Like all dioceses in this category, for historical reasons it has since 1960 an incumbent residential bishop with ordinary powers but also has assigned to it as an honorary high ranking dignity one of the six cardinals in the Order of Cardinal Bishops. The Cardinal Bishop has no powers with regard to the government of the diocese.

The residential bishops have been:

• Pietro Severi (1966-1975)
• Renato Spallanzani (1975-1986)
• Pietro Garlato (1986-1991)
• Vittorio Tomassetti (1992-1997)
• Eduardo Davino (1997-2005)
• Domenico Sigalini (2005-present )

Bishops

To 1000

• Andrea I 769-773
• ''vacant 773-826
• Kostantin 826- ? (Bishop of Albano 772-826)
• vacant
• Leone 914-928 ?
• vacant c. 928-963
• Teofilo 963-988
• vacant
• Stefan I 988-996
• vacant
• Peter I 996-1015

1000-1200

• vacant 1015-1026
• Peter II 1026-1036
• vacant
• Johann I 1036-1040
• vacant 1040-1044
• John I 1044
• vacant 1044-1058
• Humbert I Poggi (Uberto Poggi) 1058
• Raniero, pseudocardinal
• vacant
• Berardo (Bernardo, Bruno) c. 1060
• vacant
• Loperto (Leoperto) 1065-1067
• vacant 1067-1073
• Humbert II (Uberto Belmonte, Umberto, Hubert) 1073-1081
• Attone 1081-1083/92
• Bernardo 1092-c. 1098
• Ugone Candido (Candido Bianco, Hugues Le Blanc) 1093 (pseudocardinal)
• Milone 1098-1104/5
• Corrado 1105-1106
• vacant 1106-1111
• Cuno of Praeneste 1111-1123 (Bishop of Frascati 1099-1105)
• Guglielmo I 1123-1139
• Stefano I 1139-1144
• Guarino Foscari 1144-1158
• Giulio I 1158-1164
• Ugo Ventimiglia ca.1165?-1172
• vacant 1172-1176
• Manfredo 1176-1178
• vacant 1178-1179
• Benerede 1179-1180
• Paolo Scolari 1180-1187
• Girard Mainard 1188
• vacant 1188-1191
• Giovanni III von Anagni 1190-1196
• vacant 1196-1200

1200-1400

• Guy I de Pare 1200-1206
• Guido Papareschi 1207-1221
• Guido II Pierleoni 1221-1228
• vacant 1228-1231
• Giacomo Pecorari 1231-1244
• vacant 1244-1251
• Stephan Vancza 1251-1269
• vacant 1269-1273
• Vicedominus de Vicedominis 1273-1276
• vacant 1276-1278
• Erard de Lessines 1278
• vacant 1278-1281
• Girolamo I Masci 1281-1288, later Pope Nicholas IV
• Bernardo V Berardi di Cagli 1288-1291
• vacant 1291-1294
• Simon I Beaulieu 1294-1297
• vacant 1297-1299
• Teodorico Raineri 1299-1306
• Pierre III de la Chapelle Taillefer 1306-1312
• Guillaume II de Mandagot 1312-1321
• vacant 1321-1323
• Pierre IV Despres 1323-1361 (Pierre des Prés, Peter de Pratis)
• Raymond de Canillac 1361-1373
• Simon Langham 1373-1376
• Jean du Cros 1377-1378 (in the obedience of Avignon until 1383))
• vacant 1378-1380
• Francesco Moricotti Prignani 1380-1394
• Gui de Maillesec 1384-1412
• Angelo Afflicti 1395-1401 (administrator)

