McHenry County, Illinois Citizen Voting-age Population By Race and Ethnicity in 2021 (ACS-5Yrs)

Updated on March 26, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2021, the citizen voting-age population for McHenry County, IL was 225.44K. The Non-Hispanic White Alone ethnicity group had the highest citizen voting-age population (195.06K) and constituted 86.53% of the total.

The Hispanic or Latino of All Races ethnicity group had the second highest citizen voting-age population (19.56K) and constituted 8.67% of the total. The Non-Hispanic Asian Alone ethnicity group had the third highest (5.19K), constituting 2.30% of the total citizen voting-age population.

The charts and tables below shows the citizen voting-age population and percentages by race and ethnicity.

You can also see similar information for other Illinois counties, and for Illinois.

Data Source: US Census - ACS 5-Years (CVAP).

See this for other years:

McHenry County, Illinois Citizen Voting-age Population By Race and Ethnicity in 2021

Non-Hispanic White Alone

Hispanic or Latino of All Races

Non-Hispanic Asian Alone

Non-Hispanic Black Alone

Non-Hispanic Two Or More Races

Non-Hispanic American Indian & Alaska Native Alone

McHenry County, Illinois Citizen Voting-age Population By Race and Ethnicity in 2021

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Ethnicity	Voting-age Population	% of Voting-age Pop.
Non-Hispanic White Alone	195060	86.53
Hispanic or Latino of All Races	19555	8.67
Non-Hispanic Asian Alone	5185	2.30
Non-Hispanic Black or African American Alone	3055	1.36
Non-Hispanic Two Or More Races	2460	1.09
Non-Hispanic American Indian and Alaska Native Alone	120	0.05