Class 1
Class 1 U.S. Senators belong to the electoral cycle that has recently been contested in 1994, 2000, 2006, and 2012. The next election will be in 2018. |
C o n g r e s s |
Class 3
Class 3 U.S. Senators belong to the electoral cycle that has recently been contested in 1998, 2004, 2010, and 2016. The next election will be in 2022. |
# |
Senator |
Party |
Years in office |
Electoral history |
T e r m |
T e r m |
Electoral history |
Years in office |
Party |
Senator |
# |
Vacant |
May 29, 1848 – June 8, 1848 |
Wisconsin elected its Senators 10 days after statehood. |
1 |
30th Congress |
1 |
Wisconsin elected its Senators 10 days after statehood. |
May 29, 1848 – June 8, 1848 |
Vacant |
1 |
Henry Dodge |
Democratic |
June 8, 1848 – March 4, 1857 |
Elected in 1848. |
Elected in 1848. |
June 8, 1848 – March 4, 1855 |
Democratic |
Isaac P. Walker |
1 |
31st Congress |
2 |
Re-elected in 1849.
Retired. |
Re-elected in 1851.
Retired. |
2 |
32nd Congress |
33rd Congress |
34th Congress |
3 |
Elected in 1854.
[Data unknown/missing. You can help!] |
March 4, 1855 – March 4, 1861 |
Republican |
Charles Durkee |
2 |
2 |
James R. Doolittle |
Republican |
March 4, 1857 – March 4, 1869 |
Elected in 1857. |
3 |
35th Congress |
36th Congress |
37th Congress |
4 |
Elected in 1861. |
March 4, 1861 – March 4, 1879 |
Republican |
Timothy O. Howe |
3 |
Re-elected in 1863.
[Data unknown/missing. You can help!] |
4 |
38th Congress |
39th Congress |
40th Congress |
5 |
Re-elected in 1866. |
3 |
Matthew H. Carpenter |
Republican |
March 4, 1869 – March 4, 1875 |
Elected in 1868 or 1869.
Lost re-election. |
5 |
41st Congress |
42nd Congress |
43rd Congress |
6 |
Re-elected in 1872.
Lost re-election. |
4 |
Angus Cameron |
Republican |
March 4, 1875 – March 4, 1881 |
Elected in 1875.
Retired. |
6 |
44th Congress |
45th Congress |
46th Congress |
7 |
Elected in 1879.
Died. |
March 4, 1879 – February 24, 1881 |
Republican |
Matthew H. Carpenter |
4 |
|
February 24, 1881 – March 14, 1881 |
Vacant |
5 |
Philetus Sawyer |
Republican |
March 4, 1881 – March 4, 1893 |
Elected in 1881. |
7 |
47th Congress |
Elected to finish Carpenter's term.
Retired. |
March 14, 1881 – March 4, 1885 |
Republican |
Angus Cameron |
5 |
48th Congress |
49th Congress |
8 |
Elected in 1885.
Lost re-election. |
March 4, 1885 – March 4, 1891 |
Republican |
John Coit Spooner |
6 |
Re-elected in 1887.
Retired. |
8 |
50th Congress |
51st Congress |
52nd Congress |
9 |
Elected in 1890.
Lost renomination. |
March 4, 1891 – March 4, 1897 |
Democratic |
William F. Vilas |
7 |
6 |
John L. Mitchell |
Democratic |
March 4, 1893 – March 4, 1899 |
Elected in 1893.
Retired. |
9 |
53rd Congress |
54th Congress |
55th Congress |
10 |
Elected January 26, 1897.[1] |
March 4, 1897 – April 30, 1907 |
Republican |
John Coit Spooner |
8 |
7 |
Joseph V. Quarles |
Republican |
March 4, 1899 – March 4, 1905 |
Elected in 1899.
Retired. |
10 |
56th Congress |
57th Congress |
58th Congress |
11 |
Re-elected in 1903.
Resigned. |
Vacant |
March 4, 1905 – January 2, 1906 |
|
11 |
59th Congress |
8 |
Robert M. La Follette, Sr. |
Republican |
January 2, 1906 – June 18, 1925 |
Elected late in 1905. |
60th Congress |
|
April 30, 1907 – May 17, 1907 |
Vacant |
Elected to finish Spooner's term. |
May 17, 1907 – March 4, 1915 |
Republican |
Isaac Stephenson |
9 |
61st Congress |
12 |
Re-elected in 1909.
Retired. |
Re-elected in 1911. |
12 |
62nd Congress |
63rd Congress |
64th Congress |
13 |
Elected in 1914.
