The 1966 Memorial Cup was the 48th annual Memorial Cup competition, organized by the Canadian Amateur Hockey Association (CAHA) to determine the champion of "junior A" ice hockey. The George Richardson Memorial Trophy champions Oshawa Generals of the Ontario Hockey Association in Eastern Canada competed against the Abbott Cup champions Edmonton Oil Kings of the Central Alberta Hockey League in Western Canada. Maple Leaf Gardens in Toronto, Ontario hosted the Final, which featured Bobby Orr, the Generals captain. It was the last of 18 Memorial Cup series to be played at the Gardens. In a best-of-seven series, Edmonton won their second Memorial Cup, defeating Oshawa four games to two. Orr was injured and played sparingly.