This district is located in the northwestern part of the state, bordering Michigan, Indiana, and Ontario, Canada (via Lake Erie), and includes all of Defiance, Williams, Fulton, Lucas, Ottawa, Sandusky, and Erie counties, and a portion of northern Wood County.

[3] The two parts of the district were connected only via the Thomas Edison Memorial Bridge between Erie and Ottawa counties, as well as Crane Creek State Park.

Some Ohio Democrats argued that when the beach floods, the district was not contiguous.

[4] It was one of several districts challenged in a 2018 lawsuit seeking to overturn Ohio's congressional map as unconstitutional gerrymandering.

[5] According to the lawsuit, the 9th "eats its way across the southern border of Lake Erie" while fragmenting Cleveland and Toledo.