| Newly Elected Bishops (61) | Elected | Consecrated |
 Archbishop Auguste-Fernand Leynaudformer Metropolitan Archbishop of Alger–Iulia Caesarea (Algeria) | 1917.01.02 | 1917.03.06 |
| Bishop Amiel-François Bessière former Bishop of Constantine (Algeria) | 1917.01.02 | 1917.04.11 |
 Bishop Nicolas Charikiopoulosformer Bishop of Chios (Greece) | 1917.01.03 | 1917.03.25 |
 Cardinal Lorenzo Lauriformer Cardinal-Priest of S. Pancrazio former Major Penitentiary of Sacred Apostolic Penitentiary former Camerlengo of the Holy Roman Church of Reverend Apostolic Camera | 1917.01.05 | 1917.01.21 |
 Bishop Stefano Aurelio Bacciarini, S.C.former Superior General of Congregation of the Servants of Charity | 1917.01.12 | 1917.01.21 |
 Archbishop Plácido Ángel Rey de Lemos, O.F.M.former Bishop of Lugo (Spain) | 1917.01.18 | 1917.02.25 |
 Blessed Bishop Yosafat Kotsylovs’kyi (Йосафат Коциловський), O.S.B.M. (Ukrainian Rite)former Bishop of Przemyśl of the Ukrainians (Poland) | 1917.01.29 | 1917.09.23 |
 Bishop James Paul McCloskeyformer Bishop of Jaro (Philippines) | 1917.02.05 | 1917.05.01 |
| Archbishop Santiago Caragnan Sancho former Metropolitan Archbishop of Nueva Segovia (Philippines) | 1917.02.05 | 1917.06.29 |
 Bishop John McCarthyformer Bishop of Sandhurst (Australia) | 1917.02.14 | 1917.06.07 |
 Bishop Joseph Raphael John Crimont, S.J.former Vicar Apostolic of Alaska (USA) | 1917.02.15 | 1917.07.25 |
 Bishop Bernard Nicholas Wardformer Bishop of Brentwood (England) | 1917.03.22 | 1917.04.10 |
| Bishop Alberto Romita former Bishop of Boiano–Campobasso (Italy) | 1917.03.22 | 1917.04.15 |
| Bishop Luigi Scarano former Bishop of Tivoli (Italy) | 1917.03.22 | 1917.05.01 |
 Bishop Emile-Joannes Seghersformer Bishop of Gent (Belgium) | 1917.03.22 | 1917.05.01 |
 Bishop Eugène-Louis-Ernest Julienformer Bishop of Arras (France) | 1917.03.22 | 1917.05.08 |
| Bishop Carlo Taccetti former Bishop of Gubbio (Italy) | 1917.03.22 | 1917.05.20 |
| Bishop Alexandre Caillot former Bishop of Grenoble (France) | 1917.03.22 | 1917.05.29 |
| Bishop Giuseppe Conti former Bishop of Pienza (Italy) former Bishop of Chiusi (Italy) | 1917.03.22 | 1917.06.03 |
| Bishop Pierre Verdier former Auxiliary Bishop of Rodez (France) | 1917.03.22 | 1917.06.20 |
 Bishop Angel Diego y Carbajal (翟德隆), O.E.S.A.former Vicar Apostolic of Changde 常德 (China) | 1917.03.22 | 1917.06.23 |
| Bishop Bonaventura Porta former Bishop of Pesaro (Italy) | 1917.03.22 | 1917.06.24 |
 Bishop Gaston Robichez, S.J.former Bishop of Trincomalee (Sri Lanka) | 1917.03.22 | 1917.07.08 |
 Bishop Georges-Marie de Labonninière de Beaumont, C.S.Sp.former Bishop of Saint-Denis-de-La Réunion (Réunion) | 1917.03.22 | 1917.10.14 |
 Blessed Bishop Iuliu Hossu (Romanian Rite)former Bishop of Cluj–Gherla of the Romanians (Romania) | 1917.04.03 | 1917.12.04 |
| Pope Pius XII former Supreme Pontiff former Prefect of Sacred Consistorial Congregation former Prefect of Sacred Congregation for the Oriental Churches former Prefect of Supreme Sacred Congregation of the Holy Office | 1917.04.23 | 1917.05.13 |
| Archbishop Giuseppe Palica former Vicegerent for the Vicariate of Rome of Roma (Italy) | 1917.04.25 | 1917.05.20 |
| Bishop Eugenio Beccegato former Bishop of Vittorio Veneto (Italy) | 1917.05.19 | 1917.06.17 |
| Archbishop Bartolomeo Cattaneo former Treasurer General of Reverend Apostolic Camera | 1917.05.21 | 1917.06.10 |
 Bishop Louis-Christian-Marie de Cooman, M.E.P.former Bishop of Thanh Hoá (Vietnam) | 1917.06.12 | 1918.01.06 |
