The 2021 FIFA Futsal World Cup was an international futsal tournament to held in Lithuania from September 12 to October 3, 2021. The 24 national teams involved in the tournament were required by FIFA to register a squad of 16 players, including three goalkeepers. Despite this, each team can only use 14 players per match.
This article lists the national futsal squads that take part in the tournament. The age listed for each player is as of September 12, 2021, the first day of the tournament, and the names of the players shown are that of the FIFA Display Names listed on the official squad document issued by FIFA.