This is the 1990-91 Manitoba Junior B Hockey League Season.
League Notes
League expands admitting Carberry Plainsmen & Red River Rockets.
Teams
- Oak Bluff Raiders
- Selkirk Fishermen
- North Winnipeg Satelites
- Beausejour Comets
- St. Boniface Saints (5th or 6th)
- St. Claude Knights (5th or 6th)
- North Interlake United
- Carberry Plainsmen
- Gimli Vikings
- Red River Rockets
listed in order of finish
Playoffs
- Quarter Finals
- Oak Bluff defeated Carberry
- Selkirk defeated North Interlake 3-games-to-1
- North Winnipeg defeated St. Boniface or St. Claude
- Beausejour defeated St. Boniface or St. Claude
- Semi Finals
- Beausejour defeated Oak Bluff 3-games-to-2
- North Winnipeg defeated Selkirk
- Carillon Cup Championship
- Beausejour defeated North Winnipeg 4-games-to-3
- Quarter Finals
Western Canadian Championship Tournament
- Keystone Cup Championship
- Beausejour failed to qualify for Metal Round
- Keystone Cup Championship