2020 Oklahoma Senate election
The 2020 Oklahoma Senate election was held as part of the biennial elections in the United States. Oklahoma voters elected state senators in 24 of the state's 48 Senate districts. State senators serve four-year terms in the Oklahoma Senate.
Retirements
Two incumbents did not run for re-election in 2020. Those incumbents are:Republicans
- District 5: Joseph Silk: Retired
- District 35: Gary Stanislawski: Retired
Incumbents defeated
In primary elections
Republicans
Four Republicans lost renomination.- District 3: Wayne Shaw lost renomination to Blake Stephens.
- District 7: Larry Boggs lost renomination to Warren Hamilton.
- District 17: Ron Sharp lost renomination to Shane Jett.
- District 43: Paul Scott lost renomination to Jessica Garvin.
In the general election
Democrats
- District 37: Allison Ikley-Freeman lost to Cody Rogers.
Close races
| District | Winner | Margin |
| District 35 | Democratic | 1.8% |
| District 39 | Republican | 9.6% |
| District 45 | Republican | 15.0% |
| District 9 | Republican | 16.2% |