The 2018 Horizon League men's basketball tournament (also known as Motor City Madness) was the postseason men's basketball tournament for the Horizon League of the 2017–18 NCAA Division I men's basketball season. It was held from March 2 through March 6, 2018 at Little Caesars Arena in Detroit. The tournament was won by No. 2 seed Wright State, who defeated No. 8 seed Cleveland State in the championship game, and received the conference's automatic berth into the NCAA tournament.