Decatur County, Iowa
AkashicDecatur County, IATrumpR+46.9
2024 precinct map of Decatur CountyPrecinct-level 2024 presidential results for Decatur 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 | 72.5% | 2,711 |
|---|---|---|
| Kamala HarrisDemocratic | 25.6% | 957 |
| Robert F Kennedy Jr.We The People | 1.1% | 42 |
Harris +50Trump +50
4 precincts · 3,739 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 | 25.6%Harris957 | 72.5%Trump2,711 | 1.1%Kennedy42 | 3,739 | ||
| R | 29.4%Biden1,120 | 68.7%Trump2,615 | 0.8%Jorgensen29 | 3,804 | ||
| R | 31.7%Clinton1,201 | 60.7%Trump2,296 | 3.3%Johnson123 | 3,784 | ||
| R | 46.7%Obama1,791 | 50.8%Romney1,947 | 0.9%Johnson33 | 3,833 | ||
| R | 48.4%Obama1,986 | 49.2%McCain2,020 | 2.3%Nader96 | 4,102 | ||
| R | 46.3%Kerry1,859 | 52.1%Bush2,088 | 1.6%Other64 | 4,011 | ||
| R | 45.1%Gore1,674 | 51.3%Bush1,903 | 2.5%Nader94 | 3,709 | ||
| D | 51.0%Clinton1,846 | 35.5%Dole1,287 | 12.5%Perot452 | 3,623 | ||
| D | 46.8%Clinton1,866 | 33.0%Bush1,316 | 19.7%Perot786 | 3,986 | ||
| D | 60.4%Dukakis2,192 | 38.8%Bush1,406 | 0.8%Larouche29 | 3,627 | ||
| R | 49.5%Mondale2,098 | 49.6%Reagan2,104 | 0.9%Larouche40 | 4,242 | ||
| R | 44.1%Carter2,048 | 47.7%Reagan2,212 | 8.2%Anderson380 | 4,640 | ||
| D | 57.3%Carter2,698 | 41.0%Ford1,932 | 1.6%McCarthy77 | 4,707 | ||
| R | 40.9%McGovern1,880 | 57.4%Nixon2,638 | 1.6%Schmitz75 | 4,593 | ||
| R | 44.8%Humphrey2,057 | 49.3%Nixon2,261 | 5.9%Wallace270 | 4,588 | ||
| D | 68.2%Johnson3,331 | 31.6%Goldwater1,542 | 0.2%Hass12 | 4,885 | ||
| R | 44.2%Kennedy2,411 | 55.7%Nixon3,039 | 0.1%Byrd7 | 5,457 | ||
| R | 49.0%Stevenson2,806 | 50.9%Eisenhower2,912 | 0.1%Andrews7 | 5,725 | ||
| R | 40.9%Stevenson2,521 | 58.7%Eisenhower3,621 | 0.4%Hallinan26 | 6,168 | ||
| D | 54.7%Truman3,172 | 43.9%Dewey2,547 | 1.4%Thurmond84 | 5,803 | ||
| D | 52.9%Roosevelt3,316 | 46.8%Dewey2,934 | 0.3%Thomas18 | 6,268 | ||
| D | 52.9%Roosevelt3,938 | 46.9%Willkie3,494 | 0.2%Thomas16 | 7,448 | ||
| D | 55.1%Roosevelt4,131 | 44.4%Landon3,327 | 0.5%Lemke36 | 7,494 | ||
| D | 61.6%Roosevelt3,591 | 36.8%Hoover2,148 | 1.6%Thomas91 | 5,830 | ||
| R | 40.1%Smith2,675 | 59.1%Hoover3,942 | 0.9%Thomas58 | 6,675 | ||
| R | 24.8%Davis1,693 | 47.1%Coolidge3,221 | 28.1%La Follette1,921 | 6,835 | ||
| R | 37.9%Cox2,592 | 61.2%Harding4,187 | 1.0%Debs66 | 6,845 | ||
| D | 51.1%Wilson2,111 | 47.4%Hughes1,962 | 1.5%Benson62 | 4,135 | ||
| D | 42.2%Wilson1,659 | 34.4%Taft1,351 | 23.4%Roosevelt918 | 3,928 | ||
| R | 44.2%Bryan1,809 | 52.5%Taft2,149 | 3.3%Debs133 | 4,091 | ||
| R | 37.2%Parker1,548 | 58.4%Roosevelt2,430 | 4.3%Debs180 | 4,158 | ||
| R | 45.3%Bryan2,058 | 53.2%McKinley2,415 | 1.5%Woolley66 | 4,539 | ||
| D | 50.5%Bryan2,362 | 48.5%McKinley2,268 | 1.1%Palmer50 | 4,680 | ||
| R | 39.3%Cleveland1,486 | 49.1%Harrison1,856 | 11.6%Weaver438 | 3,780 | ||
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presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −9.8% |
| 1896 | +2.0% |
| 1900 | −7.9% |
| 1904 | −21.2% |
| 1908 | −8.3% |
| 1912 | +7.8% |
