Skip links

Michigan Senate

Michigan Senate

(Loading map data.)

Michigan House / Michigan Senate

Click a district for more information.

2020 Update

All Michigan State Senate districts were on the ballot in 2018 and are not supposed to be on the ballot again until 2022. However, a redistricting case may lead to some Michigan State Senate districts being on the ballot in 2020.

2018 Election Update

After the 2016 election, Republicans controlled the Michigan State Senate 27-11. Heading into the 2018 election, Republicans controlled the chamber 27-10 with one vacancy. In the 2018 election, Democrats flipped five seats, cutting the Republican majority to 22-16.

EveryDistrict endorsed four of the five successful Democratic challengers: Rosemary Bayer (SD 12), Mallory McMorrow (SD 13), Sean McCann (SD 20), and Winnie Brinks (SD 29). Democrats also flipped SD 7.

EveryDistrict identified an additional six competitive districts and endorsed candidates in five of those districts: Henry Yanez (SD 10), Kelly Rossman-McKinney (SD 24), Phil Phelps (SD 32), Poppy Sias-Hernandez (SD 34), and Scott Dianda (SD 38).

Click here for a spreadsheet of LDI scores and 2018 Michigan election results; click here for all 2018 election results.

Understanding the Map

EveryDistrict’s Legislative District Index (LDI) ranks state legislative districts on a scale from 100 to -100, using statewide elections data. Districts with a score of 100 would vote for statewide Democratic candidates by an average of 100 points (with the Democratic candidate receiving 100% of the vote); districts with a score of -100 would vote for statewide Republican candidates by an average of 100 points (with the Republican candidate receiving 100% of the vote). For a more realistic example, a district with a score of 10 would vote for statewide Democratic candidates by an average of 10 points (meaning we would expect the Democratic state legislative candidate to win with 55% of the vote compared to the Republican winning 45% of the vote).

EveryDistrict divides winnable districts into five categories. Dark blue districts lean Democratic and are held by a Democratic legislator. Light blue districts lean Republican and are held by a Democratic legislator. Yellow districts lean Democratic but are held by a Republican legislator; these districts represent the best pick up opportunities for Democrats. Pink districts lean slightly Republican, with a range of 0 up to -5; in the current political climate we’ve identified these districts as pick up opportunities for Democrats. Dark red districts are held by a Republican and have an LDI score of less than -5.

For more information about EveryDistrict’s LDI, please click here.

Updated LDI scores incorporating the 2018 election results will be released in spring 2019.