2018Final results
2018 election for Oklahoma House District 9
Oklahoma House of Representatives · Oklahoma
Mark Lepak (R) won with 68.7% of the vote, defeating Clay Layton (D) by 37.5 points.
Mark LepakRepublican · winner · incumbent
68.7%9,547
Clay LaytonDemocrat
31.3%4,344
13,891 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