Presidential elections · 2000–2024
Decatur County, IA — Presidential Election Results (2000–2024)
In 2024, Decatur County, Iowa voted for Donald J. Trump (Republican) by R+46.9 — 957 Democratic to 2,711 Republican of 3,739 votes cast. From 2020 to 2024 it shifted 7.5 points toward Republicans. That makes it 33.7 points more Republican than Iowa overall (R+13.2).
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 Decatur County
| Year | Democratic | Republican | Other | Dem share | Rep share | Margin |
|---|---|---|---|---|---|---|
| 2024 | 957 | 2,711 | 71 | 25.6% | 72.5% | R+46.9 |
| 2020 | 1,120 | 2,618 | 66 | 29.4% | 68.8% | R+39.4 |
| 2016 | 1,201 | 2,296 | 237 | 32.2% | 61.5% | R+29.3 |
| 2012 | 1,791 | 1,947 | 95 | 46.7% | 50.8% | R+4.1 |
| 2008 | 1,986 | 2,020 | 96 | 48.4% | 49.2% | R+0.8 |
| 2004 | 1,859 | 2,088 | 64 | 46.3% | 52.1% | R+5.7 |
| 2000 | 1,674 | 1,903 | 132 | 45.1% | 51.3% | R+6.2 |
Decatur County presidential elections — FAQ
Who carried Decatur County in the 2024 presidential election?+
Donald J. Trump (Republican) carried Decatur County, Iowa in 2024 by R+46.9, with 3,739 votes cast. Data: MIT Election Data & Science Lab.
How did Decatur County shift between 2020 and 2024?+
Decatur County shifted 7.5 points toward Republicans between 2020 (R+39.4) and 2024 (R+46.9).
Is Decatur County more Democratic or Republican than Iowa overall?+
In 2024, Decatur County went R+46.9 while Iowa overall went R+13.2 — 33.7 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.