2018Final results
2018 election for Missouri Senate District 18
Missouri State Senate · Missouri
Cindy O'Laughlin (R) won with 70.3% of the vote, defeating Crystal Stephens (D) by 40.6 points.
Cindy O'LaughlinRepublican · winner
70.3%46,263
Crystal StephensDemocrat
29.7%19,555
65,818 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET