Missouri held special elections on November 5, 2019, deciding 6 legislative seats.
Legislature
- House (163 seats): 47 D, 115 R, 1 other or vacant before the election, 48 D, 114 R, 1 other or vacant after; control stayed with Republicans.
- Senate (34 seats): 10 D, 24 R before the election, 10 D, 24 R after; control stayed with Republicans.
Legislative races
| Race | Winner | Others | Notes |
|---|---|---|---|
| House 22 | Yolanda Young (D) 81.6% | Tammy Louise Herrera (R) 11.2%, Jeff Francis (G) 7.1% | |
| House 36 | Mark Sharp (D) 74.2% | Bob Voorhees (G) 10.5% | |
| House 74 | Mike Person (D) 57.3% | Nick Kasoff (L) 42.7% | |
| House 78 | Rasheen Aldridge (D) 99.3% | Unopposed | |
| House 99 | Trish Gunby (D) 54% | Lee Ann Pitman (R) 46% | Flipped R to D |
| House 158 | Scott Cupps (R) 82.6% | Lisa Kalp (D) 17.4% |