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. 
Players marked (c) were named as captain for their national squad. 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.
Pool A.
England.
Head coach: Geoff Cooke
Italy.
Head coach: Bertrand Fourcade
New Zealand.
Head coaches: John Hart and Alex Wyllie
United States.
Head coach: Jim Perkins
Pool B.
Ireland.
Head coach: Ciaran Fitzgerald
Japan.
Head coach: Hiroaki Shukuzawa
Scotland.
Head coach: Ian McGeechan
Zimbabwe.
Trainer: Iain Buchanan
Pool C.
Argentina.
Head coaches: Luis Gradín / Guillermo Lamarca
Australia.
Head coach: Bob Dwyer
Wales.
Head coach: Alan Davies
Pool D.
Canada.
Head coach: Ian Birtwell
Fiji.
Head coaches: Samisoni Viriviri and George Simpkin
France.
Head coach: Daniel Dubroca
Romania.
Head coach: Peter Ianusevici
References.
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