| Date of Death | Deceased Cardinals (43) |
| 1740.01.11 | Cardinal-Priest of S. Lorenzo in Lucina (1737.02.11 – 1740.01.11) Archbishop-Bishop emeritus of Rimini (Italy) (1698.03.10 – 1726.12.07) Prefect of Sacred Congregation of the Index (1737? – 1740.01.11) |
| 1740.01.22 | Cardinal-Priest of Ss. Bonifacio ed Alessio (1717.05.10 – 1740.01.22) |
| 1740.02.29 | Cardinal-Bishop of Ostia–Velletri (1738.09.03 – 1740.02.29) Cardinal-Priest of S. Lorenzo in Damaso in commendum (1725.01.29 – 1740.02.29) Vice-Chancellor of Apostolic Chancery (1689.11.14 – 1740.02.29) Archpriest of Papal Archbasilica of Saint John Lateran (1730 – 1740.02.29) Secretary of Commission of Roman and Universal Inquisition (1726.06.14 – 1740.02.29) |
| 1740.03.12 | Cardinal-Bishop of Palestrina (1739.01.26 – 1740.03.12) Camerlengo emeritus of Sacred College of Cardinals (1732.03.03 – 1733.01.19) |
| 1740.06.02 | Cardinal-Priest of S. Callisto (1728.09.20 – 1740.06.02) Bishop emeritus of Bergamo (Italy) (1728.04.12 – 1730.11.18) Prefect of Sacred Congregation of the Index (1740.01 – 1740.06.02) |
| 1740.06.24 | Cardinal-Priest of S. Agnese fuori le mura (1735.06.27 – 1740.06.24) Metropolitan Archbishop of Benevento (Italy) (1733.12.18 – 1740.06.24) |
| 1740.12.13 | Cardinal-Priest of Ss. XII Apostoli (1725.01.29 – 1740.12.13) Metropolitan Archbishop emeritus of Milano (Italy) (1712.10.05 – 1736.12.06) |
| 1741.05.16 | Cardinal-Deacon of S. Maria in Portico (1734.04.12 – 1741.05.16) Bishop emeritus of Osimo (Italy) (1734.09.15 – 1740.09.15) Bishop emeritus of Cingoli (Italy) (1734.09.15 – 1740.09.15) |
| 1741.05.21 | Cardinal-Deacon of Ss. Cosma e Damiano (1730.11.22 – 1741.05.21) Secretary emeritus of Sacred Congregation of the Propagation of the Faith (1724 – 1728) |
| 1741.08.03 | Cardinal-Deacon of S. Maria in Via Lata (1730.07.24 – 1741.08.03) |
| 1741.09.25 | Cardinal-Priest of S. Maria in Ara Coeli (1733.12.02 – 1741.09.25) |
| 1741.11.20 | Cardinal-Priest of S. Maria degli Angeli (1725.12.19 – 1741.11.20) Metropolitan Archbishop of Auch (France) (1726.02.20 – 1741.11.20) |
| 1742.02.20 | Cardinal-Deacon of S. Adriano al Foro (1739.09.30 – 1742.02.20) Vice-Camerlengo of the Holy Roman Church emeritus of Reverend Apostolic Camera (1734.08.06 – 1739.07.15) |
| 1742.09.18 | Cardinal-Priest of S. Sisto (1738.09.26 – 1742.09.18) Patriarch emeritus of Jerusalem (1728.04.29 – 1729.03.23) Camerlengo emeritus of Sacred College of Cardinals (1735.01.17 – 1736?) |
| 1742.12.09 | Cardinal-Priest of S. Maria in Via (1729.12.23 – 1742.12.09) |
| 1742.12.23 | Cardinal-Priest of Ss. Bonifacio ed Alessio (1740.09.16 – 1742.12.23) Metropolitan Archbishop of Milano (Italy) (1737.05.06 – 1742.12.23) |
| 1743.01.12 | Cardinal-Priest of S. Maria degli Angeli (1741.12.20 – 1743.01.12) Patriarch emeritus of Constantinople (1718.02.11 – 1729.03.23) Prefect emeritus of Prefecture of the Holy Apostolic Palaces (1725.07.06 – 1729.03.23) |
| 1743.01.27 | Cardinal-Priest of S. Giovanni a Porta Latina (1734.04.12 – 1743.01.27) Prior General emeritus of Order of Friar Servants of Mary (Servites) (1725 – 1734.05) |
| 1743.01.29 | Bishop emeritus of Fréjus (France) (1698.05.18 – 1715.05.03) |
