This article lists the official squads for the 1991 Rugby World Cup that took place in England, Ireland, Scotland, Wales and France between 3 October and 2 November 1991.
All details, such as number of international caps and player age, are current as of the opening day of the tournament on 3 October 1991.
Head coaches: John Hart and Alex Wyllie Note: Flags indicate national union for the club/province as defined by World Rugby.
Head coaches: Luis Gradín / Guillermo Lamarca Note: Flags indicate national union for the club/province as defined by World Rugby.
Head coaches: Samisoni Viriviri and George Simpkin Note: Flags indicate national union for the club/province as defined by World Rugby.