[6][7] Assistant referees: Paul Williams (New Zealand) Hollie Davidson (Scotland) Television match official: Ben Whitehouse (Wales) Foul play review officer: Richard Kelly (New Zealand) Notes: Assistant referees: Nic Berry (Australia) Andrea Piardi (Italy) Television match official: Brett Cronan (Australia) Foul play review officer: Marius Jonker (South Africa) Notes: Assistant referees: Angus Gardner (Australia) Nic Berry (Australia) Television match official: Marius Jonker (South Africa) Foul play review officer: Brett Cronan (Australia) Notes: Assistant referees: Luke Pearce (England) Hollie Davidson (Scotland) Television match official: Richard Kelly (New Zealand) Foul play review officer: Ben Whitehouse (Wales) Notes: Assistant referees: Matthew Carley (England) Jordan Way (Australia) Television match official: Brian MacNeice (Ireland) Foul play review officer: Ian Tempest (England) Notes: Assistant referees: Ben O'Keeffe (New Zealand) Pierre Brousset (France) Television match official: Glenn Newman (New Zealand) Foul play review officer: Marius van der Westhuizen (South Africa) Notes: Assistant referees: Andrew Brace (Ireland) Jordan Way (Australia) Television match official: Ian Tempest (England) Foul play review officer: Brian MacNeice (Ireland) Notes: Assistant referees: Ben O'Keeffe (New Zealand) James Doleman (New Zealand) Television match official: Marius Jonker (South Africa) Foul play review officer: Marius van der Westhuizen (South Africa) Notes: Assistant referees: Nika Amashukeli (Georgia) Damian Schneider (Argentina) Television match official: Stuart Terheege (England) Foul play review officer: Eric Gauzins (France) Notes Assistant referees: Matthew Carley (England) Gianluca Gnecchi (Italy) Television match official: Ian Tempest (England) Foul play review officer: Ben Whitehouse (Wales) Notes Assistant referees: Karl Dickson (England) Damian Schneider (Argentina) Television match official: Eric Gauzins (France) Foul play review officer: Stuart Terheege (England) Notes: Assistant referees: James Doleman (New Zealand) Craig Evans (Wales) Television match official: Glenn Newman (New Zealand) Foul play review officer: Andrew Jackson (England) Notes:

Santiago Grondona, Guido Petti, Ignacio Calles and Pedro Delgado were added to the squad over the course of the championship.

[18] On 1 August, Australia named an initial 36-player squad for the opening two matches of the Rugby Championship.

On 15 September, Ethan de Groot was called back into the squad and Fletcher Newell was ruled out due to a calf injury.

On 23 July, South Africa named a 33-player squad for the opening two matches of the Rugby Championship.