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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

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 C T Electoral history Years in office Party Senator #
Class 1 Class 3

See also

References

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