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List of United States senators from Wisconsin

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Current delegation

Wisconsin was admitted to the Union on May 29, 1848. Its current U.S. senators are Republican Ron Johnson (since 2011) and Democrat Tammy Baldwin (since 2013), making it one of seven states to have a split United States Senate delegation. William Proxmire was the state's longest serving senator (served 1957–1989).

List of senators[edit]

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 3

Class 3 U.S. senators belong to the electoral cycle that has recently been contested in 2004, 2010, 2016, and 2022. The next election will be in 2028.

# Senator Party Dates in office Electoral history T T Electoral history Dates in office Party Senator #
Vacant May 29, 1848 –
Jun 8, 1848
Wisconsin elected its senators 10 days after statehood. 1 30th 1 Wisconsin elected its senators 10 days after statehood. May 29, 1848 –
Jun 8, 1848
Vacant
1
Henry Dodge
Democratic Jun 8, 1848 –
Mar 3, 1857
Elected in 1848. Elected in 1848. Jun 8, 1848 –
Mar 3, 1855
Democratic
Isaac P. Walker
1
31st 2 Re-elected in 1849.
Retired.
Re-elected in 1851.
Retired.
2 32nd
33rd
34th 3 Elected in 1854.
Retired.
Mar 4, 1855 –
Mar 3, 1861
Republican
Charles Durkee
2
2
James R. Doolittle
Republican Mar 4, 1857 –
Mar 3, 1869
Elected in 1857. 3 35th
36th
37th 4 Elected in 1861. Mar 4, 1861 –
Mar 3, 1879
Republican
Timothy O. Howe
3
Re-elected in 1863.
Retired.
4 38th
39th
40th 5 Re-elected in 1866.
3
Matthew H. Carpenter
Republican Mar 4, 1869 –
Mar 3, 1875
Elected in 1869.
Lost re-election.
5 41st
42nd
43rd 6 Re-elected in 1872.
Lost re-election.
4
Angus Cameron
Republican Mar 4, 1875 –
Mar 3, 1881
Elected in 1875.
Retired.
6 44th
45th
46th 7 Elected in 1879.
Died.
Mar 4, 1879 –
Feb 24, 1881
Republican
Matthew H. Carpenter
4
  Feb 24, 1881 –
Mar 14, 1881
Vacant
5
Philetus Sawyer
Republican Mar 4, 1881 –
Mar 3, 1893
Elected in 1881. 7 47th
Elected to finish Carpenter's term.
Retired.
Mar 14, 1881 –
Mar 3, 1885
Republican
Angus Cameron
5
48th
49th 8 Elected in 1885.
Lost re-election.
Mar 4, 1885 –
Mar 3, 1891
Republican
John Coit Spooner
6
Re-elected in 1887.
Retired.
8 50th
51st
52nd 9 Elected in 1891.
Lost renomination.
Mar 4, 1891 –
Mar 3, 1897
Democratic
William F. Vilas
7
6
John L. Mitchell
Democratic Mar 4, 1893 –
Mar 3, 1899
Elected in 1893.
Retired.
9 53rd
54th
55th 10 Elected in 1897.[1] Mar 4, 1897 –
Apr 30, 1907
Republican
John Coit Spooner
8
7
Joseph V. Quarles
Republican Mar 4, 1899 –
Mar 3, 1905
Elected in 1899.
Retired.
10 56th
57th
58th 11 Re-elected in 1903.[2]
Resigned.
8
Robert M. La Follette
Republican Jan 4, 1906 –
Jun 18, 1925
Elected in 1905.
Did not assume office until Jan 4, 1906 after resigning as Governor of Wisconsin.
11 59th
60th
  Apr 30, 1907 –
May 17, 1907
Vacant
Elected to finish Spooner's term. May 17, 1907 –
Mar 3, 1915
Republican
Isaac Stephenson
9
61st 12 Re-elected in 1909.
Retired.
Re-elected in 1911. 12 62nd
63rd
64th 13 Elected in 1914.
Died.
Mar 4, 1915 –
Oct 21, 1917
Democratic
Paul O. Husting
10
Re-elected in 1916. 13 65th
  Oct 21, 1917 –
Apr 18, 1918
Vacant
Elected in 1918 to finish Husting's term. Apr 18, 1918 –
Mar 3, 1927
Republican
Irvine Lenroot
11
66th
67th 14 Re-elected in 1920.
Lost renomination.
Re-elected in 1922.
Died.
14 68th
69th
Vacant Jun 18, 1925 –
Sep 30, 1925
 
