United States Senate election in Oklahoma, 2026 (June 16 Democratic primary)

← 2022
U.S. Senate, Oklahoma
Democratic primary Republican primary General election
Election details
Filing deadline: April 3, 2026
Primary: June 16, 2026 Primary runoff: August 25, 2026 General: November 3, 2026
How to vote
Poll times: 7 a.m. to 7 p.m. Voting in Oklahoma
Race ratings
Cook Political Report: Solid Republican DDHQ and The Hill: Pending Inside Elections: Solid Republican Sabato's Crystal Ball: Safe Republican
Ballotpedia analysis
U.S. Senate battlegrounds U.S. House battlegrounds Federal and state primary competitiveness Ballotpedia's Election Analysis Hub, 2026
See also
U.S. Senate, Oklahoma U.S. Senate • 1st • 2nd • 3rd • 4th • 5th Oklahoma elections, 2026 U.S. Congress elections, 2026 U.S. Senate elections, 2026 U.S. House elections, 2026 Alabama U.S. Senate raceAlaska U.S. Senate raceArkansas U.S. Senate raceColorado U.S. Senate raceDelaware U.S. Senate raceGeorgia U.S. Senate raceIdaho U.S. Senate raceIllinois U.S. Senate raceIowa U.S. Senate raceKansas U.S. Senate raceKentucky U.S. Senate raceLouisiana U.S. Senate raceMaine U.S. Senate raceMassachusetts U.S. Senate raceMichigan U.S. Senate raceMinnesota U.S. Senate raceMississippi U.S. Senate raceMontana U.S. Senate raceNebraska U.S. Senate raceNew Hampshire U.S. Senate raceNew Jersey U.S. Senate raceNew Mexico U.S. Senate raceNorth Carolina U.S. Senate raceOklahoma U.S. Senate raceOregon U.S. Senate raceRhode Island U.S. Senate raceSouth Carolina U.S. Senate raceSouth Dakota U.S. Senate raceTennessee U.S. Senate raceTexas U.S. Senate raceVirginia U.S. Senate raceWest Virginia U.S. Senate raceWyoming U.S. Senate raceSubmit

A Democratic Party primary takes place on June 16, 2026, in Oklahoma to determine which Democratic candidate will run in the state's general election on November 3, 2026.

Candidate filing deadline	Primary election	General election
April 3, 2026	June 16, 2026	November 3, 2026

Heading into the election, the incumbent is Markwayne Mullin (Republican), who was first elected in 2022.

A primary election is an election in which registered voters select a candidate that they believe should be a political party's candidate for elected office to run in the general election. They are also used to choose convention delegates and party leaders. Primaries are state-level and local-level elections that take place prior to a general election. In Oklahoma, the Republican Party conducts a closed primary, in which only registered party members may participate. The Democratic Party holds a semi-closed primary, in which unaffiliated voters may participate.

For information about which offices are nominated via primary election, see this article.

This page focuses on Oklahoma's United States Senate Democratic primary. For more in-depth information on the state's Republican primary and the general election, see the following pages:

• United States Senate election in Oklahoma, 2026 (June 16 Republican primary)
• United States Senate election in Oklahoma, 2026

Candidates and election results

Note: The following list includes official candidates only. Ballotpedia defines official candidates as people who:

• Register with a federal or state campaign finance agency before the candidate filing deadline
• Appear on candidate lists released by government election agencies

Note: At this time, Ballotpedia is combining all declared candidates for this election into one list under a general election heading. As primary election dates are published, this information will be updated to separate general election candidates from primary candidates as appropriate.

Candidate profiles

There are currently no candidate profiles created for this race. Candidate profiles will appear here as they are created. Encourage the candidates in this race to complete Ballotpedia's Candidate Connection survey so that their profile will appear here.

Voting information

See also: Voting in Oklahoma

Ballotpedia will publish the dates and deadlines related to this election as they are made available.

Campaign finance

There are currently no declared candidates in this race. Know of one we missed? Click here to let us know.

Ballot access

The table below details filing requirements for U.S. Senate candidates in Oklahoma in the 2026 election cycle. For additional information on candidate ballot access requirements in Oklahoma, click here.

Filing requirements for U.S. Senate candidates, 2026
State	Office	Party	Signatures required	Filing fee	Filing deadline	Source
Oklahoma	U.S. Senate	All candidates	2% of the number of registered voters in the state	$2,000.00	4/3/2026	Source

See also

• United States Senate election in Oklahoma, 2026 (June 16 Republican primary)
• United States Senate election in Oklahoma, 2026
• United States Senate Democratic Party primaries, 2026
• United States Senate Republican Party primaries, 2026
• United States Senate elections, 2026
• U.S. Senate battlegrounds, 2026

External links

Suggest a link

• Search Google News for this topic

Footnotes

[show]

Oklahoma's current delegation to the United States Congress

Senators

James Lankford (R)

Markwayne Mullin (R)

Representatives

District 1

Kevin Hern (R)

District 2

Josh Brecheen (R)

District 3

Frank Lucas (R)

District 4

Tom Cole (R)

District 5

Stephanie Bice (R)

Republican Party (7)

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