Michigan's 12th Senate district


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.

Historical district boundaries

MapDescriptionApportionment PlanNotes

1964 Apportionment Plan
  • Wayne County
  • *Allen Park
  • *Dearborn Heights
  • *Inkster
  • *Southgate
  • *Taylor
    		• 1972 Apportionment Plan
  • Wayne County
  • *Belleville
  • *Flat Rock
  • *Huron Township
  • *Romulus
  • *Sumpter Township
  • *Taylor
  • *Van Buren Township
  • *Wayne
  • *Westland
    		• 1982 Apportionment Plan
  • Macomb County
  • *Armada Township
  • *Bruce Township
  • *Fraser
  • *Macomb Township
  • *Memphis
  • *Ray Township
  • *Richmond Township
  • *Shelby Township
  • *Sterling Heights
  • *Utica
  • *Washington Township
    		• 1992 Apportionment Plan
  • Oakland County
  • *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
    		• 2001 Apportionment Plan
  • Oakland County
  • *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