| Image Caption: | 2024 map defined in 2022 map defined in Johnson v. Wisconsin Elections Commission 2011 map was defined in composed of Assembly districts 91, 92, and 93 |
| Chamber: | Senate |
| State: | Wisconsin |
| District: | 31 |
| Representative: | Jeff Smith |
| Residence: | Eau Claire |
| Party: | Democratic |
| Incumbentsince: | January 7, 2019 (years) |
| Population: | 178,440 |
| Population Year: | 2020 |
| Voting Age: | 140,901 |
| Percent White: | 90.31 |
| Percent Black: | 1.51 |
| Percent Hispanic: | 2.14 |
| Percent Asian: | 3.68 |
| Percent Native American: | 1.62 |
| Percent Pacific Islander: | 0.12 |
| Website: | Official website |
| Notes: | Western Wisconsin |
The 31st Senate District of Wisconsin is one of 33 districts in the Wisconsin Senate.[1] Located in western Wisconsin, the district comprises all of Eau Claire County, southeast Dunn County, and parts of southern Chippewa County and northern Trempealeau County. It includes the cities of Eau Claire, Chippewa Falls, and Menomonie.[2]
Jeff Smith is the senator representing the 31st district. He was first elected in 2018 general election. He previously served in the Wisconsin State Assembly from 2007 through 2011.[3]
Each Wisconsin State Senate district is composed of three Wisconsin State Assembly districts. The 31st Senate district comprises the 91st, 92nd, and 93rd Assembly districts. The current representatives of those districts are:
The district is located almost entirely within Wisconsin's 3rd congressional district, which is represented by U.S. Representative Derrick Van Orden. The exception is one area of Chippewa County which falls within Wisconsin's 7th congressional district, represented by Tom Tiffany.[7]
Previous senators include:[8]
Note: the boundaries of districts have changed repeatedly over history. Previous politicians of a specific numbered district have represented a completely different geographic area, due to redistricting.
| Senator | Party | Notes | Session | Years | District Definition | |
|---|---|---|---|---|---|---|
| District created by 1861 Wisc. Act 216. | 1861 | La Crosse and Monroe counties | ||||
| align=left | Edwin Flint | Rep. | 15th | 1862 | ||
| Angus Cameron | Rep. | 16th | 1863 | |||
| 17th | 1864 | |||||
| John A. Chandler | 18th | 1865 | ||||
| 19th | 1866 | |||||
| Justin W. Ranney | 20th | 1867 | La Crosse and Vernon counties | |||
| Rep. | 21st | 1868 | ||||
| Cyrus M. Butt | Rep. | 22nd | 1869 | |||
| 23rd | 1870 | |||||
| Angus Cameron | Rep. | 24th | 1871 | |||
| 25th | 1872 | La Crosse County | ||||
| Gideon Hixon | Rep. | 26th | 1873 | |||
| 27th | 1874 | |||||
| Sylvester Nevins | Rep. | 28th | 1875 | |||
| 29th | 1876 | |||||
| Merrick Wing | Rep. | 30th | 1877 | |||
| 31st | 1878 | |||||
| Gysbert Van Steenwyk | Rep. | 32nd | 1879 | |||
| 33rd | 1880 | |||||
| Merrick Wing | Rep. | 34th | 1881 | |||
| 35th | 1882 | |||||
| Donald A. McDonald | Dem. | 36th | nowrap | 1883 - 1884 | ||
| 37th | nowrap | 1885 - 1886 | ||||
| Thomas A. Dyson | Rep. | 38th | nowrap | 1887 - 1888 | ||
| 39th | 1889 - 1890 | La Crosse and Vernon counties | ||||
| Henry Conner | Dem. | 40th | 1891 - 1892 | |||
| 41st | 1893 - 1894 | Jackson, Monroe, and Vernon counties | ||||
| James J. McGillivray | Rep. | 42nd | 1895 - 1896 | |||
| 43rd | 1897 - 1898 | Jackson, Juneau, and Monroe counties | ||||
| 44th | nowrap | 1899 - 1900 | ||||
| 45th | nowrap | 1901 - 1902 | ||||
| 46th | nowrap | 1903 - 1904 | ||||
| 47th | nowrap | 1905 - 1906 | ||||
| H. W. Barker | Rep. | 48th | nowrap | 1907 - 1908 | ||
