| No. | Pos | Full Name | Birth Date (Age) | Caps | Club | Country | ||
| BRAZIL (Group 1) | ||||||||
| Head coach: Flávio Costa | ||||||||
| - | FW | Adãozinho | 2 April 1923 (aged 27) | 2 | Internacional | Brazil | ||
| - | FW | Ademir | 8 November 1922 (aged 27) | 25 | Vasco da Gama | Brazil | ||
| - | FW | Alfredo | 1 January 1920 (aged 30) | 0 | Vasco da Gama | Brazil | ||
| - | DF | Augusto | 22 October 1920 (aged 29) | 12 | Vasco da Gama | Brazil | ||
| - | FW | Baltazar | 14 January 1926 (aged 24) | 4 | Corinthians | Brazil | ||
| - | GK | Barbosa | 27 March 1921 (aged 29) | 13 | Vasco da Gama | Brazil | ||
| - | MF | Bauer | 21 November 1925 (aged 24) | 6 | São Paulo FC | Brazil | ||
| - | MF | Bigode | 4 April 1922 (aged 28) | 5 | Flamengo | Brazil | ||
| - | GK | Castilho | 27 November 1927 (aged 22) | 2 | Fluminense | Brazil | ||
| - | FW | Chico | 7 January 1922 (aged 28) | 15 | Vasco da Gama | Brazil | ||
| - | MF | Danilo | 3 December 1920 (aged 29) | 15 | Vasco da Gama | Brazil | ||
| - | DF | Ely | 14 May 1921 (aged 29) | 8 | Vasco da Gama | Brazil | ||
| - | FW | Friaça | 20 October 1924 (aged 25) | 6 | São Paulo FC | Brazil | ||
| - | FW | Jair | 21 March 1921 (aged 29) | 32 | Palmeiras | Brazil | ||
| - | DF | Juvenal | 27 November 1923 (aged 26) | 4 | Flamengo | Brazil | ||
| - | FW | Maneca | 28 January 1926 (aged 24) | 3 | Vasco da Gama | Brazil | ||
| - | DF | Nena | 27 March 1921 (aged 29) | 5 | Internacional | Brazil | ||
| - | DF | Nílton Santos | 16 May 1927 (aged 23) | 5 | Botafogo | Brazil | ||
| - | MF | Noronha | 25 September 1918 (aged 31) | 15 | São Paulo FC | Brazil | ||
| - | FW | Rodrigues | 27 June 1925 (aged 24) | 2 | Fluminense | Brazil | ||
| - | MF | Rui | 2 August 1922 (aged 27) | 27 | São Paulo FC | Brazil | ||
| - | FW | Zizinho | 14 September 1922 (aged 27) | 30 | Bangu AC | Brazil | ||
| SWITZERLAND (Group 1) | ||||||||
| Head coach: Franco Andreoli | ||||||||
| - | FW | Charles Antenen | 3 November 1929 (aged 20) | FC La Chaux-de-Fonds | Switzerland | |||
| - | FW | René Bader | 7 August 1922 (aged 27) | FC Basel | Switzerland | |||
| - | FW | Walter Beerli | July 23, 1928 (aged 21) | Young Boys Bern | Switzerland | |||
| - | FW | Alfred Bickel | 2 May 1918 (aged 32) | Grasshoppers Club Zurich | Switzerland | |||
| - | DF | Roger Bocquet | 9 April 1921 (aged 29) | Lausanne-Sport | Switzerland | |||
| - | GK | Eugen Corrodi | 2 July 1922 (aged 27) | FC Lugano | Switzerland | |||
| - | MF | Oliver Eggimann | 6 August 1921 (aged 28) | Servette Genf | Switzerland | |||
| - | FW | Jacques Fatton | 19 December 1925 (aged 24) | Servette | Switzerland | |||
| - | FW | Hans-Peter Friedländer | 6 November 1920 (aged 29) | Lausanne-Sport | Switzerland | |||
| - | DF | Rudolf Gyger | 16 April 1920 (aged 30) | Cantonal Neuchâtel | Switzerland | |||
| - | GK | Adolphe Hug | 23 September 1923 (aged 26) | Urania Genf | Switzerland | |||
| - | DF | Willy Kernen | 6 August 1929 (aged 20) | FC La Chaux-de-Fonds | Switzerland | |||
| - | DF | Gerhard Lusenti | 24 April 1921 (aged 29) | AC Bellinzona | Switzerland | |||
