The 2019 Horizon League men's basketball tournament (also known as Motor City Madness) was the final event of the 2018–19 men's basketball season of the Horizon League. It began on March 5, 2019 and ended on March 12; first-round games were played at the home courts of the top four teams in regular-season league play, with all remaining games at Little Caesars Arena in Detroit. Northern Kentucky, which shared the regular-season conference title with Wright State, won the tournament and thus received the conference's automatic berth into the NCAA tournament.