Matthew Duffie (born 16 August 1990) is a New Zealand professional rugby union footballer who currently plays for the Blues in Super Rugby. He previously played rugby league with the Melbourne Storm in the National Rugby League and was a part of their under-20s Premiership winning team in 2009, scoring 25 tries. On 1 May 2011, he was selected for the New Zealand Kiwis for the 2011 ANZAC Test.
Duffie attended Saint Kentigern College in Pakuranga, Auckland, New Zealand, where he was a part of the school's First XV, playing at fullback. He also excelled at athletics, making the national finals of the 200 m, 400 m and high jump. He graduated his final year in 2008.
In his younger years, he played for junior clubs the Kaiapoi Bulldogs and the Pakuranga Jaguars. He is the first Kaiapoi (now Northern) Bulldogs junior to be selected for the New Zealand Kiwis.