| - | DF | André Neury | 3 September 1921 (aged 28) | Locarno | Switzerland | |||
| - | MF | Roger Quinche | 22 July 1922 (aged 27) | Young Boys Bern | Switzerland | |||
| - | DF | Kurt Rey | 1923 | SC YF Juventus | Switzerland | |||
| - | FW | Walter Schneiter | FC Zurich | Switzerland | ||||
| - | FW | Hans Siegenthaler | 1923 | SC YF Juventus | Switzerland | |||
| - | DF | Felice Soldini | 1915 | AC Bellinzona | Switzerland | |||
| - | DF | Willi Steffen | 24 May 1923 (aged 27) | Cantonal Neuchâtel | Switzerland | |||
| - | GK | Georges Stuber | 11 May 1925 (aged 25) | Lausanne-Sport | Switzerland | |||
| - | FW | Jean Tamini | 9 December 1919 (aged 30) | Servette Genf | Switzerland | |||
| YUGOSLAVIA (Group 1) | ||||||||
| Head coach: Milorad Arsenijević | ||||||||
| - | MF | Aleksandar Atanacković | 29 April 1920 (aged 30) | 15 | Partizan Belgrade | Yugoslavia | ||
| - | GK | Vladimir Beara | 2 November 1928 (aged 21) | 0 | Hajduk Split | Yugoslavia | ||
| - | FW | Stjepan Bobek | 3 December 1923 (aged 26) | 26 | Partizan Belgrade | Yugoslavia | ||
| - | DF | Božo Broketa | 24 December 1921 (aged 28) | 3 | Hajduk Split | Yugoslavia | ||
| - | FW | Željko Čajkovski | 5 May 1925 (aged 25) | 16 | Dinamo Zagreb | Yugoslavia | ||
| - | MF | Zlatko Čajkovski | 24 January 1923 (aged 27) | 25 | Partizan Belgrade | Yugoslavia | ||
| - | DF | Ratko Čolić | 17 March 1918 (aged 32) | 6 | Partizan Belgrade | Yugoslavia | ||
| - | MF | Predrag Đajić | 1 May 1922 (aged 28) | 5 | Red Star Belgrade | Yugoslavia | ||
| - | DF | Vladimir Firm | 1923 | 3 | Partizan Belgrade | Yugoslavia | ||
| - | DF | Ivan Horvat | 16 July 1926 (aged 23) | 13 | Dinamo Zagreb | Yugoslavia | ||
| - | DF | Miodrag Jovanović | 17 January 1922 (aged 28) | 18 | Partizan Belgrade | Yugoslavia | ||
| - | MF | Ervin Katnić | Hajduk Split | Yugoslavia | ||||
| - | FW | Prvoslav Mihajlović | 13 April 1921 (aged 29) | 12 | Partizan Belgrade | Yugoslavia | ||
| - | FW | Rajko Mitić | 6 September 1922 (aged 27) | 19 | Red Star Belgrade | Yugoslavia | ||
| - | GK | Srđan Mrkušić | 26 June 1915 (aged 34) | 4 | Red Star Belgrade | Yugoslavia | ||
| - | FW | Tihomir Ognjanov | 2 March 1927 (aged 23) | 2 | Red Star Belgrade | Yugoslavia | ||
| - | MF | Bela Palfi | 16 February 1923 (aged 27) | 1 | Red Star Belgrade | Yugoslavia | ||
| - | MF | Ivo Radovniković | Hajduk Split | Yugoslavia | ||||
| - | DF | Branko Stanković | 31 October 1921 (aged 28) | 19 | Red Star Belgrade | Yugoslavia | ||
| - | FW | Kosta Tomašević | 26 May 1924 (aged 26) | 6 | Red Star Belgrade | Yugoslavia | ||
| - | FW | Bernard Vukas | 1 May 1927 (aged 23) | 6 | Hajduk Split | Yugoslavia | ||
| - | DF | Siniša Zlatković | Red Star Belgrade | Yugoslavia | ||||
| MEXICO (Group 1) | ||||||||
| Head coach: Octavio Vial | ||||||||
| - | FW | José Luis Borbolla | 31 January 1920 (aged 30) | Club América | Mexico | |||
| - | GK | Antonio Carbajal | 7 June 1929 (aged 21) | España FC | Mexico | |||
| - | FW | Horacio Casarín | 25 May 1918 (aged 32) | España FC | Mexico | |||
