# Michigan's 13th Senate district

Michigan's 13th Senate district is one of 38 districts in the Michigan Senate. The 13th 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 Rosemary Bayer since 2023, following her victory over Republican Jason Rhines.

## Geography

District 13 encompasses parts of Oakland and Wayne counties.

### 2011 Apportionment Plan

District 13, as dictated by the 2011 Apportionment Plan, covered eastern Oakland County in the northern suburbs of Detroit, including Troy, Rochester Hills, Royal Oak, Berkley, Clawson, Birmingham, Bloomfield Hills, and Rochester.
The district was split among Michigan's 8th, 9th, and 11th congressional districts, and overlapped with the 26th, 27th, 40th, 41st, and 45th districts of the Michigan House of Representatives.

## List of senators

| Senator | Party | Dates | Residence | Notes |
| Charles Dickey | Whig | 1853–1854 | Marshall | |
| Erastus Hussey | Republican | 1855–1856 | Battle Creek | |
| Nathan Pierce | Republican | 1857–1858 | Marengo | |
| Charles T. Gorham | Republican | 1859–1860 | Marshall | |
| George H. French | Republican | 1861–1864 | Homer | |
| Victory P. Collier | Republican | 1865–1866 | Battle Creek | |
| Cyrus G. Luce | Republican | 1867–1868 | Gilead | |
| John H. Jones | Republican | 1869–1870 | Quincy | |
| Caleb D. Randall | Republican | 1871–1872 | Coldwater | |
| David Anderson | Republican | 1873–1874 | Bear Lake Mills | |
| Albert Thompson | Republican | 1875–1876 | South Haven | |
| William Chamberlain | Republican | 1877–1880 | Three Oaks | |
| Thomas Mars | Republican | 1881–1882 | Berrien Center | |
| Henry F. Pennington | Democratic | 1883–1884 | Charlotte | |
| John Carveth | Republican | 1885–1886 | Middleville | |
| William A. Atwood | Republican | 1887–1888 | Flint | |
| William Ball | Republican | 1889–1890 | Hamburg | |
| John R. Benson | Patrons | 1891–1892 | Mount Morris | Also endorsed by the Democrats. |
| Jesse D. Crane | Republican | 1893–1894 | Fenton | |
| Ransom C. Johnson | Republican | 1895–1896 | Flint | |
| George W. Teeple | Republican | 1897–1898 | Pinckney | |
| Ira Terry Sayre | Republican | 1899–1900 | Flushing | |
| William S. Pierson | Republican | 1901–1902 | Flint | |
| George Barnes | Republican | 1903–1904 | Howell | |
| James F. Rumer | Republican | 1905–1906 | Davison | |
| Thomas J. Allen | Republican | 1907–1908 | Flint | |
| Francis J. Shields | Republican | 1909–1910 | Howell | |
| Leonard Freeman | Republican | 1911–1912 | Fenton | |
| Edwin J. Curts | Progressive | 1913–1914 | Flint | |
| George A. Barnes | Republican | 1915–1916 | Flint | |
| Hugh A. Stewart | Republican | 1917–1918 | Flint | |
| Claude M. Stoddard | Republican | 1919–1920 | Davison | |
| Henry T. Ross | Republican | 1921–1924 | Milford | |
| Warren J. Hinkley | Republican | 1925–1926 | Flushing | |
| Peter B. Lennon | Republican | 1927–1932 | Lennon | |
| William Palmer | Democratic | 1933–1937 | Flint | Resigned. |
| David M. Martin | Democratic | 1939–1940 | Flint | |
| Robert B. McLaughlin | Democratic | 1941–1944 | Flint | |
| Robert J. MacDonald | Democratic | 1945–1946 | Flint | |
| John A. Wright | Republican | 1947–1948 | Flint | |
| Garland B. Lane | Democratic | 1949–1964 | Flint | |
| Terry L. Troutt | Democratic | 1965–1966 | Romulus | |
| William Faust | Democratic | 1967–1982 | Westland | |
| Robert A. Welborn | Republican | 1983–1985 | Kalamazoo | Died in office. |
| Jack Welborn | Republican | 1985–1994 | Kalamazoo | |
| Mike Bouchard | Republican | 1995–1999 | Birmingham | Resigned after appointed Oakland County sheriff. |
| Shirley Johnson | Republican | 1999–2006 | Royal Oak | |
| John Pappageorge | Republican | 2007–2014 | Troy | |
| Marty Knollenberg | Republican | 2015–2018 | Troy | |
| Mallory McMorrow | Democratic | 2019–2022 | Royal Oak | |
| Rosemary Bayer | Democratic | 2023–present | Keego Harbor | |

