McHenry County, Illinois
AkashicMcHenry County, ILTrumpR+5.3
2024 precinct map of McHenry CountyPrecinct-level 2024 presidential results for McHenry County, with each precinct boundary colored by Democratic-vs-Republican margin, and gold where an independent or third-party candidate carried the precinct.
How it voted
Share of the 2024 vote
| Donald Trump ✓Republican | 51.7% | 83,933 |
|---|---|---|
| Kamala HarrisDemocratic | 46.4% | 75,370 |
| Robert F Kennedy Jr.Independent | 1.5% | 2,396 |
Harris +50Trump +50
223 precincts · 162,283 votes. Hover any precinct for its result.
The precinct map shows the 2024 presidential vote; the timeline scrubs the county’s overall result across 1892–2024.
38 presidential elections
| Year | Won | Democratic | Republican | Other | Margin | Total |
|---|---|---|---|---|---|---|
| R | 46.4%Harris75,370 | 51.7%Trump83,933 | 1.5%Kennedy2,396 | 162,283 | ||
| R | 47.5%Biden78,154 | 50.0%Trump82,260 | 1.3%Jorgensen2,176 | 164,578 | ||
| R | 42.2%Clinton60,803 | 49.8%Trump71,612 | 5.0%Johnson7,180 | 143,930 | ||
| R | 44.5%Obama59,797 | 53.3%Romney71,598 | 1.3%JOHNSON1,682 | 134,237 | ||
| D | 51.9%Obama72,288 | 46.6%McCain64,845 | 1.5%Nader2,135 | 139,268 | ||
| R | 39.3%Kerry50,330 | 59.7%Bush76,412 | 0.9%Badnarik1,206 | 127,948 | ||
| R | 38.3%Gore40,698 | 58.5%Bush62,112 | 2.6%Nader2,751 | 106,185 | ||
| R | 37.5%Clinton31,240 | 49.4%Dole41,136 | 12.1%Perot10,082 | 83,256 | ||
| R | 28.1%Clinton24,783 | 46.8%Bush41,356 | 24.7%Perot21,817 | 88,294 | ||
| R | 28.9%Dukakis18,919 | 70.4%Bush46,135 | 0.7%Paul445 | 65,499 | ||
| R | 23.2%Mondale14,420 | 76.2%Reagan47,282 | 0.5%Bergland340 | 62,042 | ||
| R | 23.6%Carter14,540 | 65.0%Reagan40,045 | 11.5%Anderson7,070 | 61,655 | ||
| R | 30.5%Carter16,799 | 67.5%Ford37,115 | 2.0%McCarthy1,075 | 54,989 | ||
| R | 25.0%McGovern12,090 | 74.8%Nixon36,114 | 0.2%Schmitz108 | 48,312 | ||
| R | 26.5%Humphrey10,896 | 66.2%Nixon27,245 | 7.4%Wallace3,044 | 41,185 | ||
| R | 44.5%Johnson18,014 | 55.5%Goldwater22,503 | 0.0% | 40,517 | ||
| R | 32.9%Kennedy12,659 | 67.0%Nixon25,787 | 0.2%Byrd62 | 38,508 | ||
| R | 21.4%Stevenson6,820 | 78.3%Eisenhower24,912 | 0.2%Andrews66 | 31,798 | ||
| R | 25.5%Stevenson7,218 | 74.2%Eisenhower20,975 | 0.2%Hallinan64 | 28,257 | ||
| R | 26.1%Truman5,459 | 73.4%Dewey15,387 | 0.5%Thurmond103 | 20,949 | ||
| R | 26.1%Roosevelt5,567 | 73.6%Dewey15,666 | 0.3%Thomas66 | 21,299 | ||
| R | 27.1%Roosevelt6,170 | 72.3%Willkie16,480 | 0.6%Thomas145 | 22,795 | ||
| R | 34.7%Roosevelt6,893 | 60.6%Landon12,031 | 4.7%Lemke942 | 19,866 | ||
| R | 44.4%Roosevelt8,260 | 53.1%Hoover9,880 | 2.4%Thomas454 | 18,594 | ||
| R | 34.3%Smith5,596 | 65.3%Hoover10,661 | 0.4%Thomas62 | 16,319 | ||
| R | 10.5%Davis1,372 | 67.2%Coolidge8,751 | 22.2%La Follette2,892 | 13,015 | ||
| R | 13.2%Cox1,536 | 85.1%Harding9,885 | 1.7%Debs195 | 11,616 | ||
| R | 26.2%Wilson3,278 | 72.0%Hughes9,024 | 1.8%Benson230 | 12,532 | ||
| O | 25.7%Wilson1,913 | 31.8%Taft2,370 | 42.5%Roosevelt3,164 | 7,447 | ||
| R | 25.2%Bryan1,887 | 71.1%Taft5,331 | 3.8%Debs283 | 7,501 | ||
| R | 18.7%Parker1,309 | 77.2%Roosevelt5,409 | 4.1%Debs288 | 7,006 | ||
| R | 27.8%Bryan2,076 | 70.1%McKinley5,234 | 2.1%Woolley158 | 7,468 | ||
