List of United States senators from Montana

Montana was admitted to the Union on November 8, 1889, and elects U.S. senators to classes 1 and 2. Its current U.S. senators are Democrat Jon Tester (serving since 2007) and Republican Steve Daines (serving since 2015), making it one of five states to have a United States Senate delegation split between Republican and Democratic caucusing senators. Max Baucus is the state's longest serving senator, serving from 1978 to 2014.

Current delegation

List of senators

Class 1
Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2000, 2006, 2012, and 2018. The next election will be in 2024.
C Class 2
Class 2 U.S. senators belong to the electoral cycle that has recently been contested in 2002, 2008, 2014, and 2020. The next election will be in 2026.
#SenatorPartyDates in officeElectoral historyTTElectoral historyDates in officePartySenator#
VacantNov 8, 1889 –
Jan 1, 1890
Montana elected its first senators two months after admission to the Union.151st1Montana elected its first senators two months after admission to the Union.Nov 8, 1889 –
Jan 2, 1890
Vacant
1
Wilbur F. Sanders
RepublicanJan 1, 1890 –
Mar 3, 1893
Elected in 1890.
Lost re-election.
Elected in 1890.
Retired.
Jan 2, 1890 –
Mar 3, 1895
Republican
Thomas C. Power
1
52nd
VacantMar 3, 1893 –
Jan 16, 1895
Legislature failed to elect.253rd
2
Lee Mantle
RepublicanJan 16, 1895 –
Mar 3, 1899
Elected to finish vacant term.
Lost renomination.
54th2Elected in Jan 1895.[1]
Lost re-election.
Mar 4, 1895 –
Mar 3, 1901
Republican
Thomas H. Carter
2
Silver
Republican
55th
3
William Clark
DemocraticMar 4, 1899 –
May 15, 1900
Elected in 1899.
Resigned to avoid claim of election fraud.
356th
VacantMay 15, 1900 –
Mar 7, 1901
Clark was appointed to continue his term, but did not qualify.
57th3Elected in 1901.
Retired.
Mar 4, 1901 –
Mar 3, 1907
Democratic
William Clark
3
4
Paris Gibson
DemocraticMar 7, 1901 –
Mar 3, 1905
Elected to finish Clark's term.[2][3]
Retired.
58th
5
Thomas H. Carter
RepublicanMar 4, 1905 –
Mar 3, 1911
Elected Jan 16, 1905.[4]
Lost re-election.
459th
60th4Elected Jan 16, 1907.[5]
Lost re-election as a Progressive.
Mar 4, 1907 –
Mar 3, 1913
Republican
Joseph M. Dixon
4
61st
6
Henry L. Myers
DemocraticMar 4, 1911 –
Mar 3, 1923
Elected Mar 2, 1911.562nd
63rd5Elected Jan 14, 1913.Mar 4, 1913 –
Mar 2, 1933
Democratic
Thomas J. Walsh
5
64th
Re-elected in 1916.
Retired.
665th
66th6Re-elected in 1918.
67th
7
Burton K. Wheeler
DemocraticMar 4, 1923 –
Jan 3, 1947
Elected in 1922.768th
69th7Re-elected in 1924.
70th
Re-elected in 1928.871st
72nd8Re-elected in 1930.
Died.[6]
 Mar 2, 1933 –
Mar 13, 1933
Vacant
73rd
Appointed to continue Walsh's term.
Lost nomination to finish Walsh's term.
Mar 13, 1933 –
Nov 6, 1934
Democratic
John E. Erickson
6
Elected to finish Walsh's term.[7]Nov 7, 1934 –
Jan 3, 1961
Democratic
James E. Murray
7
Re-elected in 1934.974th
75th9Re-elected in 1936.
76th
Re-elected in 1940.
Lost renomination.
1077th
78th10Re-elected in 1942.
79th
8
Zales Ecton
RepublicanJan 3, 1947 –
Jan 3, 1953
Elected in 1946.
Lost re-election.
1180th
81st11Re-elected in 1948.
82nd
9
Mike Mansfield
DemocraticJan 3, 1953 –
Jan 3, 1977
Elected in 1952.[8]1283rd
84th12Re-elected in 1954.
Retired.
85th
Re-elected in 1958.1386th
87th13Elected in 1960.[9]Jan 3, 1961 –
Jan 12, 1978
Democratic
Lee Metcalf
8
88th
Re-elected in 1964.1489th
90th14Re-elected in 1966.
91st
Re-elected in 1970.
Retired.
1592nd
93rd15Re-elected in 1972.
Died.
94th
10
John Melcher
DemocraticJan 3, 1977 –
Jan 3, 1989
Elected in 1976.1695th
 Jan 12, 1978 –
Jan 22, 1978
Vacant
Appointed to finish Metcalf's term.
Lost nomination to full term.
Resigned early to give successor preferential seniority.
Jan 22, 1978 –
Dec 14, 1978
Democratic
Paul G. Hatfield
9
 Dec 14, 1978 –
Dec 15, 1978
Vacant
Appointed early to finish Metcalf's term, having already been elected to the next term.[10]Dec 15, 1978 –
Feb 6, 2014
Democratic
Max Baucus
10
96th16Elected in 1978.
97th
Re-elected in 1982.
Lost re-election.
1798th
99th17Re-elected in 1984.
100th
11
Conrad Burns
RepublicanJan 3, 1989 –
Jan 3, 2007
Elected in 1988.18101st
102nd18Re-elected in 1990.
103rd
Re-elected in 1994.19104th
105th19Re-elected in 1996.
106th
Re-elected in 2000.
Lost re-election.
20107th
108th20Re-elected in 2002.
109th
12
Jon Tester
DemocraticJan 3, 2007 –
present
Elected in 2006.21110th
111th21Re-elected in 2008.
Announced retirement, then resigned to become U.S. Ambassador to China.
112th
Re-elected in 2012.22113th
 Feb 6, 2014 –
Feb 9, 2014
Vacant
Appointed to finish Baucus's term.
Ran for election to full term, but withdrew.
Feb 9, 2014 –
Jan 3, 2015
Democratic
John Walsh
11
114th22Elected in 2014.Jan 3, 2015 –
present
Republican
Steve Daines
12
115th
Re-elected in 2018.23116th
117th23Re-elected in 2020.
118th
To be determined in the 2024 election.23119th
120th24To be determined in the 2026 election.
#SenatorPartyYears in officeElectoral historyTCTElectoral historyYears in officePartySenator#
Class 1 Class 2

See also

References