## Recent election results
### 2018

2018 Michigan Senate election, District 13 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Mallory McMorrow | 73,146 | 51.9 |
| | Republican | Marty Knollenberg (incumbent) | 67,798 | 48.1 |
| Total votes | Total votes | Total votes | 140,944 | 100 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 2014

2014 Michigan Senate election, District 13 :
| Primary election |||||
| Party | Party | Candidate | Votes | % |
| | Republican | Marty Knollenberg | 8,788 | 36.2 |
| | Republican | Rocky Raczkowski | 8,716 | 35.9 |
| | Republican | Chuck Moss | 4,929 | 20.3 |
| | Republican | Ethan Baker | 1,546 | 6.4 |
| | Republican | Al Gui | 276 | 1.1 |
| Total votes | Total votes | Total votes | 24,255 | 100 |
| | Democratic | Cyndi Peltonen | 7,620 | 54.9 |
| | Democratic | Ryan Fishman | 6,252 | 45.1 |
| Total votes | Total votes | Total votes | 13,872 | 100 |
| General election |||||
| | Republican | Marty Knollenberg | 59,570 | 58.1 |
| | Democratic | Cyndi Peltonen | 42,892 | 41.9 |
| Total votes | Total votes | Total votes | 102,462 | 100 |
| | Republican hold | Republican hold | Republican hold | Republican hold |

### Federal and statewide results

| Year | Office | Results |
| 2020 | President | Biden 57.1 – 41.5% |
| 2018 | Senate | Stabenow 55.1 – 43.7% |
| 2018 | Governor | Whitmer 56.0 – 41.8% |
| 2016 | President | Clinton 50.4 – 44.4% |
| 2014 | Senate | Peters 52.1 – 44.3% |
| 2014 | Governor | Snyder 62.1 – 36.3% |
| 2012 | President | Romney 50.0 – 49.2% |
| 2012 | Senate | Stabenow 52.8 – 44.0% |

## Historical district boundaries

| Description | Apportionment Plan |
| Wayne County (part) Belleville Canton Township Dearborn Heights (part) Garden City Huron Township Inkster (part) Nankin Township Romulus Township Taylor Township (part) Van Buren Township Wayne | 1964 Apportionment Plan |
| Washtenaw County (part) Ypsilanti Township (part) Wayne County (part) Belleville Canton Township Garden City Romulus Township Sumpter Township Taylor (part) Van Buren Township Wayne Westland (part) | 1972 Apportionment Plan |
| Barry County Ionia County Kalamazoo County (part) Cooper Township Kalamazoo Kalamazoo Township (part) Richland Township Montcalm County | 1982 Apportionment Plan |
| Oakland County (part) Birmingham Bloomfield Hills Clawson Ferndale Hazel Park Huntington Woods Madison Heights Pleasant Ridge Royal Oak Troy | 1992 Apportionment Plan |
| Oakland County (part) Berkley Birmingham Bloomfield Hills Bloomfield Township Clawson Madison Heights Royal Oak Troy | 2001 Apportionment Plan |
| Oakland County (part) Berkley Birmingham Bloomfield Hills Clawson Rochester Rochester Hills Royal Oak Troy | 2011 Apportionment Plan |