Ralph Hopiavuori (born July 15, 1951) is a Canadian former professional ice hockey player who played in the World Hockey Association (WHA). Hopiavuori played parts of three WHA seasons with the Cleveland Crusaders and Indianapolis Racers. He was drafted in the third round of the 1971 NHL Amateur Draft by the Toronto Maple Leafs. Hopiavuori was born in Kirkland Lake, Ontario.