Madison County, Illinois: Republican loyalist county. In 2024, voted R+13%. Democratic peak: D+37 in 1964.
Key facts
- 2024 presidential margin
- R+13MIT Election Lab
- Political archetype
- Republican loyalistAkashic typology
- Population
- 264,2382024 5-year
- Median household income
- $75,7932024 5-year
- White (non-Hispanic)
- 83.0%2024 5-year
- Black
- 7.8%2024 5-year
- Hispanic / Latino
- 4.3%2024 5-year
- Peak Democratic margin
- D+37 in 1964MIT Election Lab
- Peak Republican margin
- R+27 in 1920MIT Election Lab
- Most similar
- Lake County, MI · similarity 0.95
2024 results by precinct
2024 precinct map of Madison CountyPrecinct-level 2024 presidential results for Madison 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 | 56,341 | 73,925 | 133,072 | ||
| R | 57,836 | 76,031 | 137,558 | ||
| R | 50,587 | 70,490 | 130,179 | ||
| R | 58,922 | 60,608 | 122,885 | ||
| D | 68,979 | 57,177 | 128,334 | ||
| D | 63,399 | 59,384 | 123,678 | ||
| D | 59,077 | 48,821 | 111,104 | ||
| D | 53,568 | 35,758 | 100,573 | ||
| D | 58,484 | 32,167 | 114,095 | ||
| D | 54,175 | 44,907 | 99,695 | ||
| R | 48,352 | 57,021 | 105,713 | ||
| R | 43,860 | 51,160 | 100,124 | ||
| D | 56,457 | 44,183 | 101,998 | ||
| R | 43,289 | 55,385 | 99,116 | ||
| D | 46,384 | 39,622 | 101,129 | ||
| D | 65,115 | 30,009 | 95,124 | ||
| D | 54,787 | 42,984 | 97,904 | ||
| D | 47,897 | 39,413 | 87,398 | ||
| D | 50,734 | 36,206 | 87,039 | ||
| D | 40,897 | 25,059 | 66,306 | ||
| D | 40,114 | 28,399 | 68,872 | ||
| D | 44,803 | 30,445 | 75,929 | ||
| D | 42,172 | 22,073 | 65,686 | ||
| D | 35,211 | 19,774 | 57,238 | ||
| R | 23,658 | 28,028 | 52,406 | ||
| R | 12,863 | 19,926 | 41,851 | ||
| R | 10,149 | 19,249 | 33,292 | ||
| R | 16,302 | 17,594 | 35,274 | ||
| D | 7,155 | 5,462 | 17,868 | ||
| R | 7,812 | 9,463 | 18,503 | ||
| R | 5,429 | 9,009 | 15,771 | ||
| R | 6,753 | 8,106 | 15,190 | ||
| R | 6,344 | 7,431 | 13,952 | ||
| D | 5,680 | 5,355 | 11,669 | ||
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Demographics
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
26.6%
Irish
13.3%
English
13.1%
American
4.9%
Italian
4.7%
Polish
2.4%
French
2.3%
African American
6.2%
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: 40.2 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
$75,793
Madison County ranks in the top 25% of US counties.
Madison County$75,793
Illinois$83,390
United States$80,734
Source · American Community Survey 5-year estimates, 2024 release.
Poverty rate
All persons below federal poverty line
11.1%
Child poverty is below the national average.
Children under 1813.2%
Working age (18–64)10.6%
Seniors (65+)9.1%
Source · American Community Survey 5-year estimates, 2024 release.
Language at home
Population aged 5 and older
96.4%
speak English only
Spanish2.2%
Other Indo-European0.7%
Asian & Pacific Islander0.5%
Other languages0.3%
Source · ACS 5-year estimates, 2024.
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 52.3% of residents not counted as adherents by any reporting body.
Madison County sits across the Mississippi from St. Louis and was reliably competitive into the 2000s, but its largely white working-class electorate has moved toward Republican margins now exceeding 13 points in presidential contests.
The Republican margin in Madison County reached its widest at twenty-seven points in 1920. The margin in 2024 was thirteen points, in line with the county's deep historical pattern.
Its loyalty is rooted in its place. Median household income of $75,793, a 83% non-Hispanic-white share, and a population of 264,238 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 Lake County and Fulton County.
Most similar counties
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Madison County, Illinois — The Long Memory. Akashic Intelligence — The Long Memory. https://akashic.app/county/17119/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More republican loyalist counties
Frequently asked questions
How did Madison County, Illinois vote in 2024?
In 2024, Madison County, Illinois voted Republican by 13.2 points (R+13), carried by the Republican candidate. Out of 133,072 votes cast, 56,341 went Democratic and 73,925 went Republican.
What is Madison County, Illinois's political archetype?
Akashic classifies Madison 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 19 times, Republican 15 times, and other 0 times.
When did Madison County, Illinois last vote Democratic?
The most recent presidential election in which Madison County, Illinois voted Democratic was 2008.
How many people live in Madison County, Illinois?
Madison County, Illinois has a population of 264,238 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Madison County, Illinois?
Median household income in Madison County, Illinois is $75,793 — below the national median of $80,734. The Illinois state median is $83,390.
What is the political history of Madison County, Illinois?
Akashic tracks 38 presidential elections in Madison County, Illinois from 1876 to 2024. Of those, 19 went Democratic and 15 went Republican. The county's archetype — "Republican loyalist" — captures the overall trajectory of that voting record.