The cardinal electors in the 1958 papal conclave were 53, of whom 51 participated. This list is arranged by region and within each alphabetically. Two were impeded from attending by their Communist governments: József Mindszenty was confined to the U.S. Embassy in Budapest, and Aloysius Stepinac was under house arrest in Yugoslavia.^[1] A 54th cardinal, Edward Mooney of Detroit, traveled to Rome to attend the papal conclave, but died of a heart attack three hours before it began.^[2]

Roman Curia

1. Benedetto Aloisi Masella, Camerlengo, Prefect of Discipline of the Sacraments
2. Nicola Canali, Major Penitentiary
3. Gaetano Cicognani, Prefect of Apostolic Signatura
4. Pietro Ciriaci, Prefect of Congregation of the Council
5. Pietro Fumasoni Biondi, Prefect of the Congregation for the Propagation of the Faith
6. Marcello Mimmi, Secretary of Consistorial Congregation
7. Alfredo Ottaviani, Pro-Secretary of the Holy Office
8. Giuseppe Pizzardo, Secretary of Holy Office, Prefect of Seminaries and Universities
9. Federico Tedeschini, Datary of His Holiness
10. Eugène-Gabriel-Gervais-Laurent Tisserant, Dean of the College of Cardinals, Secretary of Oriental Churches
11. Valerio Valeri, Prefect of Religious

Europe

Italy

1. Elia Dalla Costa, Archbishop of Florence
2. Maurilio Fossati, OSsCGN, Archbishop of Turin
3. Giacomo Lercaro, Archbishop of Bologna
4. Clemente Micara, Vicar General of Rome
5. Angelo Giuseppe Roncalli, Patriarch of Venice (was elected and chose the name John XXIII)
6. Ernesto Ruffini, Archbishop of Palermo
7. Giuseppe Siri, Archbishop of Genoa

France

1. Maurice Feltin, Archbishop of Paris
2. Pierre-Marie Gerlier, Archbishop of Lyon
3. Georges-François-Xavier-Marie Grente, Archbishop-Bishop of Le Mans
4. Achille Liénart, Bishop of Lille
5. Clément-Emile Roques, Archbishop of Rennes

Spain

1. Benjamín de Arriba y Castro, Archbishop of Tarragona
2. Enrique Pla y Deniel, Archbishop of Toledo
3. Fernando Quiroga y Palacios, Archbishop of Santiago de Compostela

Germany

1. Josef Frings, Archbishop of Cologne
2. Joseph Wendel, Archbishop of Munich and Freising

Belgium

1. Jozef-Ernest van Roey, Archbishop of Mechelen

Hungary

1. József Mindszenty, Archbishop of Esztergom (absent)

Ireland and United Kingdom

1. John D'Alton, Archbishop of Armagh (archdiocese contains territory in both the Republic of Ireland and Northern Ireland)

Poland

1. Stefan Wyszyński, Archbishop of Warsaw and Gniezno

Portugal

1. Manuel Gonçalves Cerejeira, Patriarch of Lisbon

Soviet Union

1. Gregorio Pietro Agagianian, Patriarch of Cilicia of the Armenians

Yugoslavia

1. Aloysius Stepinac, Archbishop of Zagreb (absent)

North America

Canada

1. Paul-Émile Léger, PSS, Archbishop of Montreal
2. James Charles McGuigan, Archbishop of Toronto

United States

1. James Francis McIntyre, Archbishop of Los Angeles
2. Francis Spellman, Archbishop of New York

Cuba

1. Manuel Arteaga y Betancourt, Archbishop of San Cristobal de la Habana

South America

Brazil

1. Jaime de Barros Câmara, Archbishop of São Sebastião de Rio de Janeiro
2. Augusto da Silva, Archbishop of São Salvador da Bahia
3. Carlos Carmelo Vasconcellos Motta, Archbishop of São Paulo

Argentina

1. Antonio Caggiano, Bishop of Rosario
2. Santiago Copello, Archbishop of Buenos Aires

Chile

1. José Caro Rodríguez, Archbishop of Santiago

Colombia

1. Crisanto Luque Sánchez, Archbishop of Bogotá

Ecuador

1. Carlos María de la Torre, Archbishop of Quito

Asia

Chinaedit

1. Thomas Tien Ken-sin, SVD, Archbishop of Beijing

Indiaedit

1. Valerian Gracias, Archbishop of Bombay

Syriaedit

1. Ignatius Gabriel I Tappuni, Patriarch of Antioch of the Syrians (born in Mosul, in modern-day Iraq)

Africaedit

Mozambiqueedit

1. Teódosio de Gouveia, Archbishop of Lourenço Marques

Oceaniaedit

Australiaedit

1. Norman Gilroy, Archbishop of Sydney

Referencesedit

• Conclave of October 25 - 28, 1958