| R | 26.9%Bryan1,913 | 70.9%McKinley5,047 | 2.2%Palmer157 | 7,117 | ||
| R | 39.8%Cleveland2,311 | 55.2%Harrison3,205 | 5.1%Weaver294 | 5,810 | ||
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presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −15.4% |
| 1896 | −44.0% |
| 1900 | −42.3% |
| 1904 | −58.5% |
| 1908 | −45.9% |
| 1912 | −6.1% |
| 1916 | −45.9% |
| 1920 | −71.9% |
| 1924 | −56.7% |
| 1928 | −31.0% |
| 1932 | −8.7% |
| 1936 | −25.9% |
| 1940 | −45.2% |
| 1944 | −47.4% |
| 1948 | −47.4% |
| 1952 | −48.7% |
| 1956 | −56.9% |
| 1960 | −34.1% |
| 1964 | −11.1% |
| 1968 | −39.7% |
| 1972 | −49.7% |
| 1976 | −36.9% |
| 1980 | −41.4% |
| 1984 | −53.0% |
| 1988 | −41.6% |
| 1992 | −18.8% |
| 1996 | −11.9% |
| 2000 | −20.2% |
| 2004 | −20.4% |
| 2008 | +5.3% |
| 2012 | −8.8% |
| 2016 | −7.5% |
| 2020 | −2.5% |
| 2024 | −5.3% |
DemocraticRepublican
voter registration
Registered voters
Total registered voters, over time
Registered voters
| Year | Total registered |
|---|---|
| 2016 | 229,433 |
| 2018 | 244,460 |
| 2020 | 239,316 |
| 2022 | 259,487 |
| 2024 | 239,261 |
Source: U.S. Election Assistance Commission (EAVS)
A fast-growing exurban county northwest of Chicago, McHenry shifted from R+20 margins a decade ago to R+5.3 in 2024, reflecting the broader realignment of college-educated suburban voters across the collar counties.
Across the recorded series it reached a Democratic high of 5.3 points in 2008 and a Republican high of 71.9 points in 1920. Between 2020 and 2024 the county moved 2.8 points toward the Republican candidate; the 2024 margin was 5.3 points.
A population of 312,591, a 76% non-Hispanic-white share, and a median household income of $104,802 describe the county. The county's voting pattern over the last decade is most similar to that of New Hanover County and Kendall County.
Most similar counties
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
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All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
McHenry County, Illinois. Akashic. https://akashic.app/county/17111/. Accessed May 20, 2026. License: CC BY 4.0.
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Cities & towns in McHenry County
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Frequently asked questions
How did McHenry County, Illinois vote in 2024?
In 2024, McHenry County, Illinois voted Republican by 5.3 points (R+5.3), carried by the Republican candidate. Out of 162,283 votes cast, 75,370 went Democratic and 83,933 went Republican.
When did McHenry County, Illinois last vote Democratic?
The most recent presidential election in which McHenry County, Illinois voted Democratic was 2008.
How many people live in McHenry County, Illinois?
McHenry County, Illinois has a population of 312,591 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in McHenry County, Illinois?
Median household income in McHenry County, Illinois is $104,802 — above the national median of $80,734. The Illinois state median is $83,390.
What is the political history of McHenry County, Illinois?
Akashic tracks 38 presidential elections in McHenry County, Illinois from 1876 to 2024. Of those, 1 went Democratic and 32 went Republican.