 Bishop Antonio Stoppani, F.S.C.I.former Vicar Apostolic of Bahr el-Ghazal (South Sudan) | 1917.06.13 | 1917.12.21 |
| Bishop Flaminio Belotti (包海容), P.I.M.E. former Vicar Apostolic of Nanyangfu 南陽府 (China) | 1917.06.14 | 1918.01.06 |
 Bishop Hermann Joseph (Thomas) Esser, O.P.former Secretary of Sacred Congregation of the Index | 1917.06.18 | 1917.07.08 |
| Bishop Francisco Ruiz de Azúa Ortiz de Zárate, O.P. former Vicar Apostolic of Hai Phòng (Vietnam) | 1917.06.19 | 1917.12.09 |
| Bishop Hyacinthe-Jean Chassagnon former Bishop of Autun (France) | 1917.06.28 | 1917.10.10 |
| Bishop Giuseppe Bertazzoni former Bishop of Massa Carrara (Italy) | 1917.06.30 | 1917.09.12 |
 Bishop Giorgio Glosauerformer Auxiliary Bishop of Praha (Czechia) | 1917.07.07 | 1917.09.08 |
| Bishop Giovanni Sedlák former Auxiliary Bishop of Praha (Czechia) | 1917.07.07 | 1917.09.08 |
 Bishop Nándor Rottformer Bishop of Veszprém (Hungary) | 1917.07.12 | 1917.09.23 |
 Bishop Patrice-Alexandre Chiasson, C.I.M.former Bishop of Bathurst (Canada) | 1917.07.27 | 1917.10.18 |
| Bishop Henri Lécroart (劉欽明), S.J. former Vicar Apostolic of Xianxian 獻縣 (China) | 1917.07.30 | 1918.02.07 |
| Bishop Ludwig Sebastian former Bishop of Speyer (Germany) | 1917.07.31 | 1917.09.23 |
 Archbishop Angelo Raffaele Bernacchioni, O.F.M. Cap.former Metropolitan Archbishop of Agra (India) | 1917.08.07 | 1917.12.27 |
| Bishop Denis Matthew Lowney former Auxiliary Bishop of Providence (USA) | 1917.08.24 | 1917.10.23 |
 Bishop Henry Gray Grahamformer Auxiliary Bishop of Saint Andrews and Edinburgh (Scotland) | 1917.08.30 | 1917.11.16 |
 Archbishop Antônio dos Santos Cabralformer Metropolitan Archbishop of Belo Horizonte (Brazil) | 1917.09.01 | 1918.04.14 |
 Archbishop Joaquín Garcia Benitez, C.I.M.former Metropolitan Archbishop of Medellín (Colombia) | 1917.09.17 | 1918.02.17 |
| Archbishop John Joseph Cantwell former Metropolitan Archbishop of Los Angeles (USA) | 1917.09.21 | 1917.12.05 |
| Bishop Manuel Bidwell former Auxiliary Bishop of Westminster (England) | 1917.10.30 | 1917.12.08 |
| Bishop William Keatinge former Military Vicar of Great Britain (England) | 1917.10.30 | 1918.02.25 |
 Bishop Zygmunt Łozińskiformer Bishop of Pinsk (Belarus) | 1917.11.02 | 1918.07.28 |
| Archbishop Amedeo Casabona former Bishop of Chiavari (Italy) former Archbishop ad personam | 1917.11.03 | 1917.12.08 |
 Bishop Charles O’Sullivanformer Bishop of Ardfert and Aghadoe (Ireland) | 1917.11.10 | 1918.01.27 |
| Bishop Luca Piergiovanni former Bishop of Tarquinia (Italy) former Bishop of Civitavecchia (Italy) | 1917.11.10 | 1918.02.02 |
| Archbishop John Mark Gannon former Bishop of Erie (USA) former Archbishop ad personam | 1917.11.13 | 1918.02.06 |
| Bishop Luigi Ferretti former Bishop of Macerata (Italy) former Bishop of Tolentino (Italy) | 1917.11.17 | 1918.02.24 |
 Bishop Jean Forbes, M. Afr.former Coadjutor Vicar Apostolic of Uganda (Uganda) former Coadjutor Vicar Apostolic of Kampala (Uganda) | 1917.11.17 | 1918.05.19 |
| Bishop Antonio María Pueyo de Val, C.M.F. former Bishop of Pasto (Colombia) | 1917.11.26 | 1918.01.06 |
| Bishop Jean-Joseph-Benoît-Marie Martel former Bishop of Digne (France) | 1917.11.27 | 1918.02.02 |
| Bishop William Codd former Bishop of Ferns (Ireland) | 1917.12.07 | 1918.02.25 |
| Bishop Francesco Cammarota former Bishop of Policastro (Italy) former Bishop of Capaccio–Vallo (Italy) | 1917.12.17 | 1918.03.19 |
