Missouri held special elections on November 3, 2015, deciding 3 legislative seats.
Legislature
- House (163 seats): 45 D, 117 R, 1 other or vacant before the election, 45 D, 117 R, 1 other or vacant after; control stayed with Republicans.
- Senate (34 seats): 9 D, 25 R before the election, 9 D, 25 R after; control stayed with Republicans.
Legislative races
| Race | Winner | Others | Notes |
|---|---|---|---|
| House 29 | Rory Rowland (D) 58.3% | Brian DeMoss (R) 36.4%, Richard McKie (Constitution Party) 5.3% | Flipped R to D |
| House 36 | Daron McGee (D) 56.8% | Nola Wood (R) 25.5%, Mary Ann Drape (I) 17% | |
| House 89 | Dean Plocher (R) 60.2% | Al Gerber (D) 39.8% |