U.S. House seat for Texas's 18th congressional district. Representatives serve two-year terms.

13 candidates filed, 2 active for the 2026 House election in Texas District 18. Party primary on Mar 3, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Sylvester Turner D | 69.4% | 218,644 | |
| 2022 | Sheila Jackson Lee D | 70.7% | 156,268 | |
| 2020 | Sheila Jackson Lee D | 73.3% | 246,895 | |
| 2018 | Sheila Jackson Lee D | 75.2% | 184,332 | |
| 2016 | Sheila Jackson Lee D | 73.5% | 204,308 | |
| 2014 | Sheila Jackson Lee D | 71.8% | 106,010 | |
| 2012 | Sheila Jackson Lee D | 75.0% | 194,932 | |
| 2010 | Sheila Jackson Lee D | 70.2% | 121,293 | |
| 2008 | Sheila Jackson-Lee D | 77.3% | 192,198 | |
| 2006 | Sheila Jackson-Lee D | 76.6% | 86,051 | |
| 2004 | Sheila Jackson-Lee D | 88.9% | 152,988 | |
| 2002 | Sheila Jackson-Lee D | 76.9% | 128,926 | |
| 2000 | Sheila Jackson-Lee D | 76.5% | 172,378 | |
| 1998 | Sheila Jackson-Lee D | 89.9% | 91,267 | |
| 1994 | Sheila Jackson-Lee D | 73.5% | 115,390 |