The following is a list of squads for each nation competing in the 2024 WBSC Premier12. Participating nations had to submit their final 28-man rosters no later than 10 October 2024. WBSC rules require teams to carry at least 13 pitchers and two catchers in their squads. If applicable, the club listed is the club a player was with at the start of the tournament.
====== Mexico announced their squad on 10 October 2024 and their final squad on 9 November 2024.
Manager: Benji Gil
Coaches: Alfredo Amézaga (third base), Javier Colina (bench), Jacob Cruz (hitting), Manny del Campo (bullpen), Jonathan Jones (first base), José Silva (pitching)
====== United States announced their squad on 21 October 2024.
Manager: 52 Mike Scioscia
Coaches: 32 LaTroy Hawkins (Bullpen), 16 Ron Roenicke (Bench), 19 Dave Wallace,(Pitching), 15 Dino Ebel (Third base), 4 Jemile Weeks (First base), 5 Rick Eckstein (Hitting)
====== Venezuela announced their squad on 18 October 2024.
Manager: Omar López
Coaches: Robinson Chirinos, Jorge Córdova, Néstor Corredor, Gerardo Parra, Luis RamÃÂrez, Wilfredo Romero
====== The Netherlands announced their squad on 21 October 2024.
Manager: 9 Evert-Jan 't Hoen
Coaches: 28 Randolph Oduber (First base), 24 Sidney de Jong (Bench), 44 Ben Thijssen (Third base), 36 Diegomar Markwell (Pitching), 8 Michael Duursma (First base), 32 Bart Hanegraaff
====== Panama announced their squad on 29 October 2024.
Manager: 17 José Mayorga
Coaches: 18 Dimas Ponce (First base), 12 Luis Caballero (Bench), 28 Cirilo Cumberbatch, 3 Rodrigo Vigil (Hitting) , 26 Ashley Ponce (Third base), 27 Gabriel Luckert (Pitching)
====== Puerto Rico announced their squad on 14 October 2024.
Manager: 19 Juan González
Coaches: 22 Eduardo Núñez (Third base), 41 Dicky González (Pitching), 42 Eddie González (First base), 14 Juan Carlos Montero (Bullpen), 35 Edgar Pérez (Infield), 66 Alex Cintrón (Bench)
====== Japan announced their squad on 9 October 2024.
Manager: Hirokazu Ibata
Coaches: Makoto Kaneko, Yoshinori Murata, Eishin Soyogi, Yoshiyuki Kamei, Kazuki Yoshimi
====== South Korea announced their squad on 8 November 2024.
Manager: Ryu Joong-il
Coaches: Pitching Choi Il-eon
====== Chinese Taipei (Taiwan) announced their squad on 12 October 2024.
Manager: Tseng Hao-ju
====== Cuba announced their squad on 4 November 2024.
Manager: Armando Johnson <br> Coaches: 24 José Elosegui (pitching), 9 Armando Ferrer (first base), 37 Humberto Guevara, 46 Orestes Kindelán (hitting), 99 Pedro Luis Lazo (pitching), 45 Juan Manrique, 11 Germán Mesa (bench), 39 Rafael Muñoz (third base)
====== Dominican Republic announced their squad on 6 November 2024.
Manager: César MartÃÂn
Coaches: Bench Danny Solano, Pitching Ervin Santana, Third base Ramón Santiago, First base Anderson Hernández, Hitting Ronny Paulino, Bullpen José Canó
====== Australia announced their squad on 9 October 2024.
Manager: Dave Nilsson
Coaches: Pitching Jim Bennett, Bullpen Graeme Lloyd, Hitting Chris Adamson, Josh Spence, Shayne Watson, Damian Shanahan, Will Bradley