| - | GK | Raúl Córdoba | San Sebastian Leon | Mexico | ||||
| - | MF | Samuel Cuburu | 20 February 1928 (aged 22) | FC Puebla | Mexico | |||
| - | MF | Antonio Flores | 13 July 1923 (aged 26) | Atlas | Mexico | |||
| - | DF | Gregorio Gómez | 26 June 1924 (aged 25) | Deportivo Guadalajara | Mexico | |||
| - | MF | Carlos Guevara | Asturias F.C. | Mexico | ||||
| - | DF | Manuel Gutiérrez | 8 April 1920 (aged 30) | Club América | Mexico | |||
| - | MF | Francisco Hernández | CD Zacatepec | Mexico | ||||
| - | DF | Alfonso Montemayor | 28 April 1922 (aged 28) | FC Leon | Mexico | |||
| - | FW | José Naranjo | 19 March 1926 (aged 24) | Oro Guadalajara | Mexico | |||
| - | FW | Leonardo Navarro | FC Atlante | Mexico | ||||
| - | MF | Mario Ochoa | 1927 | Club América | Mexico | |||
| - | MF | Héctor Ortíz | 20 December 1928 (aged 21) | Marte | Mexico | |||
| - | MF | Mario Pérez | 19 February 1927 (aged 23) | Marte | Mexico | |||
| - | FW | Max Prieto | Deportivo Guadalajara | Mexico | ||||
| - | DF | José Antonio Roca | 24 May 1928 (aged 22) | Necaxa | Mexico | |||
| - | DF | Rodrígo Ruíz | 14 April 1923 (aged 27) | Deportivo Guadalajara | Mexico | |||
| - | FW | Carlos Septién | 18 January 1923 (aged 27) | España FC | Mexico | |||
| - | FW | Guadelupe Velázquez | 12 August 1923 (aged 26) | FC Puebla | Mexico | |||
| - | DF | Felipe Zetter | 3 July 1923 (aged 26) | Atlas | Mexico | |||
| SPAIN (Group 2) | ||||||||
| Head coach: Guillermo Eizaguirre | ||||||||
| - | GK | Juan Acuña | 11 January 1923 (aged 27) | 1 | Deportivo de La Coruña | Spain | ||
| - | DF | Gabriel Alonso | 9 November 1923 (aged 26) | 4 | Celta de Vigo | Spain | ||
| - | DF | Francisco Antúnez | 1 November 1922 (aged 27) | 2 | CF Sevilla | Spain | ||
| - | DF | Vicente Asensi | 28 January 1919 (aged 31) | 5 | Valencia CF | Spain | ||
| - | FW | Estanislao Basora | 18 November 1926 (aged 23) | 4 | CF Barcelona | Spain | ||
| - | FW | César | 29 June 1920 (aged 29) | 8 | CF Barcelona | Spain | ||
| - | FW | Agustín Gaínza | 28 May 1922 (aged 28) | 14 | Atlético Bilbao | Spain | ||
| - | DF | Josep Gonzalvo | 16 January 1920 (aged 30) | 3 | CF Barcelona | Spain | ||
| - | MF | Marià Gonzalvo | 22 March 1922 (aged 28) | 8 | CF Barcelona | Spain | ||
| - | FW | Rosendo Hernández | 1 March 1921 (aged 29) | 2 | RCD Espanyol | Spain | ||
| - | FW | Silvestre Igoa | 5 September 1920 (aged 29) | 5 | Valencia CF | Spain | ||
| - | GK | Ignacio Eizaguirre | 7 November 1920 (aged 29) | 14 | Valencia CF | Spain | ||
| - | FW | José Juncosa | 2 February 1922 (aged 28) | 1 | Atlético Madrid | Spain | ||
| - | DF | Rafael Lesmes | 9 November 1926 (aged 23) | 0 | Valladolid | Spain | ||
| - | FW | Luis Molowny | 12 May 1925 (aged 25) | 2 | Real Madrid | Spain | ||
| - | MF | Nando | 1 February 1921 (aged 29) | 5 | Atlético Bilbao | Spain | ||
| - | FW | José Luis Panizo | 12 January 1922 (aged 28) | 6 | Atlético Bilbao | Spain | ||
| - | DF | José Parra | 28 August 1925 (aged 24) | 1 | RCD Espanyol | Spain | ||
| - | MF | Antonio Puchades | 4 June 1925 (aged 25) | 6 | Valencia CF | Spain | ||
