Joel Riethmuller (born 9 May 1985) is an Italy international rugby league footballer who previously played professionally for the North Queensland Cowboys in the National Rugby League.

[2] He made his NRL debut against the Manly-Warringah Sea Eagles in round 14 of the 2011 season, at the age of 26, having broken into the Cowboys' first-grade squad after performing well in the Queensland Cup.

He signed a new two-year contract with the Townsville based outfit shortly after his debut.

[3] At the end of the 2011 season he made his international debut for Italy in a 96–8 win over Russia in Padova.

Riethmuller made 21 tackles in just 19 minutes on the field in his debut game.