9
Robert M. La Follette Jr.
Republican Sep 30, 1925 –
Jan 3, 1947
Elected to finish his father's term
70th 15 Elected in 1926.
Lost renomination.
Mar 4, 1927 –
Mar 3, 1933
Republican
John J. Blaine
12
Re-elected in 1928. 15 71st
72nd
73rd 16 Elected in 1932.
Lost re-election.
Mar 4, 1933 –
Jan 3, 1939
Democratic
F. Ryan Duffy
13
Progressive Re-elected in 1934. 16 74th
75th
76th 17 Elected in 1938. Jan 3, 1939 –
Jan 3, 1963
Republican
Alexander Wiley
14
Re-elected in 1940.
Lost nomination as a Republican.
17 77th
78th
79th 18 Re-elected in 1944.
10
Joseph McCarthy
Republican Jan 3, 1947 –
May 2, 1957
Elected in 1946. 18 80th
81st
82nd 19 Re-elected in 1950.
Re-elected in 1952.
Died.
19 83rd
84th
85th 20 Re-elected in 1956.
Lost re-election.
Vacant May 3, 1957 –
Aug 27, 1957
 
11
William Proxmire
Democratic Aug 28, 1957 –
Jan 3, 1989
Elected to finish McCarthy's term
Re-elected in 1958. 20 86th
87th
88th 21 Elected in 1962. Jan 3, 1963 –
Jan 3, 1981
Democratic
Gaylord Nelson
15
Re-elected in 1964. 21 89th
90th
91st 22 Re-elected in 1968.
Re-elected in 1970. 22 92nd
93rd
94th 23 Re-elected in 1974.
Lost re-election.
Re-elected in 1976. 23 95th
96th
97th 24 Elected in 1980. Jan 3, 1981 –
Jan 3, 1993
Republican
Bob Kasten
16
Re-elected in 1982.
Retired.
24 98th
99th
100th 25 Re-elected in 1986.
Lost re-election.
12
Herb Kohl
Democratic Jan 3, 1989 –
Jan 3, 2013
Elected in 1988. 25 101st
102nd
103rd 26 Elected in 1992. Jan 3, 1993 –
Jan 3, 2011
Democratic
Russ Feingold
17
Re-elected in 1994. 26 104th
105th
106th 27 Re-elected in 1998.
Re-elected in 2000. 27 107th
108th
109th 28 Re-elected in 2004.
Lost re-election.
Re-elected in 2006.
Retired.
28 110th
111th
112th 29 Elected in 2010. Jan 3, 2011 –
present
Republican
Ron Johnson
18
13
Tammy Baldwin
Democratic Jan 3, 2013 –
present
Elected in 2012. 29 113th
114th
115th 30 Re-elected in 2016.
Re-elected in 2018. 30 116th
117th
118th 31 Re-elected in 2022.
To be determined in the 2024 election. 31 119th
120th
121st 32 To be determined in the 2028 election.
# Senator Party Years in office Electoral history T   T Electoral history Years in office Party Senator #
Class 1 Class 3

Living former senators[edit]

As of November 2024, there are two living former U.S. senators from Wisconsin. The most recent and most recently serving senator to die was Herb Kohl (1989–2013) on December 27, 2023.

