Presidential elections · 2000–2024
Madison County, IA — Presidential Election Results (2000–2024)
In 2024, Madison County, Iowa voted for Donald J. Trump (Republican) by R+38.5 — 3,008 Democratic to 6,864 Republican of 10,028 votes cast. From 2020 to 2024 it shifted 4.0 points toward Republicans. That makes it 25.3 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 Madison County
| Year | Democratic | Republican | Other | Dem share | Rep share | Margin |
|---|---|---|---|---|---|---|
| 2024 | 3,008 | 6,864 | 156 | 30.0% | 68.4% | R+38.5 |
| 2020 | 3,134 | 6,525 | 165 | 31.9% | 66.4% | R+34.5 |
| 2016 | 2,678 | 5,360 | 598 | 31.0% | 62.1% | R+31.1 |
| 2012 | 3,630 | 4,638 | 190 | 42.9% | 54.8% | R+11.9 |
| 2008 | 3,733 | 4,579 | 168 | 44.0% | 54.0% | R+10.0 |
| 2004 | 3,380 | 4,538 | 86 | 42.2% | 56.7% | R+14.5 |
| 2000 | 3,093 | 3,662 | 214 | 44.4% | 52.5% | R+8.2 |
Madison County presidential elections — FAQ
Who carried Madison County in the 2024 presidential election?+
Donald J. Trump (Republican) carried Madison County, Iowa in 2024 by R+38.5, with 10,028 votes cast. Data: MIT Election Data & Science Lab.
How did Madison County shift between 2020 and 2024?+
Madison County shifted 4.0 points toward Republicans between 2020 (R+34.5) and 2024 (R+38.5).
Is Madison County more Democratic or Republican than Iowa overall?+
In 2024, Madison County went R+38.5 while Iowa overall went R+13.2 — 25.3 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.