Incumbent RepublicanDee Brown had represented the 2nd district since 2013. Brown was term-limited and could not seek re-election. State RepresentativeCarl Glimm won the open seat.
Montana Senate 2nd district general election, 2020
Incumbent RepublicanAlbert Olszewski had represented the 6th district since 2017. Olszewski unsuccessfully sought the Republican nomination forGovernor. Term-limited state representative and state House SpeakerGreg Hertz won the open seat.
Montana Senate 6th district general election, 2020
Incumbent DemocratFrank Smith had represented the 16th district since 2017. Smith chose not to seek re-election, and instead successfully ran for a seat in theMontana House.
Montana Senate 16th district general election, 2020
Incumbent RepublicanRoger Webb had represented the 23rd district since 2013. Webb was term-limited and could not seek re-election. Former state representativeTom McGillvray won the open seat.
Montana Senate 23rd district general election, 2020
Incumbent DemocratMargaret MacDonald had represented the 26th district since 2017. She ran for re-election to a 2nd term, but was defeated by RepublicanChris Friedel.
Montana Senate 26th district general election, 2020
Incumbent RepublicanTom Richmond had represented the 28th district since 2017. Former Public Service Commissioner and state representativeBrad Molnar defeated Richmond in the Republican primary.
Montana Senate 28th district general election, 2020
Incumbent DemocratMike Phillips had represented the 31st district since 2013. Phillips was term-limited and could not seek re-election. State RepresentativeChristopher Pope won the open seat.
Montana Senate 31st district general election, 2020
Incumbent RepublicanScott Sales had represented the 35th district and its predecessors since 2013. Sales was term-limited and could not seek re-election, he instead ranSecretary of State.
Montana Senate 35th district general election, 2020
Incumbent Republican Majority LeaderFred Thomas had represented the 44th district since 2013. Thomas was term-limited and could not seek re-election. RepresentativeTheresa Manzella won the open seat.
Montana Senate 44th district general election, 2020
Incumbent DemocratDick Barrett had represented the 45th district and its predecessors since 2013. Barrett was term-limited and could not seek re-election.
Montana Senate 45th district general election, 2020