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

8 candidates filed, 3 active for the 2026 House election in Missouri District 8. Party primary on Aug 4, 2026. General election on Nov 3, 2026.
| Year | Winner | Result | Runner-Up | Total Votes |
|---|---|---|---|---|
| 2024 | Jason Smith R | 76.2% | 356,064 | |
| 2022 | Jason Smith R | 76.0% | 245,395 | |
| 2020 | Jason Smith R | 76.9% | 330,226 | |
| 2018 | Jason Smith R | 73.4% | 264,399 | |
| 2016 | Jason Smith R | 74.4% | 308,871 | |
| 2014 | Jason T Smith R | 66.7% | 159,224 | |
| 2012 | Jo Ann Emerson R | 71.9% | 300,391 | |
| 2010 | Jo Ann Emerson R | 65.6% | 195,999 | |
| 2008 | Jo Ann Emerson R | 71.4% | 278,288 | |
| 2006 | Jo Ann Emerson R | 71.6% | 217,989 | |
| 2004 | Jo Ann Emerson R | 72.2% | 268,711 | |
| 2002 | Jo Ann Emerson R | 71.8% | 188,321 | |
| 2000 | Jo Ann Emerson R | 69.3% | 234,066 | |
| 1998 | Jo Anna Emerson R | 62.6% | 166,524 | |
| 1996 | Jo Ann Emerson I | 50.5% | 222,854 |