Josh Mantellato (born 21 April 1987) is a former Italy international rugby league footballer who most recently played on the wing for The Entrance Tigers in the Denton Engineering Cup. He previously played for the Wyong Roos in the Central Coast Division Rugby League competition, Newcastle Knights in the National Rugby League and Hull Kingston Rovers in the Super League.

Mantellato was born in Gosford, New South Wales, Australia and is of Italian descent.

He played his junior rugby league for the Wyong Roos.

Up until 2011, Mantellato played for the Wyong Roos in the Newcastle Rugby League.

In 2010, Mantellato made his international debut for Italy.

In 2012, Mantellato joined the Newcastle Knights' NSW Cup team, finishing the season as the competition's highest point-scorer, with 306 points. On 12 September 2012, he was named on the wing in the 2012 NSW Cup Team of the Year. He then signed a one-year contract with the Newcastle outfit.

In round 12 of the 2013 NRL season, Mantellato made his NRL debut for Newcastle against the South Sydney Rabbitohs. He scored a try and kicked three goals on debut. On 20 August 2013, he re-signed with the Novocastrians on a one-year contract. On 22 September 2013, he was again named on the wing in the 2013 NSW Cup Team of the Year. During 2013, he featured in Italy's successful 2013 Rugby League World Cup qualifying tournament and was selected in the 24-man squad for the World Cup campaign. On 19 October 2013, he kicked the winning field goal in Italy's 15-14 warm up game win over England.

On 21 September 2014, Mantellato was named on the wing in the 2014 NSW Cup Team of the Year for the third year in a row.