99chambers

Montana State Senate · 2026 general · 25 of 50 seats up

Republicans keep a majority in the Montana State Senate

Democrats hold 20 seats and Republicans 30; 26 make a majority. 2 seats changed party.

26 for a majorityBefore the electionD 18R 32AfterD 20R 30D +2 · R −2

2 seats flipped to Democrats0 to Republicans

Seats not up in this election count with their holders. Source: Results and race calls: Montana Secretary of State (unofficial)Updated Nov 7, 2026, 3:01 PM ET

2Seats flipped2 to Democrats, 0 to Republicans
0Incumbents defeatedIn the general election
16Open seatsNo incumbent on the ballot
3Uncontested seats2 Democratic, 1 Republican
2Decided by under 5 pointsCalled and uncalled

Source: Results and race calls: Montana Secretary of State (unofficial)Updated Nov 7, 2026, 3:01 PM ET

Every race, by how close it was

All 24 races by the winner’s margin, D − R. The shaded band holds the 2 races decided by under 5 points. Ringed dots flipped; amber dots are still being counted. The 3 seats won without an opponent sit at the ends.

  • Democratic
  • Republican
  • Counting
  • Flipped
  • Under 5 points
R+60R+40R+20EvenD+20D+40D+60ClosestSD-42 D+1.1Widest flip to DSD-10 D+13.3

Unofficial returns. Source: Results and race calls: Montana Secretary of State (unofficial)Updated Nov 7, 2026, 3:01 PM ET

Seats that flipped

Districts that elected the other party.

Closest called races

Smallest winning margins.

Source: Results and race calls: Montana Secretary of State (unofficial)Updated Nov 7, 2026, 3:01 PM ET

Montana State Senate in other elections

Also on this ballot

Sources