| 1916 | +3.6% |
| 1920 | −23.3% |
| 1924 | −22.4% |
| 1928 | −19.0% |
| 1932 | +24.8% |
| 1936 | +10.7% |
| 1940 | +6.0% |
| 1944 | +6.1% |
| 1948 | +10.8% |
| 1952 | −17.8% |
| 1956 | −1.9% |
| 1960 | −11.5% |
| 1964 | +36.6% |
| 1968 | −4.4% |
| 1972 | −16.5% |
| 1976 | +16.3% |
| 1980 | −3.5% |
| 1984 | −0.1% |
| 1988 | +21.7% |
| 1992 | +13.8% |
| 1996 | +15.4% |
| 2000 | −6.2% |
| 2004 | −5.7% |
| 2008 | −0.8% |
| 2012 | −4.1% |
| 2016 | −28.9% |
| 2020 | −39.3% |
| 2024 | −46.9% |
DemocraticRepublican
voter registration
Registered voters
By party of registration, over time
DemocraticRepublicanUnaffiliatedOther parties
| Year | Total registered | Democratic | Republican | Unaffiliated | Other |
|---|---|---|---|---|---|
| 2008 | 6,018 | 2,132 | 1,864 | 2,010 | 12 |
| 2010 | 5,977 | 2,025 | 1,912 | 2,027 | 13 |
| 2012 | 5,915 | 1,935 | 1,905 | 2,062 | 13 |
| 2014 | 5,796 | 1,814 | 1,842 | 2,127 | 13 |
| 2016 | 4,908 | 1,522 | 1,848 | 1,517 | 21 |
| 2018 | 4,941 | 1,465 | 1,869 | 1,569 | 38 |
| 2020 | 5,155 | 1,486 | 2,120 | 1,508 | 41 |
| 2022 | 4,955 | 1,271 | 2,167 | 1,479 | 38 |
| 2024 | 4,920 | 1,100 | 2,379 | 1,396 | 45 |
Source: Iowa Secretary of State
Decatur County's small population and agricultural economy mirror the broader rural Iowa shift toward wide Republican margins — the 2024 gap of nearly 47 points reflects a voting pattern that has grown steadily since 2000.
Across the recorded series it reached a Democratic high of 36.6 points in 1964 and a Republican high of 46.9 points in 2024. Between 2020 and 2024 the county moved 7.6 points toward the Republican candidate; the 2024 margin was 46.9 points.
A population of 7,759, a 90% non-Hispanic-white share, and a median household income of $59,044 describe the county. The county's voting pattern over the last decade is most similar to that of Monroe County and Greene County.
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All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Decatur County, Iowa. Akashic. https://akashic.app/county/19053/. Accessed May 20, 2026. License: CC BY 4.0.
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Frequently asked questions
How did Decatur County, Iowa vote in 2024?
In 2024, Decatur County, Iowa voted Republican by 46.9 points (R+46.9), carried by the Republican candidate. Out of 3,739 votes cast, 957 went Democratic and 2,711 went Republican.
When did Decatur County, Iowa last vote Democratic?
The most recent presidential election in which Decatur County, Iowa voted Democratic was 1996.
How many people live in Decatur County, Iowa?
Decatur County, Iowa has a population of 7,759 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Decatur County, Iowa?
Median household income in Decatur County, Iowa is $59,044 — below the national median of $80,734. The Iowa state median is $75,059.
What is the political history of Decatur County, Iowa?
Akashic tracks 38 presidential elections in Decatur County, Iowa from 1876 to 2024. Of those, 13 went Democratic and 21 went Republican.