| - | GK | Antoni Ramallets | 4 June 1924 (aged 26) | 0 | CF Barcelona | Spain | ||
| - | DF | Alfonso Silva | 19 March 1926 (aged 24) | 3 | Atlético Madrid | Spain | ||
| - | FW | Zarra | 20 January 1921 (aged 29) | 11 | Atlético Bilbao | Spain | ||
| ENGLAND (Group 2) | ||||||||
| Head coach: Walter Winterbottom | ||||||||
| - | DF | John Aston | 2 September 1921 (aged 28) | 14 | Manchester United | England | ||
| - | MF | Eddie Baily | 6 August 1925 (aged 24) | 0 | Tottenham Hotspur | England | ||
| - | FW | Roy Bentley | 17 May 1924 (aged 26) | 4 | Chelsea | England | ||
| - | MF | Henry Cockburn | 14 September 1921 (aged 28) | 10 | Manchester United | England | ||
| - | MF | Jimmy Dickinson | 24 April 1925 (aged 25) | 7 | Portsmouth | England | ||
| - | GK | Ted Ditchburn | 24 October 1921 (aged 28) | 2 | Tottenham Hotspur | England | ||
| - | DF | Bill Eckersley | 16 July 1925 (aged 24) | 0 | Blackburn Rovers | England | ||
| - | FW | Tom Finney | 5 April 1922 (aged 28) | 25 | Preston North End | England | ||
| - | MF | Laurie Hughes | 2 March 1924 (aged 26) | 0 | Liverpool | England | ||
| - | FW | Wilf Mannion | 16 May 1918 (aged 32) | 19 | Middlesbrough | England | ||
| - | FW | Stanley Matthews | 1 February 1915 (aged 35) | 30 | Blackpool | England | ||
| - | FW | Jackie Milburn | 11 May 1924 (aged 26) | 7 | Newcastle United | England | ||
| - | FW | Stan Mortensen | 26 May 1921 (aged 29) | 18 | Blackpool | England | ||
| - | FW | Jimmy Mullen | 6 January 1923 (aged 27) | 4 | Wolverhampton Wanderers | England | ||
| - | MF | Bill Nicholson | 26 January 1919 (aged 31) | 0 | Tottenham Hotspur | England | ||
| - | DF | Alf Ramsey | 22 January 1920 (aged 30) | 5 | Tottenham Hotspur | England | ||
| - | DF | Laurie Scott | 23 April 1917 (aged 33) | 17 | Arsenal | England | ||
| - | DF | Jim Taylor | 5 November 1917 (aged 32) | 0 | Fulham | England | ||
| - | MF | Willie Watson | 7 March 1920 (aged 30) | 2 | Sunderland | England | ||
| - | GK | Bert Williams | 31 January 1920 (aged 30) | 7 | Wolverhampton Wanderers | England | ||
| - | DF | Billy Wright | 6 February 1924 (aged 26) | 29 | Wolverhampton Wanderers | England | ||
| CHILE (Group 2) | ||||||||
| Head coach: José Tapia | ||||||||
| - | DF | Manuel Álvarez | 23 May 1928 (aged 22) | 3 | Club Deportivo Universidad Católica | Chile | ||
| - | MF | Miguel Busquet | 15 October 1920 (aged 29) | 15 | CF Universidad de Chile | Chile | ||
| - | MF | Fernando Campos | 5 | Colo-Colo | Chile | |||
| - | MF | Hernán Carvallo | 19 August 1922 (aged 27) | 5 | Club Deportivo Universidad Católica | Chile | ||
| - | FW | Atilio Cremaschi | 8 March 1923 (aged 27) | 10 | Unión Española | Chile | ||
| - | FW | Guillermo Díaz | 29 December 1930 (aged 19) | 4 | Club de Deportes Santiago Wanderers | Chile | ||
| - | DF | Arturo Farías | 1 November 1927 (aged 22) | 4 | Colo-Colo | Chile | ||
| - | DF | Miguel Flores | 0 | CF Universidad de Chile | Chile | |||
| - | FW | Carlos Ibáñez | 30 November 1931 (aged 18) | 0 | Magallanes | Chile | ||
