The 2018–19 Montana Grizzlies basketball team represented the University of Montana during the 2018–19 NCAA Division I men's basketball season. The Grizzlies, led by fifth-year head coach Travis DeCuire, played their home games at Dahlberg Arena in Missoula, Montana as members of the Big Sky Conference. Finishing the season 26–9 overall, 16–4 in Big Sky play, the Grizzlies won the Big Sky regular season championship. As the No. 1 seed in the Big Sky tournament, they defeated Sacramento State, Weber State, and Eastern Washington to win the tournament, and earned the Big Sky's automatic bid to the NCAA tournament.