James Troisi is an Australian professional football player who plays for Melbourne Victory in the A-League.

He signed his first professional contract with Newcastle United on 10 January 2007, keeping him at the club until June 2008. He did not make a first team appearance during his time at Newcastle. He joined Genclerbirligi S.K. at the end of August 2008 on a three-year contract. In July 2009, he joined Kayserispor on a four-year contract. On 22 August 2012 Juventus F.C. signed him as free agent on a four-year contract. but half of the registration rights was sold to Atalanta for €2 million as part of Manolo Gabbiadini's deal on 24 August 2012. On 24 September 2013, Troisi was loaned to Melbourne Victory on a one-year deal. On 20 June 2014, Juventus announced that they had secured full ownership of Troisi's contract from Atalanta for €1 million. On 30 August 2014, Troisi joined Belgian Pro League club Zulte Waregem on a one-year deal. On 31 August 2015 announce new contract with Ittihad FC of Saudi Arabia. On 29 January 2016, Troisi signed with Chinese Super League side Liaoning Whowin. On 1 August 2016, after his release from Liaoning Whowin, Troisi returned to the A-League again, signing a one-year deal with Melbourne Victory.

After a successful 2006–07 season with the Newcastle reserve side, Troisi made his debut for the Australia U23 team (the "Olyroos"), on 18 April 2007. Troisi made his full international debut for Australia in a goalless friendly against Singapore on 22 March 2008, playing in left midfield.