| - | FW | Raymundo Infante | 13 | Club Deportivo Universidad Católica | Chile | |||
| - | GK | Sergio Livingstone | 26 March 1920 (aged 30) | 31 | Club Deportivo Universidad Católica | Chile | ||
| - | DF | Manuel Machuca | 1934 | 18 | Colo-Colo | Chile | ||
| - | FW | Luis Mayanés | 15 January 1925 (aged 25) | 0 | CF Universidad de Chile | Chile | ||
| - | FW | Manuel Muñoz | 0 | Colo-Colo | Chile | |||
| - | FW | Andrés Prieto | 19 December 1928 (aged 21) | 9 | Club Deportivo Universidad Católica | Chile | ||
| - | GK | René Quitral | 0 | Club de Deportes Santiago Wanderers | Chile | |||
| - | FW | Fernando Riera | 27 June 1920 (aged 29) | 16 | Club Deportivo Universidad Católica | Chile | ||
| - | FW | George Robledo | 14 April 1926 (aged 24) | 0 | Newcastle United F.C. | England | ||
| - | MF | Carlos Rojas | 1928 | 5 | Unión Española | Chile | ||
| - | DF | Fernando Roldán | 1921 | 0 | Club Deportivo Universidad Católica | Chile | ||
| - | MF | Osvaldo Saez | 11 | Colo-Colo | Chile | |||
| - | DF | Francisco Urroz | 10 | Colo-Colo | Chile | |||
| UNITED STATES of AMERICA (Group 2) | ||||||||
| Head coach: William Jeffrey | ||||||||
| - | DF | Robert Annis | 5 September 1928 (aged 21) | 1 | St. Louis Simpkins-Ford | United States | ||
| - | MF | Walter Bahr | 1 April 1927 (aged 23) | 7 | Philadelphia Nationals | United States | ||
| - | GK | Frank Borghi | 9 April 1925 (aged 25) | 4 | St. Louis Simpkins-Ford | United States | ||
| - | MF | Charlie Colombo | 20 July 1920 (aged 29) | 7 | St. Louis Simpkins-Ford | United States | ||
| - | DF | Geoff Coombes | 23 April 1919 (aged 31) | 0 | Chicago Vikings | United States | ||
| - | FW | Robert Craddock | 5 September 1923 (aged 26) | 0 | Pittsburgh Harmarville S.C. | United States | ||
| - | FW | Nicholas DiOrio | 4 February 1921 (aged 29) | 0 | Pittsburgh Harmarville S.C. | United States | ||
| - | FW | Joe Gaetjens | 19 March 1924 (aged 26) | 0 | New York Brookhattan | United States | ||
| - | GK | Gino Gardassanich | 26 November 1922 (aged 27) | 0 | Chicago Slovaks | United States | ||
| - | DF | Harry Keough | 15 November 1927 (aged 22) | 3 | St. Louis McMahon | United States | ||
| - | DF | Joe Maca | 28 September 1920 (aged 29) | 0 | Brooklyn Hispano | United States | ||
| - | MF | Ed McIlvenny | 21 October 1924 (aged 25) | 0 | Philadelphia Nationals | United States | ||
| - | FW | Gino Pariani | 21 February 1928 (aged 22) | 2 | St. Louis Simpkins-Ford | United States | ||
| - | FW | Ed Souza | 22 September 1921 (aged 28) | 2 | Ponta Delgada S.C. | United States | ||
| - | FW | John Souza | 12 July 1920 (aged 29) | 9 | Ponta Delgada S.C. | United States | ||
| - | FW | Frank Wallace | 15 July 1922 (aged 27) | 4 | St. Louis Simpkins-Ford | United States | ||
| - | FW | Adam Wolanin | 13 November 1919 (aged 30) | 0 | Chicago Eagles | United States | ||
| SWEDEN (Group 3) | ||||||||
| Head coach: George Raynor (England) | ||||||||
| - | MF | Olle Åhlund | 22 August 1920 (aged 29) | 15 | Degerfors IF | Sweden | ||
| - | DF | Sune Andersson | 22 February 1921 (aged 29) | 23 | AIK Stockholm | Sweden | ||