| 1743.01.30 | Cardinal-Deacon of S. Maria ad Martyres (1725.07.23 – 1743.01.30) Prefect emeritus of Prefecture of the Holy Apostolic Palaces (1715.05.07 – 1725.06.11) |
| 1743.02.08 | Cardinal-Bishop of Frascati (1734.12.15 – 1743.02.08) Pro-Datary of His Holiness emeritus of Apostolic Dataria (1721.05.12 – 1730) |
| 1743.02.22 | Cardinal-Priest of S. Prassede (1738.09.03 – 1743.02.22) Bishop emeritus of Cartagena (Spain) (1705.02.09 – 1724.09.11) Camerlengo emeritus of Sacred College of Cardinals (1728.01.26 – 1729.02.07) |
| 1743.03.04 | Cardinal-Deacon of S. Angelo in Pescheria (1739.11.16 – 1743.03.04) |
| 1743.04.05 | Cardinal-Priest of S. Maria in Trastevere (1743.03.11 – 1743.04.05) Bishop emeritus of Avellino (Italy) (1722.07.06 – 1726.07.29) Master of Papal Chamber emeritus of Prefecture of the Holy Apostolic Palaces (1726.06.13 – 1728.01.26) |
| 1743.08.10 | Cardinal-Bishop of Porto e Santa Rufina (1740.08.29 – 1743.08.10) Archpriest of Papal Basilica of Saint Mary Major (1730.07 – 1743.08.10) |
| 1743.08.19 | Cardinal-Priest of S. Maria della Pace (1726.12.23 – 1743.08.19) |
| 1744.08.30 | |
| 1744.10.24 | Cardinal-Priest of S. Croce in Gerusalemme (1740.08.29 – 1744.10.24) Archbishop-Bishop emeritus of Aversa (Italy) (1730.12.11 – 1734.09.26) Prefect of Sacred Congregation of Bishops and Regulars (1738.08.27 – 1744.10.24?) Prefect of Supreme Tribunal of the Apostolic Signatura (1737.11.29 – 1744.10.24?) |
| 1744.11.12 | Metropolitan Archbishop emeritus of Bourges (France) (1694.08.30 – 1729.03.05) |
| 1745.01.17 | Cardinal-Priest of S. Sisto (1743.09.23 – 1745.01.17) |
| 1745.11.20 | Cardinal-Priest of S. Agostino (1731.01.08 – 1745.11.20) Archbishop-Bishop of Ancona e Umana (Italy) (1731.05.21 – 1745.11.20) |
| 1746.02.20 | |
| 1746.08.27 | Cardinal-Priest of S. Maria in Ara Coeli (1743.09.23 – 1746.08.27) Dean emeritus of Sacred Roman Rota (1734.09.01 – 1743.09.09) |
| 1747.01.16 | Cardinal-Deacon of S. Maria in Via Lata (1741.08.07 – 1747.01.16) |
| 1747.03.20 | Cardinal-Priest of S. Cecilia (1733.01.19 – 1747.03.20) Metropolitan Archbishop of Monreale (Italy) (1739.05.04 – 1747.03.20) |
| 1747.03.21 | Cardinal-Bishop of Frascati (1743.03.11 – 1747.03.21) Archbishop-Bishop emeritus of Imola (Italy) (1728.04.12 – 1739) |
| 1747.03.21 | Cardinal-Bishop of Palestrina (1740.09.16 – 1747.03.21) Prefect of Sacred Congregation of the Propagation of the Faith (1727.01.10 – 1747.03.21) Major Penitentiary of Sacred Apostolic Penitentiary (1730.07 – 1747.03.21) |
| 1747.04.23 | Cardinal-Priest of S. Callisto (1740.09.16 – 1747.04.23) |
| 1747.09.28 | Cardinal-Priest of S. Maria sopra Minerva (1730.08.14 – 1747.09.28) |
| 1747.10.04 | |
| 1748.02.21 | Cardinal-Priest of S. Marcello (1743.09.23 – 1748.02.21) Prefect of Sacred Congregation of Bishops and Regulars (1744.11.10 – 1748.02.21) Prefect of Sacred Congregation of Indulgences and Sacred Relics (1743.09.23 – 1748.02.21) |
| 1749.07.16 | Cardinal-Priest of SS. Trinità al Monte Pincio (1721.06.16 – 1749.07.16) Bishop of Strasbourg (France) (1704.04.09 – 1749.07.16) |
| 1749.08.20 | Cardinal-Priest of S. Susanna (1747.05.15 – 1749.08.20) Bishop of Viterbo (Italy) (1748.05.06 – 1749.08.20) Bishop of Tuscanella (Italy) (1748.05.06 – 1749.08.20) |
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