Union County, South Dakota
AkashicUnion County, SDTrumpR+40.7
2024 precinct map of Union CountyPrecinct-level 2024 presidential results for Union 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 | 69.4% | 6,160 |
|---|---|---|
| Kamala HarrisDemocratic | 28.7% | 2,548 |
| Robert F KennedyIndependent | 1.3% | 112 |
Harris +50Trump +50
12 precincts · 8,876 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 | 28.7%Harris2,548 | 69.4%Trump6,160 | 1.3%Kennedy112 | 8,876 | ||
| R | 30.8%Biden2,725 | 67.1%Trump5,944 | 2.1%Jorgensen186 | 8,855 | ||
| R | 28.2%Clinton2,227 | 67.0%Trump5,290 | 4.0%Johnson312 | 7,897 | ||
| R | 36.6%Obama2,782 | 61.8%Romney4,698 | 1.5%Johnson116 | 7,596 | ||
| R | 42.1%Obama3,244 | 56.0%McCain4,310 | 1.9%Nader147 | 7,701 | ||
| R | 42.6%Kerry3,000 | 56.6%Bush3,987 | 0.9%Nader61 | 7,048 | ||
| R | 40.9%Gore2,358 | 56.6%Bush3,265 | 2.6% | 5,772 | ||
| D | 45.7%Clinton2,378 | 42.9%Dole2,234 | 10.7%Perot555 | 5,207 | ||
| D | 43.4%Clinton2,210 | 35.0%Bush1,784 | 21.3%Perot1,085 | 5,097 | ||
| D | 57.4%Dukakis2,612 | 41.9%Bush1,907 | 0.7%Paul31 | 4,550 | ||
| R | 47.5%Mondale2,221 | 52.0%Reagan2,431 | 0.5%Serrette25 | 4,677 | ||
| R | 36.2%Carter1,830 | 55.2%Reagan2,788 | 8.6%Anderson436 | 5,054 | ||
| D | 52.3%Carter2,540 | 47.3%Ford2,297 | 0.5%Macbride23 | 4,860 | ||
| D | 52.7%McGovern2,554 | 46.9%Nixon2,271 | 0.4%Schmitz17 | 4,842 | ||
| R | 45.2%Humphrey2,014 | 49.7%Nixon2,212 | 5.1%Wallace225 | 4,451 | ||
| D | 62.1%Johnson2,828 | 37.9%Goldwater1,727 | 0.0% | 4,555 | ||
| R | 46.4%Kennedy2,331 | 53.6%Nixon2,688 | 0.0% | 5,019 | ||
| R | 47.1%Stevenson2,343 | 52.9%Eisenhower2,636 | 0.0% | 4,979 | ||
| R | 32.7%Stevenson1,645 | 67.3%Eisenhower3,393 | 0.0% | 5,038 | ||
| D | 50.1%Truman2,237 | 49.4%Dewey2,205 | 0.5%Thurmond23 | 4,465 | ||
| R | 45.1%Roosevelt2,057 | 54.9%Dewey2,501 | 0.0% | 4,558 | ||
| R | 45.6%Roosevelt2,608 | 54.4%Willkie3,116 | 0.0% | 5,724 | ||
| D | 60.8%Roosevelt3,520 | 31.9%Landon1,845 | 7.3%Lemke420 | 5,785 | ||
| D | 71.2%Roosevelt3,530 | 27.9%Hoover1,381 | 0.9%Thomas46 | 4,957 | ||
| R | 46.4%Smith2,106 | 53.2%Hoover2,415 | 0.4%Thomas19 | 4,540 | ||
| R | 23.7%Davis877 | 45.0%Coolidge1,665 | 31.2%La Follette1,155 | 3,697 | ||
| R | 28.7%Cox841 | 66.2%Harding1,942 | 5.2%Debs152 | 2,935 | ||
| D | 53.3%Wilson1,313 | 44.9%Hughes1,108 | 1.8%Benson44 | 2,465 | ||
| O | 39.1%Wilson965 | 0.0%Taft0 | 60.9%Roosevelt1,504 | 2,469 | ||
| R | 41.0%Bryan1,009 | 56.6%Taft1,392 | 2.3%Debs57 | 2,458 | ||
| R | 27.5%Parker730 | 68.3%Roosevelt1,813 | 4.2%Debs111 | 2,654 | ||
| R | 45.8%Bryan1,358 | 53.0%McKinley1,571 | 1.2%Woolley35 | 2,964 | ||
| D | 53.2%Bryan1,491 | 46.2%McKinley1,297 | 0.6%Palmer17 | 2,805 | ||
| O | 12.1%Cleveland241 | 43.3%Harrison860 | 44.6%Weaver885 | 1,986 | ||
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presidential history
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1892 | −31.2% |
| 1896 | +6.9% |
| 1900 | −7.2% |
| 1904 | −40.8% |
| 1908 | −15.6% |
| 1912 | +39.1% |
| 1916 | +8.3% |
| 1920 | −37.5% |
| 1924 | −21.3% |
| 1928 | −6.8% |
| 1932 | +43.4% |
| 1936 | +29.0% |
| 1940 | −8.9% |
| 1944 | −9.7% |
| 1948 | +0.7% |
| 1952 | −34.7% |
| 1956 | −5.9% |
| 1960 | −7.1% |
| 1964 | +24.2% |
| 1968 | −4.4% |
| 1972 | +5.8% |
| 1976 | +5.0% |
| 1980 | −19.0% |
| 1984 | −4.5% |
| 1988 | +15.5% |
| 1992 | +8.4% |
| 1996 | +2.8% |
| 2000 | −15.7% |
| 2004 | −14.0% |
| 2008 | −13.8% |
| 2012 | −25.2% |
| 2016 | −38.8% |
| 2020 | −36.4% |
| 2024 | −40.7% |
DemocraticRepublican
Union County sits at South Dakota's southeastern tip where the Big Sioux meets the Missouri, with Elk Point as its seat. Despite proximity to Sioux City's metro influence, it has returned Republican presidential margins above 35 points in recent cycles.
Across the recorded series it reached a Democratic high of 43.4 points in 1932 and a Republican high of 40.8 points in 1904. Between 2020 and 2024 the county moved 4.3 points toward the Republican candidate; the 2024 margin was 40.7 points.
A population of 17,081, a 88% non-Hispanic-white share, and a median household income of $89,636 describe the county. The county's voting pattern over the last decade is most similar to that of Milam County and Armstrong County.
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All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
Union County, South Dakota. Akashic. https://akashic.app/county/46127/. Accessed May 20, 2026. License: CC BY 4.0.
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Frequently asked questions
How did Union County, South Dakota vote in 2024?
In 2024, Union County, South Dakota voted Republican by 40.7 points (R+40.7), carried by the Republican candidate. Out of 8,876 votes cast, 2,548 went Democratic and 6,160 went Republican.
When did Union County, South Dakota last vote Democratic?
The most recent presidential election in which Union County, South Dakota voted Democratic was 1996.
How many people live in Union County, South Dakota?
Union County, South Dakota has a population of 17,081 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in Union County, South Dakota?
Median household income in Union County, South Dakota is $89,636 — above the national median of $80,734. The South Dakota state median is $75,081.
What is the political history of Union County, South Dakota?
Akashic tracks 38 presidential elections in Union County, South Dakota from 1876 to 2024. Of those, 11 went Democratic and 21 went Republican.