| - | DF | Ivan Bodin | 20 July 1923 (aged 26) | 0 | AIK Stockholm | Sweden | ||
| - | MF | Ingvar Gärd | 6 October 1921 (aged 28) | 1 | Malmö FF | Sweden | ||
| - | FW | Hasse Jeppson | 10 May 1925 (aged 25) | 1 | Djurgårdens IF Stockholm | Sweden | ||
| - | DF | Gunnar Johansson | 29 February 1924 (aged 26) | 0 | GAIS | Sweden | ||
| - | FW | Egon Jönsson | 6 December 1926 (aged 23) | 7 | Malmö FF | Sweden | ||
| - | GK | Torsten Lindberg | 14 April 1917 (aged 33) | 18 | IFK Norrköping | Sweden | ||
| * | DF | Arne Månsson | 1 | Malmö FF | Sweden | |||
| - | FW | Bror Mellberg | 9 December 1923 (aged 26) | 1 | AIK Stockholm | Sweden | ||
| - | DF | Erik Nilsson | 6 August 1916 (aged 33) | 28 | Malmö FF | Sweden | ||
| - | FW | Stellan Nilsson | 28 May 1922 (aged 28) | 15 | Malmö FF | Sweden | ||
| - | MF | Knut Nordahl | 13 January 1920 (aged 30) | 22 | IFK Norrköping | Sweden | ||
| - | FW | Karl-Erik Palmér | 17 April 1929 (aged 21) | 5 | Malmö FF | Sweden | ||
| - | FW | Ingvar Rydell | 7 May 1922 (aged 28) | 2 | Malmö FF | Sweden | ||
| - | DF | Lennart Samuelsson | 7 July 1924 (aged 25) | 1 | IF Elfsborg Borås | Sweden | ||
| - | FW | Lennart Skoglund | 24 December 1929 (aged 20) | 1 | AIK Stockholm | Sweden | ||
| - | FW | Stig Sundqvist | 19 July 1922 (aged 27) | 6 | IFK Norrköping | Sweden | ||
| - | GK | Kalle Svensson | 11 November 1925 (aged 24) | 4 | Helsingborgs IF | Sweden | ||
| - | FW | Kurt Svensson | 0 | IS Halmia | Sweden | |||
| - | GK | Tore Svensson | 6 December 1927 (aged 22) | 0 | Malmö FF | Sweden | ||
| - | FW | Börje Tapper | 20 May 1922 (aged 28) | 4 | Malmö FF | Sweden | ||
| ITALY (Group 3) | ||||||||
| Head coach: Ferruccio Novo | ||||||||
| - | FW | Amedeo Amadei | 26 July 1921 (aged 28) | 6 | Internazionale Milano F.C. | Italy | ||
| - | DF | Carlo Annovazzi | 24 May 1925 (aged 25) | 10 | A.C. Milan | Italy | ||
| - | DF | Ivano Blason | 24 May 1923 (aged 27) | 0 | U.S. Triestina Calcio | Italy | ||
| - | FW | Giampiero Boniperti | 4 July 1928 (aged 21) | 6 | Juventus F.C. | Italy | ||
| - | FW | Aldo Campatelli | 7 April 1919 (aged 31) | 6 | Internazionale Milano F.C. | Italy | ||
| - | FW | Gino Cappello | 2 June 1920 (aged 30) | 3 | Bologna F.C. 1909 | Italy | ||
| - | FW | Emilio Caprile | 30 September 1928 (aged 21) | 2 | Atalanta B.C. | Italy | ||
| - | FW | Riccardo Carapellese | 1 July 1922 (aged 27) | 11 | Torino F.C. | Italy | ||
| - | GK | Giuseppe Casari | 10 April 1922 (aged 28) | 2 | Atalanta B.C. | Italy | ||
| - | DF | Osvaldo Fattori | 22 June 1922 (aged 28) | 3 | Internazionale Milano F.C. | Italy | ||
| - | DF | Zeffiro Furiassi | 19 January 1923 (aged 27) | 0 | S.S. Lazio | Italy | ||
| - | DF | Attilio Giovannini | 30 July 1924 (aged 25) | 4 | Internazionale Milano F.C. | Italy | ||
| - | FW | Benito Lorenzi | 20 December 1925 (aged 24) | 5 | Internazionale Milano F.C. | Italy | ||
| - | MF | Augusto Magli | 9 March 1923 (aged 27) | 0 | ACF Fiorentina | Italy | ||
| - | MF | Giacomo Mari | 17 October 1924 (aged 25) | 3 | Juventus F.C. | Italy | ||
