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

3 candidates filed, 2 active for the 2026 House election in Texas District 13. Party primary on Mar 3, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Ronny Jackson R | 100.0% | 240,622 | |
| 2022 | Ronny Jackson R | 75.4% | 214,677 | |
| 2020 | Ronny Jackson R | 79.4% | 273,508 | |
| 2018 | Mac Thornberry R | 81.5% | 207,285 | |
| 2016 | Mac Thornberry R | 90.0% | 221,242 | |
| 2014 | Mac Thornberry R | 84.3% | 131,451 | |
| 2012 | Mac Thornberry R | 91.0% | 206,388 | |
| 2010 | Mac Thornberry R | 87.0% | 130,043 | |
| 2008 | Mac Thornberry R | 77.6% | 231,919 | |
| 2006 | Mac Thornberry R | 74.4% | 145,396 | |
| 2004 | Mac Thornberry R | 92.3% | 205,241 | |
| 2002 | Mac Thornberry R | 79.3% | 150,619 | |
| 2000 | Mac Thornberry R | 67.6% | 174,475 | |
| 1998 | William M \"Mac\" Thornberry R | 67.9% | 119,466 | |
| 1996 | William M \"Mac\" Thornberry R | 66.9% | 173,627 |