Presidential elections · 2000–2024
Union County, SD — Presidential Election Results (2000–2024)
In 2024, Union County, South Dakota voted for Donald J. Trump (Republican) by R+40.7 — 2,548 Democratic to 6,160 Republican of 8,876 votes cast. From 2020 to 2024 it shifted 4.3 points toward Republicans. That makes it 11.5 points more Republican than South Dakota overall (R+29.2).
Data: MIT Election Data & Science Lab, Harvard Dataverse.
Margin by election, 2000–2024
Democratic minus Republican, in points of all votes cast — blue bars Democratic, red Republican.
Every election in Union County
| Year | Democratic | Republican | Other | Dem share | Rep share | Margin |
|---|---|---|---|---|---|---|
| 2024 | 2,548 | 6,160 | 168 | 28.7% | 69.4% | R+40.7 |
| 2020 | 2,725 | 5,944 | 186 | 30.8% | 67.1% | R+36.4 |
| 2016 | 2,227 | 5,290 | 380 | 28.2% | 67.0% | R+38.8 |
| 2012 | 2,782 | 4,698 | 116 | 36.6% | 61.8% | R+25.2 |
| 2008 | 3,244 | 4,310 | 66 | 42.6% | 56.6% | R+14.0 |
| 2004 | 3,000 | 3,987 | 61 | 42.6% | 56.6% | R+14.0 |
| 2000 | 2,358 | 3,265 | 149 | 40.9% | 56.6% | R+15.7 |
Union County presidential elections — FAQ
Who carried Union County in the 2024 presidential election?+
Donald J. Trump (Republican) carried Union County, South Dakota in 2024 by R+40.7, with 8,876 votes cast. Data: MIT Election Data & Science Lab.
How did Union County shift between 2020 and 2024?+
Union County shifted 4.3 points toward Republicans between 2020 (R+36.4) and 2024 (R+40.7).
Is Union County more Democratic or Republican than South Dakota overall?+
In 2024, Union County went R+40.7 while South Dakota overall went R+29.2 — 11.5 points more Republican than the state.
Where does this election data come from?+
County-level presidential returns (2000–2024) come from the MIT Election Data and Science Lab (MEDSL), published on the Harvard Dataverse. pumsdata is an independent product that makes the data easy to map and compare, and is not affiliated with MEDSL or Harvard.