The 12th Senate district of Wisconsin is one of 33 districts in the Wisconsin Senate. Located in northern Wisconsin, the district comprises Florence, Forest, Langlade, Lincoln, Marinette, Oneida, and Vilas counties, and parts of northern Oconto County, northwest Shawano County, and northeast Marathon County. It contains the cities of Antigo, Eagle River, Marinette, Merrill, Peshtigo, Rhinelander, and Tomahawk.
Current elected officials Mary Felzkowski is the senator representing the 12th district. She was first elected in the 2020 general election. She previously served 8 years in the State Assembly.
Each Wisconsin State Senate district is composed of three Wisconsin State Assembly districts. The 12th Senate district comprises the 34th, 35th, and 36th Assembly districts. The current representatives of those districts are:District Map Assembly District 34: Rob Swearingen (R–Rhinelander) Assembly District 35: Calvin Callahan (R–Tomahawk) Assembly District 36: Jeffrey Mursau (R–Crivitz)
The 12th Senate district is split between two congressional districts. The portion of the district in Florence, Forest, Langlade, Oneida, Vilas, Lincoln, and Marathon counties falls within the Wisconsin's 7th congressional district, which is represented by U.S. Representative Tom Tiffany; the remainder of the district, which falls within Marinette, Oconto, Menominee, and Shawano counties, is in Wisconsin's 8th congressional district, which is represented by U.S. Representative Mike Gallagher.
Past senators Past senators include:Wisconsin Blue Book, 1991-92 edition, Statistics: History, pages 657-666.
Note: the boundaries of the district has changed repeatedly over history. Previous politicians of this district have represented a completely different geographic area, due to redistricting. The district definitions for the given era are specified in the "District definition" column.
Senator Party Notes Session Years District Definition --District created-- 1848 Jefferson County Myron B. Williams Dem. 1st 2nd 1849 Peter H. Turner Dem. 3rd 1850 4th 1851 Alva Stewart Whig Transitioned to 14th district 5th 1852 Eleazer Wakeley Dem. 6th 1853 Walworth County 7th 1854 8th 1855 Jesse C. Mills Rep. 9th 1856 10th 1857 John W. Boyd Rep. 11th 1858 12th 1859 Oscar F. Bartlett Rep. 13th 1860 14th 1861 Wyman Spooner Rep. 15th 1862 16th 1863 Newton Littlejohn 17th 1864 18th 1865 19th 1866 20th 1867 Rep. 21st 1868 22nd 1869 Samuel Pratt Rep. 23rd 1870 24th 1871 Orrin Bacon Rep. 25th 1872 Green County 26th 1873 Harvey T. Moore Ref. 27th 1874 28th 1875 Joseph B. Treat Rep. 29th 1876 30th 1877 Green and Lafayette counties 31st 1878 32nd 1879 John W. Blackstone Jr. Rep. 33rd 1880 34th 1881 Archibald N. Randall Rep. 35th 1882 36th 1883–1884 James Waddington Rep. 37th 1885–1886 38th 1887–1888 Phineas Clawson Rep. 39th 1889–1890 40th 1891–1892 Neal Brown Dem. 41st 1893–1894 Marathon and Wood counties 42nd 1895–1896 Clarence A. Lamoreux Rep. 43rd 1897–1898 Ashland, Barron, Bayfield, Iron, Sawyer, Washburn counties 44th 1899–1900 William O'Neil Rep. 45th 1901–1902 46th 1903–1904 Ashland, Bayfield, Price, Sawyer, Taylor, Washburn counties Albert W. Sanborn Rep. 47th 1905–1906 48th 1907–1908 49th 1909–1910 50th 1911–1912 A. Pearce Tomkins Rep. 51st 1913–1914 Ashland, Bayfield, Sawyer, Rusk, Price counties 52nd 1915–1916 A. H. Wilkinson Rep. 53rd 1917–1918 54th 1919–1920 Chester H. Werden Rep. 55th 1921–1922 56th 1923–1924 Ashland, Iron, Price, Rusk, Sawyer, Vilas counties James H. Carroll Rep. 57th 1925–1926 58th 1927–1928 59th 1929–1930 60th 1931–1932 Bernard J. Gehrmann Rep. Elected to U.S. House in 1934 61st 1933–1934 Joseph E. McDermid Prog. Won 1935 special election. 62nd 1935–1936 63rd 1937–1938 64th 1939–1940 James H. Carroll Rep. 65th 1941–1942 66th 1943–1944 Ernest A. Heden Rep. 67th 1945–1946 68th 1947–1948 Clayton Hicks Rep. 69th 1949–1950 70th 1951–1952 Paul J. Rogan Rep. Resigned 71st 1953–1954 Bernard J. Gehrmann Rep. Won 1954 special election 72nd 1955–1956 Iron, Lincoln, Oneida, Price, Taylor, Vilas counties Clifford Krueger Rep. Resigned 1982. 73rd 1957–1958 74th 1959–1960 75th 1961–1962 76th 1963–1964 77th 1965–1966 Clark, Forest, Lincoln, Oneida, Taylor, Vilas counties 78th 1967–1968 79th 1969–1970 80th 1971–1972 81st 1973–1974 Florence, Forest, Lincoln, Oneida, Rusk, Taylor, Vilas & 82nd 1975–1976 83rd 1977–1978 84th 1979–1980 85th 1981–1982 --Vacant-- 86th 1983–1984 Florence, Forest, Langlade, Lincoln, Menominee, Oneida, Vilas & Lloyd H. Kincaid Dem. Won 1983 special election. 87th 1985–1986 Florence, Forest, Langlade, Lincoln, Menominee, Oneida, Vilas & 88th 1987–1988 89th 1989–1990 --Vacant-- Roger Breske Dem. Won 1990 special election. 90th 1991–1992 91st 1993–1994 Florence, Forest, Langlade, Lincoln, Menominee, Oneida, Vilas & 92nd 1995–1996 93rd 1997–1998 94th 1999–2000 95th 2001–2002 96th 2003–2004 Florence, Forest, Langlade, Lincoln, Menominee, Oneida, Vilas & 97th 2005–2006 98th 2007–2008 Jim Holperin Dem. 99th 2009–2010 100th 2011–2012 Tom Tiffany Rep. Elected to U.S. House in 2020. 101st 2013–2014 Florence, Forest, Langlade, Lincoln, Menominee, Oneida & 102nd 2015–2016 103rd 2017–2018 104th 2019–2020 --Vacant-- Mary Felzkowski Rep. 105th 2021–2022 106th 2023–2024 Florence, Forest, Langlade, Lincoln, Menominee, Oneida &part Marathon County,northern Marinette County,northern Oconto County,part of Shawano County,& most of Vilas County 107th 2025–2026
References
External links Senate District 12 at Wisconsin Legislature Senator Mary Felzkowski (2023) Senator Mary Felzkowski (2021) Senator Thomas Tiffany (2019) Senator Thomas Tiffany (2017)