The statewide primary runoff for Oklahoma was held on August 27, 2020. Candidates competed to advance to the general election scheduled for November 3. A primary was held on June 30. In races where no candidate received a majority of the vote (50% plus one vote), the top two vote-getters advanced to the primary runoff.
Eight seats in the state legislature were on the primary runoff ballot; five in the Oklahoma State Senate and three in the Oklahoma House of Representatives. All eight races were Republican primary runoffs.
A total of 24 out of 48 seats in the Oklahoma State Senate are up for election in 2020. Fourteen contested partisan races were on the primary ballot. Districts 5, 7, 17, 35, and 43 advanced to the primary runoff, roughly 36% of contested state Senate primary races. Three of the five state Senate primary runoffs featured incumbents, all of whom were defeated. The remaining two primary runoffs were for open seats.
All 101 seats in the Oklahoma House of Representatives are up for election in 2020. Thirty-nine contested partisan races were on the primary ballot. Districts 71, 79, and 96 advanced to the primary runoff, roughly 8% of contested state House primary races. No state House primary runoffs featured incumbents in either the primary or the primary runoff.
Oklahoma has a Republican state government trifecta. A trifecta exists when one political party simultaneously holds the governor’s office and majorities in both state legislative chambers.