Incumbent: Ryan Zinke · Republican
Ryan Busse (Democratic Party) is running for election to the U.S. House to represent Montana's 1st Congressional District. He is on the ballot in the Democratic primary on June 2, 2026.
Sam Forstag (Democratic Party) is running for election to the U.S. House to represent Montana's 1st Congressional District. He is on the ballot in the Democratic primary on June 2, 2026.
Aaron Flint (Republican Party) is running for election to the U.S. House to represent Montana's 1st Congressional District. He is on the ballot in the Republican primary on June 2, 2026.
Christi Jacobsen (Republican Party) is the Montana Secretary of State. She assumed office on January 4, 2021. Her current term ends on January 1, 2029. Jacobsen (Republican Party) is running for election to the U.S. House to represent Montana's 1st Congressional District. She is on the ballot in the Republican primary on June 2, 2026.
Russell Cleveland (Democratic Party) is running for election to the U.S. House to represent Montana's 1st Congressional District. He is on the ballot in the Democratic primary on June 2, 2026.
Albert Olszewski (Republican Party) is running for election to the U.S. House to represent Montana's 1st Congressional District. He is on the ballot in the Republican primary on June 2, 2026. Olszewski (Republican Party) (also known as Doc) was a member of the Montana State Senate, representing District 6. He assumed office in 2017. He left office on January 4, 2021.
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Monica Tranel (Democratic Party) is running for election to the Montana House of Representatives to represent District 92. She is on the ballot in the Democratic primary on June 2, 2026.
Ryan K. Zinke (Republican Party) is a member of the U.S. House, representing Montana's 1st Congressional District. He assumed office on January 3, 2023. His current term ends on January 3, 2027. Zinke (Republican Party) ran for re-election to the U.S. House to represent Montana's 1st Congressional District. He won in the general election on November 5, 2024. On March 2, 2026, Zinke announced he would not seek re-election to the U.S. House of Representatives.
Cory Moran (Republican Party) ran for election to the U.S. House to represent Montana's 1st Congressional District. He did not appear on the ballot for the Republican primary on June 4, 2024.
Dennis Hayes (Libertarian Party) ran for election to the U.S. House to represent Montana's 1st Congressional District. He lost in the general election on November 5, 2024.
