The 2017 Horizon League men's basketball tournament (also known as Motor City Madness) was the conference tournament for the Horizon League. It was played from March 3 through March 7, 2017 at Joe Louis Arena in Detroit. Northern Kentucky defeated Milwaukee 59-53 in the championship game to win the tournament championship. As a result, Northern Kentucky received the conference's automatic berth into the 2017 NCAA Division I men's basketball tournament, the first for the Norse in their first season of Division I eligibility.
All 10 teams participated in the tournament. The top six teams receive a bye into the quarterfinals. This was a change from the previous season where the top two seeds received double byes into the semifinals. Teams were seeded by record within the conference, with a tiebreaker system to seed teams with identical conference records.