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.
Head coach: Carlos Quirós
Head coach: 
Paulo Ricardo Kaká
Head coach: 
Yevhen Ryvkin
Head coach: Freddy González
Head coach: Gehad El-Sayed
Head coach: Estuardo De León
Head coach: Sergei Skorovich
Head coach: Bakhodir Akhmedov
Head coach: Hicham Dguig
Head coach: Jorge Braz
Head coach: Vinicius Leite de Carvalho
Head coach: Rakphol Sainetngam
Head coach: Marquinhos Xavier
Head coach: Tomáš Neumann
Head coach: 
José Manuel Botana
Head coach: Phạm Minh Giang
Head coach: Rui Sampaio
Head coach: Bruno García
The final squad was announced on 25 August 2021.[1] [2]
Head coach: Carlos Chilavert
Head coach: Fede Vidal
Head coach: Matías Lucuix
Head coach: Mohammad Nazemasharieh
Head coach: Dejan Maješ
Head coach: 
Dušan Jakica
The final squad was announced on 1 September 2021.[3]