[3] On August 8, 2023, Oregon Secretary of State LaVonne Griffin-Valade announced that as per the recently passed Oregon Ballot Measure 113, 10 Republican senators who participated in walkouts earlier in the year are not eligible for re-election for the next term.

[4] Some of the senators filed a lawsuit against the secretary of state,[5] with the Oregon Supreme Court eventually ruling unanimously that they could not be placed on the ballot in 2024 and 2026.

Contested nominations of recognized major parties (Democratic and Republican) for each district were determined by a primary election on May 21, 2024.

Write-in candidates must file a request with the Secretary of State's office for votes for them to be counted.

Candidates for the state Senate in 2024 were required to file to run from September 14, 2023, to March 12, 2024.