The Montana State Senate is, along with the Montana House of Representatives, one of the two houses that composes the Montana Legislature, the state legislative branch of the U.S. state of Montana. The body is composed of 50 senators elected for four years. Half of the Senate is up for election every two years.
Composition of the Senate
69th Legislature – 2025–2026
{|class=wikitable style="text-align:center"
|- style="vertical-align:bottom;"
!rowspan=3|Affiliation
!colspan=2|Party <div style="font-size:80%">(Shading indicates majority caucus)</div>
!rowspan=3|Total
!
|-style="height:5px"
| style="background-color:" |
| style="background-color:" |
|style="background: black"|
|-
!Republican
!Democratic
!Vacant
|-
!nowrap style="font-size:80%"| 65th Legislature (2019–2020)
|| 30
| 20
! 50
|0
|-
|colspan=5|
|-
!nowrap style="font-size:80%"| 67th Legislature (2021–2022)
|| 31
| 19
! 50
|0
|-
|colspan=5|
|-
!nowrap style="font-size:80%"| 68th Legislature (2023–2024)
|| 34
| 16
! 50
|0
|-
!nowrap style="font-size:80%"| 69th Legislature (2025–2026)
|| 32
| 18
! 50
|0
|-
!Latest voting share
!|
!
!colspan=3|
|}
Members of the Montana Senate
Montana limits its State Senators to two four-year terms (8 years) in any 16-year period.
Senate members
{|class= "sortable wikitable"
!District
!Name
!Party
!Residence
!Start
!Term Limited
|-
|1
|
| |Rep
|Eureka
|2018
|Yes
|-
|2
|
| |Dem
|Whitefish
|2024
|No
|-
|3
|
| |Rep
|Kila
|2020
|No
|-
|4
|
| |Rep
|Kalispell
|2022
|No
|-
|5
|
| |Rep
|Kalispell
|2024
|No
|-
|6
|
| |Rep
|Bigfork
|2022
|No
|-
|7
|
| |Rep
|Polson
|2020
|No
|-
|8
|
| |Dem
|Browning
|2018
|Yes
|-
|9
|
| |Rep
|Ethridge
|2018
|Yes
|-
|10
|
| |Rep
|Great Falls
|2022
|No
|-
|11
|
| |Rep
|Great Falls
|2022
|No
|-
|12
|
| |Rep
|Great Falls
|2022
|No
|-
|13
|
| |Rep
|Fort Benton
|2024
|No
|-
|14
|
| |Rep
|Chester
|2018
|Yes
|-
|15
|
| |Rep
|Glasgow
|2024
|No
|-
|16
|
| |Dem
|Box Elder
|2024
|No
|-
|17
|
| |Rep
|Lindsay
|2024
|No
|-
|18
|
| |Rep
|Miles City
|2018
|Yes
|-
|19
|
| |Rep
|Billings
|2022
|No
|-
|20
|
| |Rep
|Billings
|2024
|No
|-
|21
|
| |Rep
|Hardin
|2024
|No
|-
|22
|
| |Rep
|Billings
|2022
|No
|-
|23
|
| |Dem
|Billings
|2024
|No
|-
|24
|
| |Rep
|Billings
|2024
|No
|-
|25
|
| |Rep
|Billings
|2022
|No
|-
|26
|
| |Rep
|Billings
|2020
|No
|-
|27
|
| |Rep
|Billings
|2024
|No
|-
|28
|
| |Rep
|Columbus
|2022
|No
|-
|29
|
| |Rep
|Big Timber
|2018
|Yes
|-
|30
|
| |Dem
|Helena
|2024
|No
|-
|31
|
| |Dem
|Belgrade
|2018
|Yes
|-
|32
|
| |Dem
|Bozeman
|2022
|No
|-
|33
|
| |Dem
|Bozeman
|2020
|No
|-
|34
|
| |Rep
|Belgrade
|2022
|No
|-
|35
|
| |Rep
|Ennis
|2024
|No
|-
|36
|
| |Dem
|Anaconda
|2024
|No
|-
|37
|
| |Dem
|Butte
|2024
|No
|-
|38
|
| |Rep
|Elliston
|2024
|No
|-
|39
|
| |Rep
|Martinsdale
|2024
|No
|-
|40
|
| |Dem
|Helena
|2024
|No
|-
|41
|
| |Dem
|Helena
|2018
|Yes
|-
|42
|
| |Dem
|Helena
|2022
|No
|-
|43
|
| |Rep
|Hamilton
|2018
|Yes
|-
|44
|
| |Rep
|Hamilton
|2020
|No
|-
|45
|
| |Rep
|St. Regis
|2024
|No
|-
|46
|
| |Dem
|Arlee
|2024
|No
|-
|47
|
| |Dem
|Missoula
|2020
|No
|-
|48
|
| |Dem
|Missoula
|2022
|No
|-
|49
|
| |Dem
|Missoula
|2022
|No
|-
|50
|
| |Dem
|Missoula
|2022
|No
|}
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