2026 Missouri State Senate election

2026 Missouri Senate election
November 3, 2026 (2026-11-03)
17 even-numbered districts in the Missouri Senate
18 seats needed for a majority
  Majority party Minority party
 
Leader Cindy O'Laughlin Doug Beck
Party Republican Democratic
Leader since January 8, 2025 January 5, 2018
Leader's seat 18th - Shelbina 1st - Affton
Seats before 24 10
Map of the incumbents:
     Republican incumbent      Democratic incumbent
     No election
President pro tempore before election

Cindy O'Laughlin
Republican

 Elected President pro tempore

TBD

The 2026 Missouri Senate election is to take place on Tuesday, November 3, 2026, with the primary election are to take place on Tuesday, August 4, 2026. Missouri voters selected state senators in the 17 even-numbered districts of the Senate to serve four-year terms.

The election coincides with United States national elections and Missouri state elections, including U.S. House, Auditor, and Missouri House.

Following the previous election in 2024, Republicans held a 24-to-10-seat supermajority over Democrats. The balance of power remained unchanged with Republicans keeping their supermajority of 24-to-10 over Democrats.

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