| - | GK | Giuseppe Moro | 16 January 1921 (aged 29) | 2 | Torino F.C. | Italy | ||
| - | FW | Ermes Muccinelli | 28 July 1927 (aged 22) | 2 | Juventus F.C. | Italy | ||
| - | FW | Egisto Pandolfini | 19 February 1926 (aged 24) | 0 | AC Fiorentina | Italy | ||
| - | MF | Carlo Parola | 20 September 1921 (aged 28) | 9 | Juventus F.C. | Italy | ||
| - | MF | Leandro Remondini | 17 November 1917 (aged 32) | 0 | S.S. Lazio | Italy | ||
| - | GK | Lucidio Sentimenti | 1 July 1920 (aged 29) | 7 | S.S. Lazio | Italy | ||
| - | MF | Omero Tognon | 3 March 1924 (aged 26) | 4 | A.C. Milan | Italy | ||
| PARAGUAY (Group 3) | ||||||||
| Head coach: Manuel Fleitas Solich | ||||||||
| - | FW | Enrique Avalos | 1922 | Cerro Porteño | Paraguay | |||
| - | FW | Marcial Avalos | Cerro Porteño | Paraguay | ||||
| - | MF | Melanio Baez | Club Nacional | Paraguay | ||||
| - | FW | Ángel Berni | 9 January 1931 (aged 19) | Club Sportivo Luqueño | Paraguay | |||
| - | DF | Antonio Cabrera | Club Libertad Asunción | Paraguay | ||||
| - | FW | Lorenzo Calonga | Club Guaraní | Paraguay | ||||
| - | FW | Juan Cañete | Club Presidente Hayes | Paraguay | ||||
| - | MF | Castor Cantero | 1918 | Olimpia Asunción | Paraguay | |||
| - | GK | Pablo Centurión | Cerro Porteño | Paraguay | ||||
| - | DF | Casiano Céspedes | 1924 | Olimpia Asunción | Paraguay | |||
| - | DF | Manuel Gavilán | 1921 | Club Libertad Asunción | Paraguay | |||
| - | DF | Alberto González | 1922 | Olimpia Asunción | Paraguay | |||
| - | MF | Armando González | Club Guaraní | Paraguay | ||||
| - | MF | Victoriano Leguizamón | 1923 | Olimpia Asunción | Paraguay | |||
| - | FW | Atilio López | 1925 | Club Nacional | Paraguay | |||
| - | FW | César López Fretes | 21 March 1923 (aged 27) | Olimpia Asunción | Paraguay | |||
| - | FW | Hilarión Osorio | Club Sportivo Luqueño | Paraguay | ||||
| - | DF | Elioro Paredes | Club Sportivo Luqueño | Paraguay | ||||
| - | FW | Darío Saguier | 11 September 1926 (aged 23) | Cerro Porteño | Paraguay | |||
| - | FW | Francisco Sosa | Cerro Porteño | Paraguay | ||||
| - | FW | Leongino Unzaim | 16 May 1925 (aged 25) | Olimpia Asunción | Paraguay | |||
| - | GK | Marcelino Vargas | 1921 | Club Libertad Asunción | Paraguay | |||
| URUGUAY (Group 4) | ||||||||
| Head coach: Juan López | ||||||||
| - | FW | Julio César Britos | 18 May 1926 (aged 24) | 10 | Peñarol | Uruguay | ||
| - | FW | Juan Burgueño | 1923 | 4 | Futbol Club Danubio Montevideo | Uruguay | ||
| - | DF | Schubert Gambetta | 14 April 1920 (aged 30) | 39 | Club Nacional de Football | Uruguay | ||
| - | FW | Alcides Ghiggia | 22 December 1926 (aged 23) | 3 | Peñarol | Uruguay | ||
| - | DF | Juan Carlos González | 22 August 1924 (aged 25) | 3 | Peñarol | Uruguay | ||
| - | DF | Matías González | 6 August 1925 (aged 24) | 7 | Club Atletico Cerro Montevideo | Uruguay | ||
| - | DF | William Martínez | 13 January 1928 (aged 22) | 3 | Rampla Juniors | Uruguay | ||
| - | GK | Roque Máspoli | 12 October 1917 (aged 32) | 27 | Peñarol | Uruguay | ||
