U.S. House seat for Iowa's 4th congressional district. Representatives serve two-year terms.

11 candidates filed, 2 active for the 2026 House election in Iowa District 4. Party primary on Jun 2, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Randy Feenstra R | 67.2% | 372,697 | |
| 2022 | Randy Feenstra R | 67.4% | 276,732 | |
| 2020 | Randy Feenstra R | 62.1% | 382,130 | |
| 2018 | Steve King R | 50.4% | 313,045 | |
| 2016 | Steve King R | 61.3% | 369,712 | |
| 2014 | Steve King R | 61.7% | 275,338 | |
| 2012 | Steve King R | 53.0% | 377,657 | |
| 2010 | Tom Latham R | 65.7% | 232,387 | |
| 2008 | Tom Latham R | 60.6% | 306,204 | |
| 2006 | Tom Latham R | 57.2% | 212,632 | |
| 2004 | Tom Latham R | 61.0% | 297,415 | |
| 2002 | Tom Latham R | 54.8% | 210,710 | |
| 2000 | Greg Ganske R | 61.4% | 275,543 | |
| 1998 | Greg Ganske R | 65.2% | 199,277 | |
| 1996 | Greg Ganske R | 52.1% | 256,264 |