Jefferson County, Idaho
AkashicJefferson County, IDTrumpR+73.3
2024 precinct map of Jefferson CountyPrecinct-level 2024 presidential results for Jefferson 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 | 85.2% | 13,481 |
|---|---|---|
| Kamala HarrisDemocratic | 12.0% | 1,891 |
| Robert F Kennedy Jr.Independent | 1.5% | 242 |
Harris +50Trump +50
21 precincts · 15,820 votes. Hover any precinct for its result.
The precinct map shows the 2024 presidential vote; the timeline scrubs the county’s overall result across 1916–2024.
38 presidential elections
| Year | Won | Democratic | Republican | Other | Margin | Total |
|---|---|---|---|---|---|---|
| R | 12.0%Harris1,891 | 85.2%Trump13,481 | 1.5%Kennedy242 | 15,820 | ||
| R | 11.7%Biden1,661 | 85.4%Trump12,099 | 1.8%Jorgensen252 | 14,173 | ||
| R | 8.5%Clinton976 | 73.5%Trump8,436 | 13.6%McMullin1,560 | 11,471 | ||
| R | 11.4%Obama1,303 | 86.9%Romney9,895 | 0.9%Johnson97 | 11,381 | ||
| R | 15.7%Obama1,641 | 81.8%McCain8,540 | 2.5%Nader260 | 10,441 | ||
| R | 12.2%Kerry1,084 | 86.5%Bush7,703 | 1.3%Badnarik119 | 8,906 | ||
| R | 14.0%Gore1,100 | 82.7%Bush6,480 | 0.3%Nader25 | 7,836 | ||
| R | 19.3%Clinton1,427 | 66.5%Dole4,925 | 13.4%Perot994 | 7,403 | ||
| R | 13.7%Clinton978 | 48.8%Bush3,471 | 30.4%Perot2,164 | 7,116 | ||
| R | 18.0%Dukakis1,198 | 79.6%Bush5,295 | 2.3%Paul156 | 6,649 | ||
| R | 11.3%Mondale743 | 87.9%Reagan5,770 | 0.8%Bergland50 | 6,563 | ||
| R | 12.0%Carter833 | 84.5%Reagan5,860 | 3.5%Anderson240 | 6,933 | ||
| R | 31.6%Carter1,745 | 65.1%Ford3,599 | 3.3%Maddox181 | 5,525 | ||
| R | 14.0%McGovern715 | 58.4%Nixon2,983 | 27.6%Schmitz1,412 | 5,110 | ||
| R | 20.1%Humphrey955 | 61.5%Nixon2,927 | 18.5%Wallace879 | 4,761 | ||
| R | 42.9%Johnson2,061 | 57.1%Goldwater2,740 | 0.0% | 4,801 | ||
| R | 47.5%Kennedy2,374 | 52.5%Nixon2,625 | 0.0% | 4,999 | ||
| R | 39.9%Stevenson1,823 | 60.1%Eisenhower2,748 | 0.0% | 4,571 | ||
| R | 33.2%Stevenson1,474 | 66.8%Eisenhower2,970 | 0.0%Hallinan2 | 4,446 | ||
| D | 56.5%Truman2,017 | 41.8%Dewey1,490 | 1.7%Thurmond61 | 3,568 | ||
| D | 60.0%Roosevelt2,198 | 39.8%Dewey1,458 | 0.2%Thomas9 | 3,665 | ||
| D | 60.3%Roosevelt2,631 | 39.3%Willkie1,717 | 0.4%Thomas16 | 4,364 | ||
| D | 71.8%Roosevelt2,776 | 26.8%Landon1,037 | 1.3%Lemke51 | 3,864 | ||
| D | 67.0%Roosevelt2,501 | 31.5%Hoover1,177 | 1.4%Thomas54 | 3,732 | ||
| R | 44.6%Smith1,350 | 55.2%Hoover1,671 | 0.2%Thomas7 | 3,028 | ||
| R | 11.0%Davis305 | 50.1%Coolidge1,393 | 39.0%La Follette1,084 | 2,782 | ||
| R | 29.2%Cox741 | 70.8%Harding1,794 | 0.0% | 2,535 | ||
| D | 58.9%Wilson1,606 | 36.4%Hughes993 | 4.6%Benson126 | 2,725 | ||
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presidential history
Presidential margin, 1916–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1916 | +22.5% |
| 1920 | −41.5% |
| 1924 | −39.1% |
| 1928 | −10.6% |
| 1932 | +35.5% |
| 1936 | +45.0% |
| 1940 | +20.9% |
| 1944 | +20.2% |
| 1948 | +14.8% |
| 1952 | −33.6% |
| 1956 | −20.2% |
| 1960 | −5.0% |
| 1964 | −14.1% |
| 1968 | −41.4% |
| 1972 | −44.4% |
| 1976 | −33.6% |
| 1980 | −72.5% |
| 1984 | −76.6% |
| 1988 | −61.6% |
| 1992 | −35.0% |
| 1996 | −47.3% |
| 2000 | −68.7% |
| 2004 | −74.3% |
| 2008 | −66.1% |
| 2012 | −75.5% |
| 2016 | −65.0% |
| 2020 | −73.6% |
| 2024 | −73.3% |
DemocraticRepublican
Jefferson County's 2024 presidential margin of R+73.2 ranks among the widest in the state, reflecting a predominantly rural, agricultural population with little urban counterweight to the region's strong Republican lean.
Across the recorded series it reached a Democratic high of 45.0 points in 1936 and a Republican high of 76.6 points in 1984. The 2024 margin was 73.3 points.
A population of 33,154, a 86% non-Hispanic-white share, and a median household income of $86,679 describe the county. The county's voting pattern over the last decade is most similar to that of Cassia County and Sevier County.
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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.
Jefferson County, Idaho. Akashic. https://akashic.app/county/16051/. Accessed May 20, 2026. License: CC BY 4.0.
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Frequently asked questions
How did Jefferson County, Idaho vote in 2024?
In 2024, Jefferson County, Idaho voted Republican by 73.3 points (R+73.3), carried by the Republican candidate. Out of 15,820 votes cast, 1,891 went Democratic and 13,481 went Republican.
When did Jefferson County, Idaho last vote Democratic?
The most recent presidential election in which Jefferson County, Idaho voted Democratic was 1948.
How many people live in Jefferson County, Idaho?
Jefferson County, Idaho has a population of 33,154 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Jefferson County, Idaho?
Median household income in Jefferson County, Idaho is $86,679 — above the national median of $80,734. The Idaho state median is $77,800.
What is the political history of Jefferson County, Idaho?
Akashic tracks 38 presidential elections in Jefferson County, Idaho from 1876 to 2024. Of those, 6 went Democratic and 22 went Republican.