Madison County, Idaho: Sunbelt Conservative county. In 2024, voted R+64%. Republican peak: R+88 in 2012.
Key facts
- 2024 presidential margin
- R+64MIT Election Lab
- Political typology
- Sunbelt ConservativeAkashic typology
- Population
- 54,6182024 5-year
- Median household income
- $60,1602024 5-year
- White (non-Hispanic)
- 87.1%2024 5-year
- Black
- 1.0%2024 5-year
- Hispanic / Latino
- 9.8%2024 5-year
- Peak Democratic margin
- D+37 in 1936MIT Election Lab
- Peak Republican margin
- R+88 in 2012MIT Election Lab
- Most similar
- Iron County, UT · similarity 1.00
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.
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 | No data |
| 1896 | No data |
| 1900 | No data |
| 1904 | No data |
| 1908 | No data |
| 1912 | No data |
| 1916 | +9.5% |
| 1920 | −31.6% |
| 1924 | −31.0% |
| 1928 | −15.2% |
| 1932 | +24.7% |
| 1936 | +37.3% |
| 1940 | +15.2% |
| 1944 | +11.6% |
| 1948 | +11.6% |
| 1952 | −34.3% |
| 1956 | −28.1% |
| 1960 | −17.2% |
| 1964 | −3.8% |
| 1968 | −47.1% |
| 1972 | −55.5% |
| 1976 | −49.6% |
| 1980 | −78.6% |
| 1984 | −86.3% |
| 1988 | −71.0% |
| 1992 | −49.6% |
| 1996 | −58.1% |
| 2000 | −79.4% |
| 2004 | −84.8% |
| 2008 | −72.8% |
| 2012 | −87.5% |
| 2016 | −49.3% |
| 2020 | −63.7% |
| 2024 | −64.3% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 2,767 | 13,925 | 17,358 | ||
| R | 2,666 | 13,559 | 17,112 | ||
| R | 1,201 | 8,941 | 15,687 | ||
| R | 832 | 13,445 | 14,412 | ||
| R | 1,627 | 11,131 | 13,057 | ||
| R | 826 | 10,693 | 11,637 | ||
| R | 816 | 7,941 | 8,970 | ||
| R | 1,216 | 5,706 | 7,728 | ||
| R | 741 | 4,591 | 7,763 | ||
| R | 1,009 | 6,197 | 7,302 | ||
| R | 483 | 6,798 | 7,319 | ||
| R | 728 | 6,555 | 7,414 | ||
| R | 1,320 | 4,190 | 5,789 | ||
| R | 710 | 3,606 | 5,216 | ||
| R | 904 | 2,971 | 4,388 | ||
| R | 1,949 | 2,101 | 4,050 | ||
| R | 1,678 | 2,374 | 4,052 | ||
| R | 1,423 | 2,538 | 3,961 | ||
| R | 1,348 | 2,756 | 4,106 | ||
| D | 2,024 | 1,602 | 3,647 | ||
| D | 1,927 | 1,527 | 3,458 | ||
| D | 2,218 | 1,632 | 3,851 | ||
| D | 2,455 | 1,114 | 3,592 | ||
| D | 2,112 | 1,272 | 3,407 | ||
| R | 1,228 | 1,670 | 2,900 | ||
| R | 601 | 1,417 | 2,633 | ||
| R | 979 | 1,883 | 2,862 | ||
| D | 1,371 | 1,132 | 2,524 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
English
33.9%
German
13.2%
American
6.5%
Scottish
5.1%
Irish
4.3%
Italian
2.5%
French
2.0%
African American
0.8%
Multiple ancestry combinations reported; no single grouping above 1%.
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: 21.4 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
$60,160
Madison County ranks near the middle of US counties.
Madison County$60,160
Idaho$77,800
United States$80,734
Madison 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
24.5%
Children face moderate poverty.
Children under 1815.9%
Working age (18–64)27.9%
Seniors (65+)11.8%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
90.2%
speak English only
Spanish6.2%
Asian & Pacific Islander1.7%
Other Indo-European1.6%
Other languages0.3%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 46.5% of residents not counted as adherents by any reporting body.
Madison County's dominant Latter-day Saint population and university town of Rexburg produce presidential margins that routinely rank among the highest in Idaho, with the 2024 result of R+64.8 reflecting deep, consistent partisan alignment.
The Republican margin here reached eighty-eight points in 2012. Between 2020 and 2024 the county moved one point toward the Republican candidate; the 2024 margin was sixty-four points.
A median household income of $60,160, a 87% non-Hispanic-white share, and a population of 54,618 describe the county. The county's voting pattern over the last decade is most similar to that of Iron County and Garfield 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.
Madison County, Idaho. Akashic. https://akashic.app/county/16065/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More sunbelt conservative counties
Frequently asked questions
How did Madison County, Idaho vote in 2024?
In 2024, Madison County, Idaho voted Republican by 64.3 points (R+64), carried by the Republican candidate. Out of 17,358 votes cast, 2,767 went Democratic and 13,925 went Republican.
What is Madison County, Idaho's political typology?
Akashic places Madison County, Idaho in the "Sunbelt Conservative" typology — Affluent, predominantly white Sunbelt counties — reliably Republican. 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 6 times, Republican 22 times, and other 0 times.
When did Madison County, Idaho last vote Democratic?
The most recent presidential election in which Madison County, Idaho voted Democratic was 1948.
How many people live in Madison County, Idaho?
Madison County, Idaho has a population of 54,618 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Madison County, Idaho?
Median household income in Madison County, Idaho is $60,160 — below the national median of $80,734. The Idaho state median is $77,800.
What is the political history of Madison County, Idaho?
Akashic tracks 38 presidential elections in Madison County, Idaho from 1876 to 2024. Of those, 6 went Democratic and 22 went Republican. The county's typology — "Sunbelt Conservative" — captures where that record, its demographics, and its recent swing place it among American communities.