The 1984–85 WHL season was the 19th season of the Western Hockey League (WHL), featuring fourteen teams and a 72-game regular season. In their third season since joining the WHL, the Prince Albert Raiders put together a dominant run, winning 58 games and the Scotty Munro Memorial Trophy for best regular season record. In the playoffs, the Raiders won the President's Cup, defeating the Kamloops Blazers in the championship series. The Raiders thus earned a berth at the 1985 Memorial Cup tournament, where they won the Memorial Cup title.
This was the first season for the Moose Jaw Warriors, with the Winnipeg Warriors relocating to Moose Jaw prior to the season. This brought WHL hockey back to Moose Jaw for the first time since 1968, when the Moose Jaw Canucks left the league. In addition, the Kamloops Junior Oilers became a community-owned club and were renamed the Blazers.