The district was first created during thereapportionment andredistricting after the1890 census. From 2003 to 2013, it was located in Detroit's inner suburbs to the north, along theInterstate 696 corridor inMacomb andOakland counties, and a portion of Macomb north of the corridor. District boundaries were redrawn in 1993 and 2003 due to reapportionment following the censuses of1990 and2000.[3] After Michigan's congressional map was redrawn in 2022, the 12th lost Ann Arbor and most of its suburbs and was re-centered around the cities ofDetroit andDearborn.[4]
For the118th and successive Congresses (based on redistricting following the2020 census), the district contains all or portions of the following counties and municipalities:[6]
Due to a mistake in how the name ofWilliam J. MacDonald appeared on the ballot inOntonagon County some votes were not included in the official count by the state board of canvassers, even though their inclusion in unofficial returns showed MacDonald had won. Subsequently, theUnited States House Committee on Elections unanimously reported a resolution to the full house awarding the seat to MacDonald.
^John Dingell was originally elected from the 15th district in 1955 via a special election, then redistricted to serve the 16th district from 1964 until its elimination in 2002. The 15th district itself would be dissolved in 2012 with Dingell as its last elected representative.
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