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      Data: MIT Election Lab, VEST, Census Bureau
      Home/Elections/2026/US Senate/Oklahoma
      2026 ForecastSafe R
      2026·US Senate·Oklahoma

      Oklahoma US Senate

      Incumbent
      RMarkwayne Mullin
      Senate Class 2

      Race Analysis

      Analysis coming soon.

      Updated 2026-02-18

      Candidates & Primaries

      Democratic Candidates

      TBDDRumored

      No major Dem challenger expected

      Democratic PrimaryPolymarket

      Will Rebekah LaVann be the Democratic nominee for Senate in Oklahoma?

      Data from Polymarket prediction markets

      Republican Candidates

      Markwayne MullinRIncumbent

      Junior senator from Oklahoma since 2023

      6W-0L6 races
      Full profile →

      State Demographics

      Oklahoma vs. National · Pop. 4.0M

      White (non-Hispanic)62.1%
      National: 57.4%
      Black7.0%
      National: 12.2%
      Hispanic/Latino12.7%
      National: 19.3%
      Asian2.4%
      National: 6.0%
      College Degree28.5%
      National: 35.6%
      Median Income$65,795
      National: $83,960
      Median Age37.1
      National: 39.1

      Seat History

      US Senate in Oklahoma(Class I)

      2022
      James LankfordREP
      R+32.2
      2022(S)
      Markwayne MullinREP
      R+26.5
      2020
      James M InhofeREP
      R+30.2
      2016
      James LankfordREP
      R+43.2
      2014(S)
      James LankfordREP
      R+38.9
      2014
      James M InhofeREP
      R+39.5
      2010
      Tom A CoburnREP
      R+44.5
      2008
      James M InhofeREP
      R+17.5
      2004
      Tom A CoburnREP
      R+11.5
      2002
      James M InhofeREP
      R+21.0
      1998
      Don NicklesREP
      R+35.1
      1996
      James M InhofeREP
      R+16.6
      1994(S)
      James M InhofeREP
      R+15.4
      1992
      Don NicklesREP
      R+20.4
      1990
      David L BorenDEM
      D+66.3
      View all US Senate history for Oklahoma →

      Also in Oklahoma, 2026

      Governor
      Safe R      ← 2026 Forecast Overview
      ← 2026 Forecast OverviewOklahoma profileAll elections