U.S. House seat for Illinois's 13th congressional district. Representatives serve two-year terms.

5 candidates filed, 2 active for the 2026 House election in Illinois District 13. Party primary on Mar 17, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Nikki Budzinski D | 58.1% | 329,256 | |
| 2022 | Nikki Budzinski D | 56.6% | 250,434 | |
| 2020 | Rodney Davis R | 54.5% | 333,021 | |
| 2018 | Rodney Davis R | 50.4% | 270,974 | |
| 2016 | Rodney Davis R | 59.7% | 314,394 | |
| 2014 | Rodney Davis R | 58.7% | 210,272 | |
| 2012 | Rodney Davis R | 46.5% | 294,385 | |
| 2010 | Judy Biggert R | 63.8% | 238,413 | |
| 2008 | Judy Biggert R | 53.6% | 337,720 | |
| 2006 | Judy Biggert R | 58.3% | 205,227 | |
| 2004 | Judy Biggert R | 65.0% | 308,308 | |
| 2002 | Judy Biggert R | 70.3% | 198,615 | |
| 2000 | Judy Biggert R | 66.2% | 292,018 | |
| 1998 | Judy Biggert R | 61.0% | 199,767 | |
| 1996 | Harris W Fawell R | 59.9% | 236,344 |