Jefferson County, Iowa
AkashicJefferson County, IATrumpR+6.8
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 | 52.2% | 4,353 |
|---|---|---|
| Kamala HarrisDemocratic | 45.4% | 3,788 |
| Robert F Kennedy Jr.We The People | 1.3% | 106 |
Harris +50Trump +50
12 precincts · 8,346 votes. Hover any precinct for its result.
The precinct map shows the 2024 presidential vote; the timeline scrubs the county’s overall result across 1892–2024.
38 presidential elections
| Year | Won | Democratic | Republican | Other | Margin | Total |
|---|---|---|---|---|---|---|
| R | 45.4%Harris3,788 | 52.2%Trump4,353 | 1.3%Kennedy106 | 8,346 | ||
| R | 48.2%Biden4,319 | 49.6%Trump4,443 | 1.1%Jorgensen95 | 8,959 | ||
| R | 44.8%Clinton3,710 | 45.2%Trump3,748 | 3.1%Stein256 | 8,285 | ||
| D | 56.2%Obama4,798 | 40.3%Romney3,436 | 1.5%Johnson126 | 8,530 | ||
| D | 58.7%Obama5,070 | 38.5%McCain3,324 | 2.7%Nader237 | 8,631 | ||
| D | 54.2%Kerry4,490 | 44.1%Bush3,648 | 1.7%Other143 | 8,281 | ||
| R | 37.9%Gore2,863 | 43.0%Bush3,248 | 2.7%Nader206 | 7,548 | ||
| D | 35.1%Clinton2,597 | 34.4%Dole2,541 | 7.7%Perot571 | 7,397 | ||
| D | 30.7%Clinton2,562 | 30.5%Bush2,541 | 14.9%Perot1,241 | 8,341 | ||
| R | 49.3%Dukakis3,594 | 49.5%Bush3,614 | 1.2%Larouche88 | 7,296 | ||
| R | 38.3%Mondale2,961 | 61.2%Reagan4,727 | 0.5%Larouche37 | 7,725 | ||
| R | 35.3%Carter2,577 | 56.2%Reagan4,099 | 8.5%Anderson623 | 7,299 | ||
| R | 46.6%Carter3,377 | 51.7%Ford3,746 | 1.7%McCarthy121 | 7,244 | ||
| R | 33.1%McGovern2,362 | 64.8%Nixon4,628 | 2.1%Schmitz149 | 7,139 | ||
| R | 34.7%Humphrey2,411 | 59.5%Nixon4,130 | 5.7%Wallace398 | 6,939 | ||
| D | 59.8%Johnson4,135 | 39.8%Goldwater2,755 | 0.4%Hass26 | 6,916 | ||
| R | 36.0%Kennedy2,780 | 64.0%Nixon4,942 | 0.0% | 7,722 | ||
| R | 37.1%Stevenson2,845 | 62.8%Eisenhower4,807 | 0.1%Andrews7 | 7,659 | ||
| R | 30.3%Stevenson2,470 | 69.1%Eisenhower5,630 | 0.6%Hallinan49 | 8,149 | ||
| R | 42.8%Truman3,033 | 55.1%Dewey3,906 | 2.1%Thurmond149 | 7,088 | ||
| R | 39.8%Roosevelt2,926 | 59.0%Dewey4,335 | 1.1%Thomas83 | 7,344 | ||
| R | 40.8%Roosevelt3,402 | 58.7%Willkie4,891 | 0.5%Thomas43 | 8,336 | ||
| R | 46.5%Roosevelt3,690 | 50.8%Landon4,037 | 2.7%Lemke214 | 7,941 | ||
| D | 57.0%Roosevelt4,056 | 41.6%Hoover2,955 | 1.4%Thomas99 | 7,110 | ||
| R | 30.3%Smith2,159 | 69.0%Hoover4,919 | 0.6%Thomas46 | 7,124 | ||
| R | 18.9%Davis1,249 | 61.6%Coolidge4,062 | 19.4%La Follette1,282 | 6,593 | ||
| R | 23.7%Cox1,450 | 74.6%Harding4,558 | 1.6%Debs100 | 6,108 | ||
| R | 43.7%Wilson1,734 | 54.6%Hughes2,167 | 1.7%Benson67 | 3,968 | ||
| R | 35.8%Wilson1,311 | 37.6%Taft1,378 | 26.6%Roosevelt973 | 3,662 | ||
| R | 36.9%Bryan1,439 | 58.3%Taft2,271 | 4.8%Debs186 | 3,896 | ||
| R | 31.3%Parker1,172 | 62.2%Roosevelt2,330 | 6.5%Debs242 | 3,744 | ||
| R | 38.1%Bryan1,612 | 58.7%McKinley2,482 | 3.1%Woolley132 | 4,226 | ||
| R | 40.9%Bryan1,772 | 57.2%McKinley2,478 | 1.8%Palmer79 | 4,329 | ||
| R | 39.7%Cleveland1,545 | 55.0%Harrison2,140 | 5.2%Weaver204 | 3,889 | ||
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presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −15.3% |
| 1896 | −16.3% |