| - | FW | Oscar Míguez | 5 December 1927 (aged 22) | 5 | Peñarol | Uruguay | ||
| - | FW | Rubén Morán | 6 August 1930 (aged 19) | 2 | Club Atletico Cerro Montevideo | Uruguay | ||
| - | MF | Washington Ortuño | 13 May 1928 (aged 22) | 0 | Peñarol | Uruguay | ||
| - | GK | Aníbal Paz | 18 February 1918 (aged 32) | 23 | Club Nacional de Football | Uruguay | ||
| - | FW | Julio Pérez | 19 June 1926 (aged 24) | 7 | Club Nacional de Football | Uruguay | ||
| - | MF | Rodolfo Pini | 1926 | 6 | Club Nacional de Football | Uruguay | ||
| - | FW | Luis Rijo | 28 September 1927 (aged 22) | 0 | Central Fútbol Club | Uruguay | ||
| - | MF | Víctor Rodríguez Andrade | 2 May 1927 (aged 23) | 11 | Central Fútbol Club | Uruguay | ||
| - | FW | Carlos Romero | 7 September 1927 (aged 22) | 3 | Futbol Club Danubio Montevideo | Uruguay | ||
| - | FW | Juan Alberto Schiaffino | 28 July 1925 (aged 24) | 9 | Peñarol | Uruguay | ||
| - | DF | Eusebio Tejera | 6 January 1922 (aged 28) | 28 | Club Nacional de Football | Uruguay | ||
| - | MF | Obdulio Varela | 20 September 1917 (aged 32) | 39 | Peñarol | Uruguay | ||
| - | FW | Ernesto Vidal | 15 November 1921 (aged 28) | 0 | Peñarol | Uruguay | ||
| - | DF | Héctor Vilches | 14 February 1926 (aged 24) | 5 | Club Atletico Cerro Montevideo | Uruguay | ||
| BOLIVIA (Group 4) | ||||||||
| Head coach: Mario Pretto | ||||||||
| - | DF | Alberto Figueroa de Acha | 3 April 1920 (aged 30) | 23 | The Strongest | Bolivia | ||
| - | FW | Víctor Celestino Algarañaz | 1926 | 8 | Litoral | Bolivia | ||
| - | MF | Alberto Aparicio | 0 | Feroviario La Paz | Bolivia | |||
| - | MF | Duberty Aráoz | 10 | Litoral | Bolivia | |||
| - | GK | Vicente Arraya | 26 | Feroviario La Paz | Bolivia | |||
| - | MF | Juan Arricio | 0 | Ayacucho La Paz | Bolivia | |||
| - | FW | Víctor Brown | 2 | Litoral | Bolivia | |||
| - | DF | José Bustamante | 1921 | 31 | Litoral | Bolivia | ||
| - | MF | René Cabrera | 8 | Club Jorge Wilstermann | Bolivia | |||
| - | FW | Roberto Capparelli | 1923 | 0 | The Strongest | Bolivia | ||
| - | MF | Leonardo Ferrel | 1924 | 18 | The Strongest | Bolivia | ||
| - | FW | Benedicto Godoy Véizaga | 9 | Feroviario La Paz | Bolivia | |||
| - | DF | Antonio Greco | 1923 | 0 | Litoral | Bolivia | ||
| - | FW | Juan Guerra | 9 | Feroviario La Paz | Bolivia | |||
| - | FW | Benigno Gutiérrez | 1 September 1925 (aged 24) | 15 | Litoral | Bolivia | ||
| - | GK | Eduardo Gutiérrez | 2 September 1922 (aged 27) | 12 | CD Ingavi | Bolivia | ||
| - | FW | Benjamin Maldonado | 1928 | 4 | San Jose de Oruro | Bolivia | ||
| - | FW | Mario Mena | 1923 | 9 | Club Bolívar | Bolivia | ||
| - | MF | Humberto Saavedra | 0 | The Strongest | Bolivia | |||
| - | MF | Eulogio Sandoval | 0 | Litoral | Bolivia | |||
| - | FW | Víctor Agustín Ugarte | 5 May 1926 (aged 24) | 16 | Club Bolívar | Bolivia | ||
| - | MF | Antonio Valencia | 1927 | 9 | Club Bolívar | Bolivia | ||
| Note: This was the first FIFA World Cup Finals tournament when shirt numbers were worn but they were simply numbered from 1 to 11 and squad numbers weren't allocated. | ||||||||