1977–78 Montana Grizzlies basketball team

The 1977–78 Montana Grizzlies basketball team represented the University of Montana during the 1977–78 NCAA Division I basketball season. Charter members of the Big Sky Conference, the Grizzlies were led by second-year head coach Jim Brandenburg and played their home games on campus at Adams Field House in Missoula, Montana.

They finished the regular season at 19–7, with a 12–2 record in conference to win the title and host the four-team Big Sky tournament. The Grizzlies defeated fourth-seed Boise State in the semifinal, then were upset by third-seed Weber State in the final in overtime. Montana had swept the season series with Weber.

The Grizzlies were led on the court by senior guard Micheal Ray Richardson, on the all-conference team for a third consecutive year; junior forward Allan Nielsen was on the second team. An honorable mention All-American, Richardson was the fourth overall selection of the 1978 NBA draft and a four-time NBA All-Star.

Postseason results
!colspan=6 style=| Big Sky tournament