Michigan's 12th Senate district is one of 38 districts in the Michigan Senate. The 12th district was created by the 1850 Michigan Constitution, as the 1835 constitution only permitted a maximum of eight senate districts. It has been represented by Democrat Kevin Hertel since 2023, succeeding fellow Democrat Rosemary Bayer.
Geography District 12 encompasses parts of Macomb, St. Clair, and Wayne counties.
2011 Apportionment Plan District 12, as dictated by the 2011 Apportionment Plan, covered much of central Oakland County in the northern suburbs of Detroit, including Pontiac, Southfield Township, Bloomfield Township, Auburn Hills, Keego Harbor, Orion Township, Oakland Township, Addison Township, Oxford Township, and Independence Township.
The district overlapped with Michigan's 8th, 9th, 11th, and 14th congressional districts, and with the 29th, 35th, 40th, 43rd, 45th, and 46th districts of the Michigan House of Representatives.
List of senators Senator Party Dates Residence Notes Moses A. McNaughton Free Soil 1853–1854 Jackson Austin Blair Republican 1855–1856 Jackson Joseph E. Beebe Republican 1857–1858 Jackson Ira C. Backus Republican 1859–1860 Jackson Charles V. DeLand Republican 1861–1862 Jackson Townsend E. Gidley Democratic 1863–1864 Parma Elected on a Fusionist ticket. Richard J. Crego Republican 1865–1866 Brooklyn George A. Smith Republican 1867–1868 Somerset Ezra L. Koon Republican 1869–1870 Hillsdale William R. Stoddard Republican 1871–1872 Litchfield Levi Sparks Republican 1873–1874 Buchanan Francis H. Berrick Democratic 1875–1876 Buchanan William O. Packard Republican 1877–1878 Covert James M. Shepard Republican 1879–1880 Cassopolis Henry Ford Republican 1881–1882 Lawton Charles J. Monroe Republican 1883–1886 South Haven John Holbrook Republican 1887–1890 Lansing Marcus Wilcox Democratic 1891–1892 Corunna Endorsed by both the Democrats and the Patrons of Industry.The Patrons of Industry were a farming organization founded in Port Huron, Michigan which, by 1890, had begun participating in political action independent of other political parties at the state level. Harvey Mellen Democratic 1893–1894 Romeo Fred M. Warner Republican 1895–1898 Farmington George B. Davis Republican 1899–1900 Utica Jerome W. Nims Republican 1901–1902 Romeo I. Roy Waterbury Republican 1903–1904 Highland Station Thaddeus D. Seeley Republican 1905–1908 Pontiac Frank T. Newton Republican 1909–1912 Ypsilanti James E. McGregor Democratic 1913–1914 Pontiac Frank L. Covert Republican 1915–1918 Pontiac George W. Millen Republican 1919–1920 Ann Arbor Charles A. Sink Republican 1921–1922 Ann Arbor Andrew B. Glaspie Republican 1923–1924 Oxford Elijah B. Howarth Jr. Republican 1925–1926 Royal Oak Charles A. Sink Republican 1927–1930 Ann Arbor James E. Lawson Republican 1931–1932 Royal Oak Andrew L. Moore Republican 1933–1935 Pontiac Died in office. George P. McCallum Republican 1937–1944 Ann Arbor George N. Higgins Republican 1945–1946 Ferndale Edgar F. Down Republican 1947–1948 Pleasant Ridge George N. Higgins Republican 1949–1954 Ferndale William Broomfield Republican 1955–1956 Royal Oak L. Harvey Lodge Republican 1957–1960 Waterford Township Farrell E. Roberts Republican 1961–1964 Pontiac Edward J. Robinson Democratic 1965–1966 Dearborn N. Lorraine Beebe Republican 1967–1970 Dearborn David Plawecki Democratic 1971–1982 Dearborn Heights William Faust Democratic 1983–1994 Westland Doug Carl Republican 1995–1997 Mount Clemens Died in office. David Jaye Republican 1997–2001 Utica Expelled. Alan Sanborn Republican 2001–2002 Richmond Mike Bishop Republican 2003–2010 Rochester Jim Marleau Republican 2011–2018 Lake Orion Rosemary Bayer Democratic 2019–2022 Beverly Hills Kevin Hertel Democratic 2023–present St. Clair Shores
Recent election results 2022
2018
2014
Federal and statewide results Year Office Results 2020 President Biden 52.2 – 46.3% 2018 Senate Stabenow 50.6 – 48.0% Governor Whitmer 52.0 – 45.7% 2016 President Trump 47.9 – 47.4% 2014 Senate Peters 50.1 – 46.5% Governor Snyder 60.5 – 37.9% 2012 President Romney 49.9 – 49.4% Senate Stabenow 52.7 – 44.2%
Historical district boundaries
Map Description Apportionment Plan Notes Wayne County (part) Dearborn (part) Dearborn Heights (part) Inkster (part) Redford Township 1964 Apportionment Plan Wayne County (part) Allen Park (part) Dearborn Heights Inkster Southgate Taylor (part) 1972 Apportionment Plan Wayne County (part) Belleville Flat Rock Huron Township Romulus Sumpter Township Taylor Van Buren Township Wayne Westland 1982 Apportionment Plan Macomb County (part) Armada Township Bruce Township Fraser Macomb Township Memphis Ray Township Richmond Township Shelby Township Sterling Heights Utica Washington Township 1992 Apportionment Plan Oakland County (part) Addison Township Auburn Hills Clarkston Independence Township Keego Harbor Lake Angelus Oakland Township Orion Township Oxford Township Pontiac Rochester Rochester Hills Sylvan Lake West Bloomfield Township (part) 2001 Apportionment Plan Oakland County (part) Addison Township Auburn Hills Bloomfield Township Clarkston Independence Township Keego Harbor Oakland Township Orion Township Oxford Township Pontiac Southfield Township Sylvan Lake 2011 Apportionment Plan
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