2026 Elections
The Oklahoma 2026 congressional primary was held on June 16, 2026. General Election Day is November 3, 2026.
Dates are approximate — states count the days differently and county schedules vary. Confirm yours at vote.gov. See all registration deadlines or early voting dates by state.
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See Oklahoma's current congressional delegation
Term end dates, party breakdown, and which seats are on the November ballot.
General Election · November 3, 2026
Quick Answer
Open seat — Markwayne Mullin resigned in March 2026 to become Secretary of Homeland Security, and appointed Sen. Alan Armstrong is not running for a full term. Kevin Hern took the Republican nomination outright with 69.8%. N'Kiyla Jasmine Thomas won the August 25 Democratic runoff with 61.2% over Jim Priest (38.8%), after leading the June round 45.2% to 23.9%.
November nominees
Kevin Hern
Won primary · 69.8%
N'Kiyla Jasmine Thomas
Won primary · 61.2%
Sevier White
Each won their own party's primary and advance to November 3, 2026 in a single-winner (majority runoff possible) contest.
All U.S. House seats in Oklahoma are on the 2026 ballot. Every House member runs for re-election every two years. View Oklahoma representatives →
Oklahoma's Class II Senate seat is up for election in 2026. The current senator is Alan Armstrong (R), appointed 2026 — open seat. Class II senators were last elected in 2020 and serve six-year terms.
Oklahoma holds a closed primary, meaning you must be registered with a political party to vote in that party's primary. Independent and unaffiliated voters cannot participate unless they re-register with a party before the registration deadline.
| June 16, 2026 | Primary Election (passed) |
| August 25, 2026 | Primary Runoff (passed) — if needed |
| October 2026 | Voter registration deadlines (check your state) |
| November 3, 2026 | General Election |
| January 3, 2027 | 120th Congress convenes |
You must be registered with a political party to vote in that party's primary. Independent/unaffiliated voters cannot participate unless they re-register before the deadline.
To vote in the November 3, 2026 general election, register by ≈ October 9, 2026 — 25 days before Election Day.
Check your registration status and find your polling place at vote.gov. Deadlines marked ≈ are computed from statute and can shift — see all registration deadlines by state.
See All State Primary Dates
Compare Oklahoma's primary to other states' 2026 schedules.
Kevin Hern won the Republican nomination with 69.8% of the vote, and N'Kiyla Jasmine Thomas won the Democratic nomination with 61.2%. They advance to the general election on November 3, 2026.
The November 3, 2026 ballot features Kevin Hern (R) vs N'Kiyla Jasmine Thomas (D) vs Sevier White (L) for Oklahoma's U.S. Senate seat.
The Oklahoma 2026 congressional primary is June 16, 2026. If no candidate wins the required threshold, a runoff will be held on August 25, 2026. The general election is November 3, 2026.
You must be registered with a political party to vote in that party's primary. Independent/unaffiliated voters cannot participate unless they re-register before the deadline.
All U.S. House seats in Oklahoma are on the 2026 primary ballot. Additionally, the U.S. Senate seat (Class II) is up for election. The current senator is Alan Armstrong (R), appointed 2026 — open seat. Many states also hold primaries for governor and state legislature on the same day.
Oklahoma holds a closed primary, meaning you must be registered with a political party to vote in that party's primary. Independent and unaffiliated voters cannot participate unless they re-register with a party before the registration deadline.
Voter registration deadlines vary but are typically 15–30 days before the primary. Because Oklahoma has a closed primary, you must also be registered with a party before the deadline to vote in a party primary. Check the Oklahoma Secretary of State website or vote.gov for the exact deadline.
The 2026 general election is on Tuesday, November 3, 2026. This date is the same for all 50 states — it is always the first Tuesday after the first Monday in November in even-numbered years.
Full state-by-state calendar, primary types (open, closed, jungle), and what is on the ballot.
Key dates for the 2026 midterm elections, from primaries to Election Day.
Why only one-third of Senate seats are up for election every two years.
Everyone who represents Oklahoma in Congress, with term end dates.
