Henry County, Illinois: Farm Belt county. In 2024, voted R+24%. Republican peak: R+63 in 1920.
Key facts
- 2024 presidential margin
- R+24MIT Election Lab
- Political typology
- Farm BeltAkashic typology
- Population
- 48,6432024 5-year
- Median household income
- $71,9112024 5-year
- White (non-Hispanic)
- 87.9%2024 5-year
- Black
- 1.1%2024 5-year
- Hispanic / Latino
- 6.9%2024 5-year
- Peak Democratic margin
- D+13 in 1996MIT Election Lab
- Peak Republican margin
- R+63 in 1920MIT Election Lab
- Most similar
- Lincoln County, WI · similarity 0.98
2024 results by precinct
2024 precinct map of Henry CountyPrecinct-level 2024 presidential results for Henry County, with each precinct boundary colored by Democratic-vs-Republican margin.
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Margin—
Turnout—
Harris +50Trump +50
Real precinct boundaries. Hover for vote totals.
presidential history
Presidential margin, 1876–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1876 | No data |
| 1880 | No data |
| 1884 | No data |
| 1888 | No data |
| 1892 | −20.9% |
| 1896 | −34.3% |
| 1900 | −40.6% |
| 1904 | −60.4% |
| 1908 | −39.3% |
| 1912 | +3.9% |
| 1916 | −35.5% |
| 1920 | −62.8% |
| 1924 | −61.7% |
| 1928 | −42.5% |
| 1932 | −5.6% |
| 1936 | −1.9% |
| 1940 | −17.5% |
| 1944 | −19.4% |
| 1948 | −18.4% |
| 1952 | −31.1% |
| 1956 | −31.1% |
| 1960 | −15.9% |
| 1964 | +6.3% |
| 1968 | −17.9% |
| 1972 | −27.7% |
| 1976 | −13.2% |
| 1980 | −27.0% |
| 1984 | −15.1% |
| 1988 | +1.0% |
| 1992 | +8.6% |
| 1996 | +12.8% |
| 2000 | +4.4% |
| 2004 | −5.3% |
| 2008 | +7.7% |
| 2012 | +3.1% |
| 2016 | −20.8% |
| 2020 | −21.4% |
| 2024 | −24.4% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 9,226 | 15,359 | 25,092 | ||
| R | 9,797 | 15,300 | 25,701 | ||
| R | 8,871 | 13,985 | 24,643 | ||
| D | 12,332 | 11,583 | 24,405 | ||
| D | 13,181 | 11,263 | 24,785 | ||
| R | 11,877 | 13,212 | 25,241 | ||
| D | 11,921 | 10,896 | 23,470 | ||
| D | 11,201 | 8,393 | 21,897 | ||
| D | 11,077 | 8,989 | 24,371 | ||
| D | 11,594 | 11,358 | 23,048 | ||
| R | 10,679 | 14,504 | 25,262 | ||
| R | 7,977 | 14,506 | 24,206 | ||
| R | 9,822 | 12,849 | 22,934 | ||
| R | 8,368 | 14,796 | 23,185 | ||
| R | 8,455 | 12,524 | 22,731 | ||
| D | 12,085 | 10,644 | 22,729 | ||
| R | 10,372 | 14,297 | 24,690 | ||
| R | 8,349 | 15,896 | 24,284 | ||
| R | 8,558 | 16,301 | 24,892 | ||
| R | 8,489 | 12,363 | 21,011 | ||
| R | 9,130 | 13,539 | 22,761 | ||
| R | 10,481 | 14,971 | 25,648 | ||
| R | 11,490 | 11,953 | 24,094 | ||
| R | 10,122 | 11,376 | 22,199 | ||
| R | 5,858 | 14,666 | 20,707 | ||
| R | 1,944 | 13,159 | 18,179 | ||
| R | 2,530 | 12,379 | 15,677 | ||
| R | 5,220 | 11,406 | 17,422 | ||
| O | 2,219 | 1,859 | 9,163 | ||
| R | 2,499 | 6,387 | 9,897 | ||
| R | 1,390 | 7,331 | 9,838 | ||
| R | 2,809 | 6,892 | 10,055 | ||
| R | 2,971 | 6,177 | 9,355 | ||
| R | 2,670 | 4,265 | 7,640 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
22.8%
Irish
12.2%
English
10.7%
American
6.0%
Italian
3.0%
Polish
2.6%
Scottish
1.9%
African American
0.9%
Multiple ancestry combinations reported; no single grouping above 1%.
Sample size too small to break out by ancestry reliably.
American Indian, Alaska Native, Native Hawaiian, and Pacific Islander combined.
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
2024 ACS
Age distribution by sex
Median age: 43.6 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Median household income
Inflation-adjusted dollars
$71,911
Henry County ranks near the middle of US counties.
Henry County$71,911
Illinois$83,390
United States$80,734
Henry County ranks near the middle of US counties by median household income.
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Poverty rate
All persons below federal poverty line
8.9%
Child poverty is below the national average.
Children under 1810.5%
Working age (18–64)8.0%
Seniors (65+)12.1%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
95.5%
speak English only
Spanish3.6%
Other Indo-European0.6%
Asian & Pacific Islander0.2%
Other languages0.1%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 56.4% of residents not counted as adherents by any reporting body.
Henry County's population has declined slowly as its agricultural economy consolidates, and its presidential margins have shifted roughly 20 points toward Republicans over the past four election cycles, reflecting a broader rural realignment across the Illinois River corridor.
The Republican margin here reached sixty-three points in 1920. Between 2020 and 2024 the county moved three points toward the Republican candidate; the 2024 margin was twenty-four points.
A population of 48,643, a 88% non-Hispanic-white share, and a median household income of $71,911 describe an agricultural county. The county's voting pattern over the last decade is most similar to that of Lincoln County and Louisa 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 →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Henry County, Illinois. Akashic. https://akashic.app/county/17073/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
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Frequently asked questions
How did Henry County, Illinois vote in 2024?
In 2024, Henry County, Illinois voted Republican by 24.4 points (R+24), carried by the Republican candidate. Out of 25,092 votes cast, 9,226 went Democratic and 15,359 went Republican.
What is Henry County, Illinois's political typology?
Akashic places Henry County, Illinois in the "Farm Belt" typology — Rural Plains and Midwest farm counties — Republican, with modest recent movement. The typology is a data-driven cluster built from vote share, vote swing, race and ethnicity, income, language spoken at home, religion, and ancestry. Across 38 elections in the dataset, the county has voted Democratic 7 times, Republican 26 times, and other 1 times.
When did Henry County, Illinois last vote Democratic?
The most recent presidential election in which Henry County, Illinois voted Democratic was 2012.
How many people live in Henry County, Illinois?
Henry County, Illinois has a population of 48,643 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Henry County, Illinois?
Median household income in Henry County, Illinois is $71,911 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Henry County, Illinois?
Akashic tracks 38 presidential elections in Henry County, Illinois from 1876 to 2024. Of those, 7 went Democratic and 26 went Republican. The county's typology — "Farm Belt" — captures where that record, its demographics, and its recent swing place it among American communities.