| 49th | 1909 - 1910 | |||||
| Howard Teasdale | Rep. | 50th | 1911 - 1912 | |||
| 51st | nowrap | 1913 - 1914 | Jackson, Monroe, and Vernon counties | |||
| J. Henry Bennett | Rep. | 52nd | 1915 - 1916 | |||
| 53rd | nowrap | 1917 - 1918 | ||||
| 54th | nowrap | 1919 - 1920 | ||||
| 55th | nowrap | 1921 - 1922 | ||||
| Howard Teasdale | Rep. | 56th | 1923 - 1924 | Adams, Juneau, Monroe, and Marquette counties | ||
| 57th | 1925 - 1926 | |||||
| 58th | 1927 - 1928 | |||||
| 59th | 1929 - 1930 | |||||
| Orland S. Loomis | Rep. | 60th | 1931 - 1932 | |||
| 61st | 1933 - 1934 | |||||
| James Earl Leverich | Prog. | 62nd | nowrap | 1935 - 1936 | ||
| 63rd | nowrap | 1937 - 1938 | ||||
| Amrose B. Coller | Rep. | 64th | nowrap | 1939 - 1940 | ||
| 65th | nowrap | 1941 - 1942 | ||||
| James Earl Leverich | Prog. | 66th | nowrap | 1943 - 1944 | ||
| 67th | 1945 - 1946 | |||||
| Rep. | 68th | 1947 - 1948 | ||||
| 69th | 1949 - 1950 | |||||
| 70th | nowrap | 1951 - 1952 | ||||
| 71st | nowrap | 1953 - 1954 | ||||
| 72nd | nowrap | 1955 - 1956 | Adams, Juneau, Monroe, Marquette, and Vernon counties | |||
| 73rd | nowrap | 1957 - 1958 | ||||
| 74th | nowrap | 1959 - 1960 | ||||
| 75th | nowrap | 1961 - 1962 | ||||
| 76th | nowrap | 1963 - 1964 | ||||
| 77th | 1965 - 1966 | Eau Claire, Jackson, Monroe, and Trempealeau counties | ||||
| Raymond C. Johnson | Rep. | 78th | nowrap | 1967 - 1968 | ||
| 79th | nowrap | 1969 - 1970 | ||||
| 80th | 1971 - 1972 | |||||
| 81st | nowrap | 1973 - 1974 | Most of Clark County Most of Eau Claire County Most of Jackson County Most of Monroe County Northern Juneau County Northern Adams County Northern Jackson County Northern Trempealeau County Southwest Wood County Part of Waushara County | |||
| Thomas Harnisch | Dem. | 82nd | nowrap | 1975 - 1976 | ||
| 83rd | nowrap | 1977 - 1978 | ||||
| 84th | nowrap | 1979 - 1980 | ||||
| 85th | nowrap | 1981 - 1982 | ||||
| Rodney C. Moen | Dem. | 86th | nowrap | 1983 - 1984 | Buffalo, Jackson, Pepin, and Trempealeau counties Most of Eau Claire County Most of Monroe County | |
| 87th | nowrap | 1985 - 1986 | Buffalo, Jackson, Pepin, and Trempealeau counties Most of Eau Claire County Northern Monroe County Part of Clark County | |||
| 88th | nowrap | 1987 - 1988 | ||||
| 89th | nowrap | 1989 - 1990 | ||||
| 90th | nowrap | 1991 - 1992 | ||||
| 91st | 1993 - 1994 | Buffalo, Jackson, Pepin, and Trempealeau counties Most of Monroe County Parts of Eau Claire County | ||||
| 92nd | nowrap | 1995 - 1996 | ||||
| 93rd | nowrap | 1997 - 1998 | ||||
| 94th | nowrap | 1999 - 2000 | ||||
| 95th | nowrap | 2001 - 2002 | ||||
| Ron Brown | Rep. | 96th | nowrap | 2003 - 2004 | Buffalo, Jackson, Pepin, and Trempealeau counties Most of Eau Claire County Eastern Pierce County Northern Monroe County Southern Dunn County Part of Clark County | |
| 97th | nowrap | 2005 - 2006 | ||||
| Kathleen Vinehout | Dem. | 98th | nowrap | 2007 - 2008 | ||
| 99th | nowrap | 2009 - 2010 | ||||
| 100th | 2011 - 2012 | |||||
| 101st | nowrap | 2013 - 2014 | Buffalo and Pepin counties and Most of Pierce County Most of Trempealeau County Western Eau Claire County Southern Dunn County Western Jackson County | |||
| 102nd | nowrap | 2015 - 2016 | ||||
| 103rd | nowrap | 2017 - 2018 | ||||
| Jeff Smith | Dem. | 104th | nowrap | 2019 - 2020 | ||
| 105th | nowrap | 2021 - 2022 | ||||
| 106th | nowrap | 2023 - 2024 | Buffalo, Pepin, Trempealeau counties and most of Pierce County, southern Dunn County, western Eau Claire County, western Jackson County | |||