Heinz Poenn (September 11, 1934 – October 23, 2016) was a Canadian slalom canoeist who competed in the early 1970s. He finished 35th in the K-1 event at the 1972 Summer Olympics in Munich. Poenn was born in Fürth, Germany and emigrated to Canada in 1957. He was a long-time resident of Holland Landing, Ontario and owned a stainless steel manufacturing company in nearby Vaughan. Poenn also worked to establish the Minden White Water Preserve in Ontario, which was used to host events at the 2015 Pan American Games. Poenn died on October 23, 2016, in Little Current, Ontario.