McHenry County, Illinois Citizen Voting-age Population By Race and Ethnicity in 2020 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2020, the citizen voting-age population for McHenry County, IL was 223.28K. The Non-Hispanic White Alone ethnicity group had the highest citizen voting-age population (194.07K) and constituted 86.92% of the total.

The Hispanic or Latino of All Races ethnicity group had the second highest citizen voting-age population (18.70K) and constituted 8.38% of the total. The Non-Hispanic Asian Alone ethnicity group had the third highest (5.25K), constituting 2.35% 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 2020

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 2020

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Ethnicity	Voting-age Population	% of Voting-age Pop.
Non-Hispanic White Alone	194065	86.92
Hispanic or Latino of All Races	18705	8.38
Non-Hispanic Asian Alone	5250	2.35
Non-Hispanic Black or African American Alone	2785	1.25
Non-Hispanic Two Or More Races	2345	1.05
Non-Hispanic American Indian and Alaska Native Alone	135	0.06