| 1900 | −20.6% |
| 1904 | −30.9% |
| 1908 | −21.4% |
| 1912 | −1.8% |
| 1916 | −10.9% |
| 1920 | −50.9% |
| 1924 | −42.7% |
| 1928 | −38.7% |
| 1932 | +15.5% |
| 1936 | −4.4% |
| 1940 | −17.9% |
| 1944 | −19.2% |
| 1948 | −12.3% |
| 1952 | −38.8% |
| 1956 | −25.6% |
| 1960 | −28.0% |
| 1964 | +20.0% |
| 1968 | −24.8% |
| 1972 | −31.7% |
| 1976 | −5.1% |
| 1980 | −20.9% |
| 1984 | −22.9% |
| 1988 | −0.3% |
| 1992 | +0.3% |
| 1996 | +0.8% |
| 2000 | −5.1% |
| 2004 | +10.2% |
| 2008 | +20.2% |
| 2012 | +16.0% |
| 2016 | −0.5% |
| 2020 | −1.4% |
| 2024 | −6.8% |
DemocraticRepublican
voter registration
Registered voters
By party of registration, over time
DemocraticRepublicanUnaffiliatedOther parties
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 13,169 | 4,326 | 3,837 | 4,991 | 15 |
| 2010 | 13,188 | 4,047 | 4,137 | 4,969 | 35 |
| 2012 | 12,906 | 4,050 | 4,092 | 4,711 | 53 |
| 2014 | 11,729 | 3,847 | 3,719 | 4,086 | 77 |
| 2016 | 11,393 | 4,286 | 3,555 | 3,453 | 99 |
| 2018 | 11,299 | 4,522 | 3,361 | 3,296 | 120 |
| 2020 | 11,755 | 4,850 | 3,698 | 3,095 | 112 |
| 2022 | 11,545 | 4,502 | 3,823 | 3,111 | 109 |
| 2024 | 11,427 | 4,085 | 3,866 | 3,352 | 124 |
Source: Iowa Secretary of State
Jefferson County, home to Fairfield and the Maharishi University of Management, blends a small but visible meditation-community enclave with a broader rural population that has shifted Republican by double digits over the past two presidential cycles.
Across the recorded series it reached a Democratic high of 20.2 points in 2008 and a Republican high of 50.9 points in 1920. Between 2020 and 2024 the county moved 5.4 points toward the Republican candidate; the 2024 margin was 6.8 points.
A population of 15,705, a 82% non-Hispanic-white share, and a median household income of $61,620 describe the county. The county's voting pattern over the last decade is most similar to that of Corson County and Mahnomen County.
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Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Jefferson County, Iowa. Akashic. https://akashic.app/county/19101/. Accessed May 20, 2026. License: CC BY 4.0.
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Cities & towns in Jefferson County
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Frequently asked questions
How did Jefferson County, Iowa vote in 2024?
In 2024, Jefferson County, Iowa voted Republican by 6.8 points (R+6.8), carried by the Republican candidate. Out of 8,346 votes cast, 3,788 went Democratic and 4,353 went Republican.
When did Jefferson County, Iowa last vote Democratic?
The most recent presidential election in which Jefferson County, Iowa voted Democratic was 2012.
How many people live in Jefferson County, Iowa?
Jefferson County, Iowa has a population of 15,705 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Jefferson County, Iowa?
Median household income in Jefferson County, Iowa is $61,620 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Jefferson County, Iowa?
Akashic tracks 38 presidential elections in Jefferson County, Iowa from 1876 to 2024. Of those, 7 went Democratic and 27 went Republican.