John Uniac (born March 29, 1971) is a Canadian retired professional ice hockey defenceman. He was drafted by the Montreal Canadiens in the 11th round (228th overall) of the 1990 NHL Entry Draft. Uniac was selected first overall by the Sudbury Wolves in the 1987 Ontario Hockey League (OHL) Priority Selection and played major junior hockey in the OHL from 1987 to 1991 for the Sudbury Wolves and Kitchener Rangers.