Jonathan Duncan (born 16 May 1982 in Lae, Papua New Guinea) is a swimmer from New Zealand, who competed at the 2000 Summer Olympics in Sydney, in the 200, 400 and 1500m freestyle.

Duncan then went on to complete a bachelor of business degree at Massey University in Auckland in 2004.

During this time the Academy Cinema in Dunedin, New Zealand was established with business partner Jeffrey Broughton.

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