Native Alone 1,729 0.56%
Asian Alone 9,345 3.02%
Native Hawaiian And Pacific Islander Alone 173 0.06%
Two Or More Races 5,306 1.71%
Population By Ethnicity in Mchenry , IL in 2020
Ethnicity Population Percentage
Black or African American Alone - Hispanic 762 0.25%
White Alone - Hispanic 43,493 14.04%
American Indian and Alaska Native Alone - Hispanic 1,258 0.41%
Asian Alone - Hispanic 304 0.1%
Native Hawaiian And Pacific Islander Alone - Hispanic 60 0.02%
Two Or More Races - Hispanic 969 0.31%
Black or African American Alone - Non Hispanic 4,791 1.55%
White Alone - Non Hispanic 244,283 78.83%
American Indian and Alaska Native Alone - Non Hispanic 471 0.15%
Asian Alone - Non Hispanic 9,041 2.92%
Native Hawaiian And Pacific Islander Alone - Non Hispanic 113 0.04%
Two Or More Races - Non Hispanic 4,337 1.4%