[23][24] Note: Ages, caps and clubs/franchises are of 19 August 2017 – the starting date of the tournament On 20 July 2017, Argentina named a 33-man squad for the Championship.

[25] 1 On 22 August, Felipe Arregui was added to the squad as injury cover for Nahuel Tetaz Chaparro who was injured in the opening round of the Championship.

[29] Jermaine Ainsley, Sam Carter, Pekahou Cowan, Sef Fa'agase, Richard Hardwick and Campbell Magnay missed out on the squad, while Karmichael Hunt, Tolu Latu, Eto Nabuli and Sefa Naivalu was omitted due to injury.

1 On 1 September, Tolu Latu was called up as cover for Stephen Moore, withdrew for personal reasons, ahead of the third-round game against South Africa.

[35] 2 On 13 August, Dane Coles was ruled out of the first round of the Rugby Championship and Ricky Riccitelli was called as cover.

[36] 3 On 20 August, Kane Hames, Akira Ioane and Atu Moli temporarily joined the squad ahead of the second round of the Championship.

[40] 6 On 10 September, Joe Moody was ruled out for the remaining matches in the Championship and Kane Hames was recalled as his replacement.

[41] 7 On 18 September, Matt Todd and Patrick Tuipulotu were added to the squad for the final two rounds, away to Argentina and South Africa.