Leadership
- President Pro Tem - Robert N. Mayer
- Majority Floor Leader - Tom Dempsey
- Assistant Majority Floor Leader - Jack Goodman
- Majority Caucus Chairman - Bill Stouffer
- Majority Caucus Secretary - Eric Schmitt
- Majority Caucus Whip - Mike Parson
- Minority Floor Leader - Victor Callahan
- Assistant Minority Floor Leader - Jolie Justus
- Minority Caucus Chairman - Timothy P. Green
- Minority Caucus Secretary - Robin Wright-Jones