 
An election was held on November 8, 2016, to elect 25 members to Montana's Senate. The election coincided with elections for other offices, including the Presidency, U.S. House of Representatives, Governorship, and state house. The primary election was held on June 7, 2016.
Detailed Results.
Districts 2–25.
District 2.
Incumbent Republican Dee Brown has represented the 2nd district since 2013.
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! scope="col" style="width: 17em" |Candidate
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! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
District 3.
Incumbent Republican Bruce Tutvedt has represented the 3rd district since 2009. Tutvedt was term-limited and couldn't seek re-election. State Representative Keith Regier won the open seat.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
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! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
District 6.
Incumbent Republican Janna Taylor has represented the 6th district since 2013. Taylor didn't seek re-election. State Representative Albert Olszewski won the open seat.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
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! colspan="3" style="text-align:right;" | Total votes
District 7.
Incumbent Republican Jennifer Fielder has represented the 7th district since 2013.
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! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
District 10.
Incumbent Rick Ripley has represented the 10th district since 2009. Ripley was term-limited and couldn't seek re-election.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
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! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
District 15.
Incumbent Democrat Brad Hamlett has represented the 15th district since 2009. Hamlett was term-limited and he successfully ran for the Montana house. Republican state representative Ryan Osmundson won the open seat.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
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! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
District 16.
Incumbent Democrat Jonathan Windy Boy has represented the 16th district since 2009. Windy Boy was term-limited and he successfully ran for the Montana house. Former state Senator Frank Smith won the open seat.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
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! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
District 17.
Incumbent Republican John Brenden has represented the 17th district since 2009. Brenden was term-limited and couldn't seek re-election. 
! scope="col" colspan="2" style="width: 15em" |Party
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! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
District 18.
Incumbent Republican Matt Rosendale has represented the 18th district since 2013. Rosendale retired and successfully ran for state auditor.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
! scope="col" style="width: 5em" |Votes
! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
District 21.
Incumbent Democrat Sharon Stewart-Peregoy has represented the 21st district since 2009. Stewart-Peregoy was term-limited and she successfully ran for the Montana house.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
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! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
District 23.
Incumbent Republican Roger Webb has represented the 23rd district since 2013.
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! colspan="3" style="text-align:right;" | Total votes
District 25.
Incumbent Democrat Robyn Driscoll has represented the 25th district and its predecessors since 2013. Driscoll didn't seek re-election.
! scope="col" colspan="2" style="width: 15em" |Party
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! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
Districts 26–47.
District 26.
Incumbent Republican Elsie Arntzen has represented the 26th district and its predecessors since 2013. Arntzen retired to run for Montana Superintendent of Public Instruction. Democratic state representative Margaret MacDonald won the open seat.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
! scope="col" style="width: 5em" |Votes
! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
District 28.
Incumbent Republican Taylor Brown has represented the 28th district since 2009. Brown was term-limited and couldn't seek re-election.
! scope="col" colspan="2" style="width: 15em" |Party
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! colspan="3" style="text-align:right;" | Total votes
District 31.
Incumbent Democrat Mike Phillips has represented the 31st district since 2013.
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! colspan="3" style="text-align:right;" | Total votes
District 35.
Incumbent Republican Scott Sales has represented the 35th district and its predecessors since 2013.
! scope="col" colspan="2" style="width: 15em" |Party
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! colspan="3" style="text-align:right;" | Total votes
District 36.
Incumbent Republican Senate President Debby Barrett has represented the 36th district since 2009. Barrett was term-limited and couldn't seek re-election.
! scope="col" colspan="2" style="width: 15em" |Party
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! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
District 37.
Incumbent Democrat Minority Leader Jon Sesso has represented the 37th district since 2013.
! scope="col" colspan="2" style="width: 15em" |Party
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! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
District 38.
Incumbent Democrat Jim Keane has represented the 38th district since 2009. Keane was term-limited and he successfully ran for the Montana house. State representative Edith McClafferty won the open seat.
! scope="col" colspan="2" style="width: 15em" |Party
! scope="col" style="width: 17em" |Candidate
! scope="col" style="width: 5em" |Votes
! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
District 39.
Incumbent Democrat Gene Vuckovich has represented the 39th district since 2011.
! scope="col" colspan="2" style="width: 15em" |Party
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! colspan="3" style="text-align:right;" | Total votes
District 40.
Incumbent Democrat Christine Kaufmann has represented the 40th district since 2007. Kaufmann was term-limited and couldn't seek re-election.
! scope="col" colspan="2" style="width: 15em" |Party
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! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
District 44.
Incumbent Republican Majority Leader Fred Thomas has represented the 44th district since 2013.
! scope="col" colspan="2" style="width: 15em" |Party
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! colspan="3" style="text-align:right;" | Total votes
District 45.
Incumbent Democrat Dick Barrett has represented the 45th district and its predecessors since 2013.
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! colspan="3" style="text-align:right;" | Total votes
District 46.
Incumbent Democrat Sue Malek has represented the 46th district since 2013.
! scope="col" colspan="2" style="width: 15em" |Party
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! colspan="3" style="text-align:right;" | Total votes
District 47.
Incumbent Democrat Cliff Larsen has represented the 47th district since 2009. Larsen was term-limited and couldn't seek re-election. Republican state representative Dan Salomon won the open seat.
! scope="col" colspan="2" style="width: 15em" |Party
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! scope="col" style="width: 3.5em" |%
! colspan="3" style="text-align:right;" | Total votes
References.
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