Elections to the Montana House of Representatives were held on November 3, 2020.
Results summary.
Close races.
Districts where the margin of victory was under 10%:
Detailed results.
Districts 1-20.
District 1.
Incumbent Republican Steve Gunderson has represented the 1st District since 2017.
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District 2.
Incumbent Republican Neil Duram has represented the 2nd district since 2019.
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District 3.
Incumbent Democrat Debo Powers has represented the 3rd district since her appointment on November 5, 2019. Powers lost re-election to Republican Braxton Mitchell.
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District 4.
Incumbent Republican Matt Regier has represented the 4th district since 2017. 
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District 5.
Incumbent Democrat Dave Fern has represented the 5th district since 2017.
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District 6.
Incumbent Republican Carl Glimm has represented the 6th district since 2013. Glimm was term-limited and successfully ran for the Montana Senate. Republican Amy Regier won the open seat.
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District 7.
Incumbent Republican Frank Garner has represented the 7th district since 2015. 
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District 8.
Incumbent Republican John Fuller has represented the 8th district since 2019.
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District 9.
Incumbent Republican David Dunn has represented the 9th district since 2019. Dunn lost re-nomination to fellow Republican Brian Putnam. Putnam won the general election.
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District 10.
Incumbent Republican Mark Noland has represented the 10th district since 2015.
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District 11.
Incumbent Republican Derek Skees has represented the 11th district since 2017. 
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District 12.
Incumbent Republican House Speaker Greg Hertz has represented the 12th district since 2015. Hertz ran successfully for the Montana Senate and fellow Republican Linda Reksten won the open seat.
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District 13.
Incumbent Republican Bob Brown has represented the 13th district since 2015. Brown ran for the Montana Senate and fellow Republican Paul Fielder won the open seat. 
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District 14.
Incumbent Republican Denley Loge has represented the 14th district since 2017.
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District 15.
Incumbent Democrat Marvin Weatherwax Jr. has represented the 15th district since 2019.
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District 16.
Incumbent Democrat Tyson Runningwolf has represented the 16th district since 2019.
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District 17.
Incumbent Republican Ross Fitzgerald has represented the 17th district since 2017.
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District 18.
Incumbent Republican Llew Jones has represented the 18th district since 2019.
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District 19.
Incumbent Republican Wendy McKamey has represented the 19th district since 2017.
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District 20.
Incumbent Republican Fred Anderson has represented the 20th district since 2017.
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Districts 21-40.
District 21.
Incumbent Republican Ed Buttrey has represented the 21st district since 2019.
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District 22.
Incumbent Republican Lola Sheldon-Galloway has represented the 22nd district since 2017. {| class="wikitable plainrowheaders " style="; margin-right:1em; font-size:95%"
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District 23.
Incumbent Democrat Brad Hamlett has represented the 23rd district since 2017. He lost re-election to Republican Scot Kerns.
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District 24.
Incumbent Democrat Barbara Bessette has represented the 24th district since 2019. Bessette lost re-election to Republican Steven Galloway.
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District 25.
Incumbent Democrat Jasmine Krotkov has represented the 25th district since 2019. Krotkov lost re-election to Republican Steve Gist.
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District 26.
Incumbent Democrat Casey Schreiner has represented the 26th district since 2013. Schreiner was term-limited and ran for Lieutenant Governor. Former Republican 25th district representative Jeremy Trebas won the open seat.
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District 27.
Incumbent Republican Joshua Kassmier has represented the 27th district since 2019.
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District 28.
Incumbent Democrat Jacob Bachmeier has represented the 28th district since 2017. Bachmeier didn’t seek re-election and Republican Ed Hill won the open seat.
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District 29.
Incumbent Republican Dan Bartel has represented the 29th district since 2017.
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District 30.
Incumbent Republican Speaker pro tempore Wylie Galt has represented the 30th district since 2017. 
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District 31.
Incumbent Democrat Bridget Smith has represented the 31st district since 2013. Smith was term-limited and instead ran for the Montana Senate. State Senator and former representative Frank Smith won the open seat.
 {| class="wikitable plainrowheaders " style="; margin-right:1em; font-size:95%"
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District 32.
Incumbent Democrat Jonathan Windy Boy has represented the 32nd district since 2017.
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District 33.
Incumbent Republican Casey Knudsen has represented the 33rd district since 2017.
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District 34.
Incumbent Republican Rhonda Knudsen has represented the 34th district since 2019.
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District 35.
Incumbent Republican Joel Krautter has represented the 35th district since 2019. Krautter lost re-nomination to fellow Republican Brandon Ler. Ler won the general election unopposed.
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District 36.
Incumbent Republican Alan Doane has represented the 36th district since 2013. Doane was term-limited and couldn’t seek re-election. Republican Bob Phalen won the open seat unopposed.
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District 37.
Incumbent Republican Fredrick Moore has represented the 37th district since 2019. Moore lost re-nomination to fellow Republican Jerry Schillinger. Schillinger won the general election.
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District 38.
Incumbent Republican Kenneth Holmlund has represented the 38th district since 2015.{| class="wikitable plainrowheaders " style="; margin-right:1em; font-size:95%"
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District 39.
Incumbent Republican Geraldine Custer has represented the 39th district since 2015. {| class="wikitable plainrowheaders " style="; margin-right:1em; font-size:95%"
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District 40.
Incumbent Republican Barry Usher has represented the 40th district since 2017. 
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Districts 41-60.
District 41.
Incumbent Democrat Rae Peppers has represented the 41st district since 2013. Peppers was term-limited and couldn’t seek re-election. Fellow Democrat Rynalea Whiteman Pena won the open seat.
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District 42.
Incumbent Democrat Sharon Stewart-Peregoy has represented the 42nd district since 2017.
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District 43.
Incumbent Republican Peggy Webb has represented the 43rd district since 2017. Webb didn’t seek re-election and Republican Kerri Seekins-Crowe won the open seat.
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District 44.
Incumbent Republican Larry Brewster has represented the 44th district since his appointment on March 24, 2020. Brewster was elected to a full term.
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District 45.
Incumbent Republican Daniel Zolnikov has represented the 45th district since 2013. Zolnikov was term-limited and couldn’t seek re-election. His wife, Katie Zolnikov won the open seat.
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District 46.
Incumbent Republican Bill Mercer has represented the 46th district since 2019.
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District 47.
Incumbent Democrat Katharin Kelker has represented the 47th district since 2015.
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District 48.
Incumbent Democrat Jessica Karjala has represented the 48th district since 2015.
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District 49.
Incumbent Democrat Emma Kerr-Carpenter has represented the 49th district since 2018.
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District 50.
Incumbent Democrat Jade Bahr has represented the 50th district since 2019. Bahr lost re-election to Republican Mallerie Stromswold.
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District 51.
Incumbent Republican Frank Fleming has represented the 51st district since 2018.
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District 52.
Incumbent Republican Rodney Garcia has represented the 52nd district since 2019. Garcia ran for the Montana Senate and fellow Republican Jimmy Patelis won the open seat.
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District