U.S. House seat for Illinois's 8th congressional district. Representatives serve two-year terms.

14 candidates filed, 2 active for the 2026 House election in Illinois District 8. Party primary on Mar 17, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Raja Krishnamoorthi D | 57.1% | 303,073 | |
| 2022 | Raja Krishnamoorthi D | 56.9% | 207,215 | |
| 2020 | Raja Krishnamoorthi D | 73.2% | 254,578 | |
| 2018 | Raja Krishnamoorthi D | 66.0% | 197,127 | |
| 2016 | Raja Krishnamoorthi D | 58.3% | 248,571 | |
| 2014 | Tammy Duckworth D | 55.7% | 151,056 | |
| 2012 | Tammy Duckworth D | 54.7% | 225,066 | |
| 2010 | Joe Walsh R | 48.5% | 202,435 | |
| 2008 | Melissa L Bean D | 60.7% | 295,525 | |
| 2006 | Melissa L Bean D | 53.6% | 174,075 | |
| 2004 | Melissa Bean D | 51.7% | 270,393 | |
| 2002 | Philip M Crane R | 57.4% | 165,901 | |
| 2000 | Philip M Crane R | 61.0% | 232,695 | |
| 1998 | Philip M Crane R | 68.6% | 151,856 | |
| 1996 | Philip M Crane R | 62.2% | 205,305 |