Died. |
March 4, 1915 – October 21, 1917 |
Democratic |
Paul O. Husting |
10 |
Re-elected in 1916. |
13 |
65th Congress |
|
October 21, 1917 – April 18, 1918 |
Vacant |
Elected to finish Husting's term. |
April 18, 1918 – March 4, 1927 |
Republican |
Irvine Lenroot |
11 |
66th Congress |
67th Congress |
14 |
Re-elected in 1920.
Lost renomination. |
Re-elected in 1922.
Died. |
14 |
68th Congress |
69th Congress |
Vacant |
June 18, 1925 – September 30, 1925 |
|
9 |
Robert M. La Follette, Jr. |
Republican |
September 30, 1925 – January 3, 1947 |
Elected to finish his father's term |
70th Congress |
15 |
Elected in 1926.
Lost renomination. |
March 4, 1927 – March 4, 1933 |
Republican |
John J. Blaine |
12 |
Re-elected in 1928. |
15 |
71st Congress |
72nd Congress |
73rd Congress |
16 |
Elected in 1932.
Lost re-election. |
March 4, 1933 – January 3, 1939 |
Democratic |
F. Ryan Duffy |
13 |
Progressive |
Re-elected in 1934. |
16 |
74th Congress |
75th Congress |
76th Congress |
17 |
Elected in 1938. |
January 3, 1939 – January 3, 1963 |
Republican |
Alexander Wiley |
14 |
Republican |
Re-elected in 1940.
Lost renomination. |
17 |
77th Congress |
78th Congress |
79th Congress |
18 |
Re-elected in 1944. |
10 |
Joseph McCarthy |
Republican |
January 3, 1947 – May 2, 1957 |
Elected in 1946. |
18 |
80th Congress |
81st Congress |
82nd Congress |
19 |
Re-elected in 1950. |
Re-elected in 1952.
Died. |
19 |
83rd Congress |
84th Congress |
85th Congress |
20 |
Re-elected in 1956.
Lost re-election. |
Vacant |
May 3, 1957 – August 27, 1957 |
|
11 |
William Proxmire |
Democratic |
August 28, 1957 – January 3, 1989 |
Elected to finish McCarthy's term |
Re-elected in 1958. |
20 |
86th Congress |
87th Congress |
88th Congress |
21 |
Elected in 1962. |
January 8, 1963 – January 3, 1981 |
Democratic |
Gaylord A. Nelson |
15 |
Re-elected in 1964. |
21 |
89th Congress |
90th Congress |
91st Congress |
22 |
Re-elected in 1968. |
Re-elected in 1970. |
22 |
92nd Congress |
93rd Congress |
94th Congress |
23 |
Re-elected in 1974.
Lost re-election. |
Re-elected in 1976. |
23 |
95th Congress |
96th Congress |
97th Congress |
24 |
Elected in 1980. |
January 3, 1981 – January 3, 1993 |
Republican |
Robert W. Kasten, Jr. |
16 |
Re-elected in 1982.
Retired. |
24 |
98th Congress |
99th Congress |
100th Congress |
25 |
Re-elected in 1986.
Lost re-election. |
12 |
Herb Kohl |
Democratic |
January 3, 1989 – January 3, 2013 |
Elected in 1988. |
25 |
101st Congress |
102nd Congress |
103rd Congress |
26 |
Elected in 1992. |
January 3, 1993 – January 3, 2011 |
Democratic |
Russ Feingold |
17 |
Re-elected in 1994. |
26 |
104th Congress |
105th Congress |
106th Congress |
27 |
Re-elected in 1998. |
Re-elected in 2000. |
27 |
107th Congress |
108th Congress |
109th Congress |
28 |
Re-elected in 2004.
Lost re-election. |
Re-elected in 2006.
Retired. |
28 |
110th Congress |
111th Congress |
112th Congress |
29 |
Elected in 2010. |
January 3, 2011 – Present |
Republican |
Ron Johnson |
18 |
13 |
Tammy Baldwin |
Democratic |
January 3, 2013 – Present |
Elected in 2012. |
29 |
113th Congress |
114th Congress |
115th Congress |
39 |
Re-elected in 2016. |
To be determined in the 2018 election. |
30 |
116th Congress |
117th Congress |
118th Congress |
31 |
To be determined in the 2022 election. |
# |
Senator |
Party |
Years in office |
Electoral history |
T e r m |
|
T e r m |
Electoral history |
Years in office |
Party |
Senator |
# |
Class 1 |
Class 3 |