16 of 33 seats in the Wisconsin State Senate 17 seats needed for a majority
Majority party
Minority party
Leader
Scott Fitzgerald (retired)
Janet Bewley
Party
Republican
Democratic
Leader's seat
13th–Juneau
25th–Mason
Last election
11 seats, 52.31%
6 seats, 46.90%
Seats before
18
13
Seats won
10
6
Seats after
21
12
Seat change
2
2
Popular vote
1,665,487
1,402,108
Percentage
53.8%
45.29%
Swing
1.5 pp
1.6 pp
Results of the elections: Republican hold Republican gain Democratic hold No election
President before election
Roger Roth
Republican
Elected President
Chris Kapenga
Republican
Elections in Wisconsin
Federal government
Presidential elections
1848
1852
1856
1860
1864
1868
1872
1876
1880
1884
1888
1892
1896
1900
1904
1908
1912
1916
1920
1924
1928
1932
1936
1940
1944
1948
1952
1956
1960
1964
1968
1972
1976
1980
1984
1988
1992
1996
2000
2004
2008
2012
2016
2020
2024
Presidential primaries
Democratic
2000
2004
2008
2016
2020
2024
Republican
2004
2008
2012
2016
2020
2024
U.S. Senate elections
1848
1849
1851
1854
1857
1861
1863
1866
1872
1875
1879
1881
1881 sp
1885
1887
1890
1891
1893
1897
1899
1903
1905
1907 sp
1909
1911
1914
1916
1918 sp
1920
1922
1925 sp
1926
1928
1932
1934
1938
1940
1944
1946
1950
1952
1956
1957 sp
1958
1962
1964
1968
1970
1974
1976
1980
1982
1986
1988
1992
1994
1998
2000
2004
2006
2010
2012
2016
2018
2022
2024
2028
U.S. House of Representatives elections
1848
1850
1852
1854
1856
1858
1860
1862
1863
2nd sp
1864
1866
1868
1870
2nd sp
1872
1874
1876
1878
1880
1882
1884
1886
5th sp
1887
8th sp
1888
1890
1892
1893
4th sp
1894
7th sp
1896
1898
1900
1902
1904
1906
2nd sp
1908
1910
1912
1914
1916
1918
6th sp
11th sp
1920
1922
1924
1926
1928
1930
6th sp
1931
1st sp
1932
1934
1936
1938
1940
1941
1st sp
1942
1944
1946
1947
2nd sp
1948
1950
1952
1953
9th sp
1954
1956
1958
1960
1962
1964
1966
1968
1969
7th sp
1970
1972
1974
1976
1978
1979
6th sp
1980
1982
1984
4th sp
1986
1988
1990
1992
1993
1st sp
1994
1996
1998
2000
2002
2004
2006
2008
2010
2012
2014
2016
2018
2020
7th sp
2022
2024
8th sp
State government
General elections
1995
2000
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
Gubernatorial elections
1848
1849
1851
1853
1855
1857
1859
1861
1863
1865
1867
1869
1871
1873
1875
1877
1879
1881
1884
1886
1888
1890
1892
1894
1896
1898
1900
1902
1904
1906
1908
1910
1912
1914
1916
1918
1920
1922
1924
1926
1928
1930
1932
1934
1936
1938
1940
1942
1944
1946
1948
1950
1952
1954
1956
1958
1960
1962
1964
1966
1968
1970
1974
1978
1982
1986
1990
1994
1998
2002
2006
2010
2012 (recall)
2014
2018
2022
2026
Lieutenant Gubernatorial elections
1968
2012 (recall)
Secretary of State elections
1978
2014
2018
2022
Attorney General elections
2014
2018
2022
Treasurer elections
2014
2022
Superintendent elections
2013
2017
2021
2025
State Senate elections
1934
1996
2008
2010
2011 (recall)
2012 (recall)
2012
2014
2016
2018
2020
2022
2024
2026
State Assembly elections
2008
2010
2012
2014
2016
2018
2020
2022
2024
Supreme Court elections
2008
2009
2011
2013
2015
2016
2017
2018
2019
2020
2023
2025
Ballot measures
2006
Referendum 1
Green Bay
Mayoral elections
1995
1999
2003
2007
2011
2015
2019
2023
Madison
Mayoral elections
1997 sp
1999
2003
2007
2011
2015
2019
2023
Milwaukee
Mayoral elections
1910
1996
2000
2004
2008
2012
2016
2020
2022 sp
2024
v
t
e
The 2020 Wisconsin Senate elections were held on Tuesday, November 3, 2020, at the Fall general election in Wisconsin. Sixteen of the 33 seats in the Wisconsin Senate were up for election—the even-numbered districts. Before the election, Republicans held 18 seats, Democrats held 13 seats, and 2 seats were vacant. Of the seats up for election, 7 were held by Republicans, 7 were held by Democrats, 1 was vacated by a Democratic resignation, and 1 was vacated by a Republican resignation. The primary election was held on August 11, 2020.
Republicans maintained control of the Senate but fell one seat short of a supermajority, defeating one Democratic incumbent and winning an open seat previously held by a Democrat. After the elections, Republicans were set to enter the 105th Wisconsin Legislature with 21 of 33 seats, but one member resigned due to election to another office, leaving them with 20 seats at the start of the legislative term.
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