The 2015 Rugby World Cup was an international rugby union tournament held in England and Wales from 18 September until 31 October 2015. 20 national teams competed, each bringing a squad of 31 players to the tournament. Each team had to submit their squad to World Rugby by 31 August 2015. A player could be replaced for medical or compassionate reasons, but would be unable to return to the squad. Any replacement players had an enforced stand-down period of 48 hours before they could take the field.[clarification needed]
Players marked (c) were the nominated captains for their teams. All details, such as number of international caps and player age, are as of the opening day of the tournament on 18 September 2015.