Michigan's 8th congressional district is a United States congressional district in Central Michigan. The district was first created in 1873, after redistricting following the 1870 census. From 2003 to 2013, it consisted of all of Clinton, Ingham, and Livingston counties, and included the southern portion of Shiawassee and the northern portion of Oakland counties. From 2013 to 2023, the district no longer covered Clinton or Shiawassee counties and instead covered more of Oakland County, including Rochester. In 2023, the district was redrawn to be centered on the city of Flint, and includes all of Saginaw and Bay counties, almost all of Genesee County, and portions of Midland and Tuscola counties.

Saginaw County, officially the County of Saginaw, is a county located in the U.S. state of Michigan. As of the 2020 Census, the population was 190,124. The county seat is Saginaw. The county was created by September 10, 1822, and was fully organized on February 9, 1835. The etymology of the county's name is uncertain. It may be derived from Sace-nong or Sak-e-nong, as the Sauk tribe is believed by some to have once lived there. A more likely possibility is that it comes from Ojibwe words meaning "place of the outlet" –sag and ong. See List of Michigan county name etymologies.