2020Final results
2020 election for Missouri Senate District 15
Missouri State Senate · Missouri
Andrew Koenig (R) won with 54.0% of the vote, defeating Deb Lavender (D) by 8.0 points.
Andrew KoenigRepublican · winner · incumbent
54.0%61,172
Deb LavenderDemocrat
46.0%52,132
113,304 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET
The seat over time
D − R margin in this seat's races around 2020
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 10:09 AM ET