The 2025 Men's Six Nations Championship (known as the Guinness Men's Six Nations for sponsorship reasons and branded as M6N) is a rugby union competition, taking place between January and March 2025, featuring the men's national teams of England, France, Ireland, Italy, Scotland and Wales.

[1] Ireland entered the tournament as two-time reigning champions.

France returned to their normal home venue, the Stade de France in Saint-Denis, after a year away while the stadium was being prepared for the 2024 Summer Olympics.

Notes Table ranking rules[10] Player of the Match: Grégory Alldritt (France)[12] Assistant referees: Andrea Piardi (Italy) Jordan Way (Australia) Television match official: Brett Cronan (Australia) Foul play review officer: Damon Murphy (Australia) Notes: Player of the Match: Huw Jones (Scotland)[18] Assistant referees: Luke Pearce (England) Damian Schneider (Argentina) Television match official: Marius Jonker (South Africa) Foul play review officer: Marius van der Westhuizen (South Africa) Notes: Player of the Match: Jamison Gibson-Park (Ireland)[21] Assistant referees: James Doleman (New Zealand) Hollie Davidson (Scotland) Television match official: Glenn Newman (New Zealand) Foul play review officer: Richard Kelly (New Zealand) Notes: Player of the Match: Lorenzo Cannone (Italy)[24] Assistant referees: Paul Williams (New Zealand) Sam Grove-White (Scotland) Television match official: Eric Gauzins (France) Foul play review officer: Glenn Newman (New Zealand) Notes: Player of the Match: Fin Smith (England)[29] Assistant referees: Andrea Piardi (Italy) Damian Schneider (Argentina) Television match official: Marius van der Westhuizen (South Africa) Foul play review officer: Marius Jonker (South Africa) Notes: Player of the Match: Sam Prendergast (Ireland)[31] Assistant referees: Ben O'Keeffe (New Zealand) Luc Ramos (France) Television match official: Richard Kelly (New Zealand) Foul play review officer: Andrew Jackson (England) Notes: Assistant referees: Nika Amashukeli (Georgia) Gianluca Gnecchi (Italy) Television match official: Ian Tempest (England) Foul play review officer: Matteo Liperini (Italy) Assistant referees: Andrew Brace (Ireland) Luc Ramos (France) Television match official: Tual Trainini (France) Foul play review officer: Quinton Immelman (South Africa) Assistant referees: Craig Evans (Wales) Eoghan Cross (Ireland) Television match official: Ben Whitehouse (Wales) Foul play review officer: Mike Adamson (Scotland) Assistant referees: Matthew Carley (England) Christophe Ridley (England) Television match official: Ian Tempest (England) Foul play review officer: Andrew Jackson (England) Assistant referees: Nic Berry (Australia) Gianluca Gnecchi (Italy) Television match official: Eric Gauzins (France) Foul play review officer: Tual Trainini (France) Assistant referees: Craig Evans (Wales) Luc Ramos (France) Television match official: Marius Jonker (South Africa) Foul play review officer: Mike Adamson (Scotland) Assistant referees: Angus Gardner (Australia) Morné Ferreira (South Africa) Television match official: Andrew Jackson (England) Foul play review officer: Tual Trainini (France) Assistant referees: Nika Amashukeli (Georgia) Hollie Davidson (Scotland) Television match official: Mike Adamson (Scotland) Foul play review officer: Eric Gauzins (France) Assistant referees: Karl Dickson (England) Eoghan Cross (Ireland) Television match official: Marius van der Westhuizen (South Africa) Foul play review officer: Ian Tempest (England)

Note: The cited player's team is listed in bold italics.