Henry County, Illinois: Republican loyalist county. In 2024, voted R+24%. Republican peak: R+63 in 1920.
Key facts
- 2024 presidential margin
- R+24MIT Election Lab
- Political archetype
- Republican loyalistAkashic 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.
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
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.
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.
Median household income
2024 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
Source · American Community Survey 5-year estimates, 2024 release.
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.
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.
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 in Henry County reached its widest at sixty-three points in 1920. The margin in 2024 was twenty-four points, in line with the county's deep historical pattern.
Its loyalty is rooted in its place. Median household income of $71,911, a 88% non-Hispanic-white share, and a population of 48,643 together describe a community whose political habits are deeply settled. The county's voting pattern over the last decade is most similar to that of Lincoln County and Louisa County.
Most similar counties
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Henry County, Illinois — The Long Memory. Akashic Intelligence — The Long Memory. https://akashic.app/county/17073/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More republican loyalist counties
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 archetype?
Akashic classifies Henry County, Illinois as a "Republican loyalist" county based on its long-arc presidential voting pattern. 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 archetype — "Republican loyalist" — captures the overall trajectory of that voting record.