Senator Term of office Date of birth (and age)
Bob Kasten 1981–1993 (1942-06-19) June 19, 1942 (age 82)
Russ Feingold 1993–2011 (1953-03-02) March 2, 1953 (age 71)

Superlatives[edit]

Longest service[edit]

Senator First served Last served Length of service
William Proxmire August 28, 1957Script error: No such module "Date table sorting". January 3, 1989Script error: No such module "Date table sorting". 31 years, 128 days
(11,451 days)
Alexander Wiley Script error: No such module "Date table sorting". Script error: No such module "Date table sorting". 24 years, 0 days
(8,766 days)
Herb Kohl January 3, 1989Script error: No such module "Date table sorting". January 3, 2013Script error: No such module "Date table sorting". 24 years, 0 days
(8,766 days)
Robert M. La Follette Jr. Script error: No such module "Date table sorting". Script error: No such module "Date table sorting". 21 years, 95 days
(7,765 days)
Robert M. La Follette Script error: No such module "Date table sorting". Script error: No such module "Date table sorting". 19 years, 165 days
(7,105 days)

Shortest service[edit]

Senator First served Last served Length of service
Paul O. Husting Script error: No such module "Date table sorting". Script error: No such module "Date table sorting". 2 years, 7 months, 2 weeks and 3 days
(962 days)
F. Ryan Duffy Script error: No such module "Date table sorting". Script error: No such module "Date table sorting". 5 years, 9 months, 4 weeks and 2 days
(2,131 days)
John L. Mitchell Script error: No such module "Date table sorting". Script error: No such module "Date table sorting". 5 years, 11 months, 3 weeks and 6 days
(2,190 days)
Joseph V. Quarles Script error: No such module "Date table sorting". Script error: No such module "Date table sorting". 5 years, 11 months, 3 weeks and 6 days
(2,190 days)
Charles Durkee Script error: No such module "Date table sorting". Script error: No such module "Date table sorting". 5 years, 11 months, 3 weeks and 6 days
(2,191 days)
William Freeman Vilas Script error: No such module "Date table sorting". Script error: No such module "Date table sorting". 5 years, 11 months, 3 weeks and 6 days
(2,191 days)
John J. Blaine Script error: No such module "Date table sorting". Script error: No such module "Date table sorting". 5 years, 11 months, 3 weeks and 6 days
(2,191 days)

Youngest at beginning of service[edit]

Senator Date of birth First served Age
Robert M. La Follette Jr. February 6, 1895 September 30, 1925 30 years, 7 months and 24 days
Isaac P. Walker November 2, 1815 June 8, 1848 32 years, 7 months and 6 days
Joseph McCarthy November 14, 1908 January 3, 1947 38 years, 1 month and 20 days
Bob Kasten June 19, 1942 January 3, 1981 38 years, 6 months and 15 days
Russ Feingold March 2, 1953 January 3, 1993 39 years, 10 months and 1 day

Oldest at end of service[edit]

Senator Date of birth Last served Age
Isaac Stephenson June 18, 1829 March 3, 1915 85 years, 8 months and 13 days
Alexander Wiley May 26, 1884 January 3, 1963 78 years, 7 months and 8 days
Herb Kohl February 7, 1935 January 3, 2013 77 years, 10 months and 27 days
Philetus Sawyer September 22, 1816 March 3, 1893 76 years, 5 months and 9 days
Henry Dodge October 12, 1782 March 3, 1857 74 years, 4 months and 19 days

See also[edit]


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Other articles of the topic Politics : Ewald Max Hoyer, Social Activist, Frank Blackburn, Anan Foundation, Uttarakhand Kranti Dal, Incumbent
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References[edit]

  1. "TWO SENATORS ELECTED". The New York Times. Jan 27, 1897. p. 3.
  2. "Senator Spooner Re-elected". The New York Times. Jan 28, 1903. p. 8.