The J. Ross Robertson Cup is a Canadian ice hockey trophy. It is awarded annually in junior ice hockey to the champion of the Ontario Hockey League playoffs. It was donated by John Ross Robertson to the Ontario Hockey Association in 1910, and is the third of three similarly named trophies he established. His other eponymous trophies for the OHA include, the J. Ross Robertson Cup awarded to the annual champions of Allan Cup Hockey, and the J. Ross Robertson Cup which was awarded to the annual champions of the discontinued intermediate division.