U.S. House seat for Iowa's 1st congressional district. Representatives serve two-year terms.

8 candidates filed, 3 active for the 2026 House election in Iowa District 1. Party primary on Jun 2, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Mariannette Miller-Meeks R | 50.1% | 413,111 | |
| 2022 | Mariannette Miller-Meeks R | 53.4% | 305,120 | |
| 2020 | Ashley Hinson R | 51.3% | 413,435 | |
| 2018 | Abby Finkenauer D | 51.0% | 334,069 | |
| 2016 | Rod Blum R | 53.8% | 384,306 | |
| 2014 | Rod Blum R | 51.1% | 288,907 | |
| 2012 | Bruce L Braley D | 56.9% | 390,590 | |
| 2010 | Bruce L Braley D | 49.5% | 210,826 | |
| 2008 | Bruce L Braley D | 64.6% | 289,430 | |
| 2006 | Bruce Braley D | 55.1% | 207,478 | |
| 2004 | Jim Nussle R | 55.2% | 289,966 | |
| 2002 | Jim Nussle R | 57.3% | 196,059 | |
| 2000 | James A Leach R | 61.8% | 266,819 | |
| 1998 | James A Leach R | 56.6% | 188,132 | |
| 1996 | James A Leach R | 52.9% | 244,508 |