The 1919 Allan Cup was the senior amateur ice hockey championship of Canada for the 1918–1919 season, contested for the Allan Cup trophy. The Allan Cup, donated by Sir H. Montagu Allan in 1908, is awarded annually to the national champion of senior amateur ice hockey in Canada.
The 1919 competition marked the first post‑World War I tournament for the Cup. Teams representing various senior amateur clubs across Canada competed in a series of elimination rounds culminating in a final series to determine the national champion.
Detailed records of the participating teams, the format of the series, and the eventual champion for the 1919 Allan Cup are not readily available in the consulted encyclopedic sources. Consequently, specific information regarding the final matchup, scores, and champion of the 1919 tournament is currently Insufficient Encyclopedic Information.