Ireland retained their title from the previous year, their 13th triumph in the competition.

[2] This was the first time that Ireland had retained their title outright since 1949, having shared the 1983 championship with France after winning in 1982.

[3] They were the first team to be awarded the redesigned Six Nations trophy introduced for 2015, which featured six sides as opposed to five.

[6] The 2015 Six Nations Championship commenced with a Friday night fixture, once again held at the Millennium Stadium in Cardiff, this time between Wales and England.

[7][8] Man of the Match: George Ford (England) Touch judges: Romain Poite (France) Mathieu Raynal (France) Television match official: Simon McDowell (Ireland) Notes: Man of the Match: Conor Murray (Ireland) Touch judges: Wayne Barnes (England) Stuart Berry (South Africa) Television match official: Graham Hughes (England) Notes: Man of the Match: Camille Lopez (France) Touch judges: Glen Jackson (New Zealand) Mike Fraser (New Zealand) Television match official: George Ayoub (Australia) Notes: Man of the Match: Jonathan Joseph (England) Touch judges: Pascal Gaüzère (France) Mike Fraser (New Zealand) Television match official: George Ayoub (Australia) Notes: Man of the Match: Johnny Sexton (Ireland) Touch judges: Nigel Owens (Wales) Stuart Berry (South Africa) Television match official: Graham Hughes (England) Man of the Match: Alun Wyn Jones (Wales) Touch judges: George Clancy (Ireland) Dudley Phillips (Ireland) Television match official: Simon McDowell (Ireland) Man of the Match: Luke McLean (Italy) Touch judges: Romain Poite (France) Leighton Hodges (Wales) Television match official: Graham Hughes (England) Notes: Man of the Match: Morgan Parra (France) Touch judges: JP Doyle (England) Marius Mitrea (Italy) Television match official: Simon McDowell (Ireland) Notes: Man of the Match: Robbie Henshaw (Ireland) Touch judges: Jérôme Garcès (France) Mathieu Raynal (France) Television match official: Deon van Blommestein (South Africa) Notes: Man of the Match: Sam Warburton (Wales) Touch judges: Jérôme Garcès (France)[nb 1] Federico Anselmi (Argentina) Television match official: Graham Hughes (England) Notes: Man of the Match: Ben Youngs (England) Touch judges: George Clancy (Ireland) Marius Mitrea (Italy) Television match official: Ben Skeen (New Zealand) Notes: Man of the Match: Thierry Dusautoir (France) Touch judges: Nigel Owens (Wales)[nb 1] Stuart Berry (South Africa) Television match official: Simon McDowell (Ireland) Notes: Man of the Match: Alun Wyn Jones (Wales) Touch judges: JP Doyle (England) Luke Pearce (England) Television match official: Simon McDowell (Ireland) Notes: Man of the Match: Seán O'Brien (Ireland) Touch judges: Pascal Gaüzère (France) Federico Anselmi (Argentina) Television match official: Graham Hughes (England) Notes: Man of the Match: Ben Youngs (England) Touch judges: John Lacey (Ireland) Leighton Hodges (Wales) Television match official: Ben Skeen (New Zealand) Notes: