The 2015 Championship Game was the fifth in the Big Ten's 120-year history, and the second to feature the conference's East and West division alignment. Iowa made its first appearance in the conference championship game, while Michigan State made its third appearance (L in 2011, W in 2013). To date, this game holds the Big Ten Football Championship Game attendance record.
The Hawkeyes sat atop the Big Ten West division standings wire-to-wire. They opened conference play with a hard-nosed 10-6 victory over the Wisconsin Badgers in Madison, and overwhelmed the Northwestern Wildcats 40-10 in Evanston two weeks later. Iowa clinched the Big Ten West division by defeating the Purdue Boilermakers 40-20 in the home finale at Kinnick Stadium, and completed an unbeaten regular season by defeating the Nebraska Cornhuskers 28-20 in Lincoln.