Colby Fainga'a (born 31 March 1991) is an Australian professional rugby union player who plays for Lyon in the Top 14.

Fainga'a made his Super Rugby debut for the Brumbies in 2010 against the Chiefs in Canberra.

[1][2][3][4] On 7 August 2015, Fainga'a, along with Scott Fuglistaller were appointed co-captains of Melbourne Rising for the 2015 National Rugby Championship season.

[5] On 11 July 2018 Connacht announced the signing of Fainga'a, it was stated he would join up with the squad on the conclusion of the current Rebels Super Rugby season.

This biographical article relating to Australian rugby union is a stub.