1400-1600

• Oddo Colonna 1401-1405 (administrator)
• Antonio I Gaetani 1405-1409, † 1412 (Bishop of Porto 1409-1412)
• Angelo de Anna de Summaripa 1412-1428
• vacant 1428-1431
• Hugues de Lusignan 1431-1436, † 1442 (Bishop of Frascati 1436-1442)
• vacant 1436-1444
• Giovanni IV Tagliacotio 1444-1449
• Giorgio de Flisco 1449-1455
• vacant 1455-1460
• Juan de Torquemada 1460-1463, † 1468 (Bishop of Albano c. 1464 and Bishop of Sabina 1463-1468)
• vacant 1463-1465
• Alain de Cotivy 1465-1472, † 1474 (also Bishop of Sabina 1472-1474)
• Angelo Capranica 1472-1478
• Marco Balbo 1478-1491
• Jean Balue 1491 (Bishop of Albano 1483-1491)
• Giovanni VII Micheli 1491-1492, † 1503 (Bishop of Albano 1491, Bishop of Porto 1492-1503)
• Girolamo II Basso della Rovere 1492-1503, † 1507 (Bishop of Sabina 1503-1507)
• Lorenzo Cybo de Mari 1503 (Bishop of Albano 1501-1503, Bishop of Frascati 1503)
• Antonio Pallavicino 1503-1507 (Bishop of Frascati 1503-1505)
• Giovanni Antonio Sangiorgio 1507-1508, † 1509 (Bishop of Frascati 1505-1507, Bishop of Sabina 1508-1509)
• Bernardino Lopez de Carvajal 1508-1509 (Bishop of Frascati 1507-1509, of Sabina 1509-1521 and of Ostia and Velletri 1521-1523)
• Guillaume Briçonnet 1509-1511 (Bishop of Albano 1507-1508 and of Frascati 1509-1510)
• Marco II Vigerio 1511-1516
• Francesco II Soderini 1516-1523 (Bishop of Albano 1516-1517, of Porto 1523 and of Ostia and Velletri 1523-1524)
• Alessandro Farnese 1523
• Antonio Maria Ciocchi del Monte 1523-1524 (Bishop of Albano 1521-1523 and of Sabina 1524)
• Pietro V Accolti 1524, † 1532 (Bishop of Albano 1623-1524 and of Sabina 1524-1532)
• Marco Cornaro 1524
• Lorenzo Pucci 1524-1531 (Bishop of Albano 1524)
• Giovanni Piccolomini 1531-1533, † 1537 (Bishop of Albano 1524-1531, of Porto 1533-1535 and of Ostia and Velletri 1535-1537)
• Andrea della Valle 1533-1534 (Bishop of Albano 1533)
• Bonifacio Ferreri 1534-1535, † 1543 (Bishop of Albano 1533-1534, of Sabina 1535-1537 and of Porto 1537-1543)
• Lorenzo II Campeggio 1535-1537, † 1539 (Bishop of Albano 1534-1535 and of Sabina 1537-1539)
• Antonio Sanseverino 1537-1539, † 1543 (Bishop of Sabina 1539-1543 and of Porto 1543)
• Giovanni Vincenzo Caraffa 1539-1541
• Alessandro II Cesarini 1541-1542
• Francesco III Cornaro 1542-1543
• Giovanni Maria Ciocchi del Monte 1543-1550
• Francois Louis de Bourbon de Vendome 1550-1557
• Federigo Cesi 1557-1562, † 1564
• Giovanni Morone 1562-1564, † 1580 (Bishop of Albano 1560-1561, of Sabina 1561-1562, of Frascati 1562, 1564-1565, of Porto 1565-1570 and of Ostia and Velletri 1570-1580)
• Cristoforo Madruzzo 1564-1570, † 1578 (Bishop of Albano 1561-1562, of Sabina 1562-1564 and of Porto 1570-1578)
• Otto Truchsess von Waldburg 1570-1573 (Bishop of Albano 1562-1570 and Sabina 1570)
• Giulio della Rovere 1573-1578 (Bishop of Albano 1570 and of Sabina 1570-1573)
• Giovanni Antonio Serbelloni 1578-1583, † 1591 (Bishop of Frascati 1583-1587, of Sabina 1578, of Porto 1587-1589 and of Ostia and Velletri 1589-1591)
• Giovanni Francesco I Gambara 1583-1587 (Bishop of Albano 1580-1583)
• Marco Antonio I Colonna 1587-1597
• Giulio Antonio Santori 1597-1602

1600-1800

• Alessandro Ottaviano de' Medici 1602-1605 (Bishop of Albano 1600-1602)
• Agostino Valeri 1605-1606
• Ascanio Colonna 1606-1608
• Antonio Maria Galli 1608-1611, † 1620 (Bishop of Frascati 1605-1608, of Porto 1611-1615 and of Ostia and Velletri 1615-1620)
• Gregorio Petrocchini de Montelbero 1611-1612
• Benedetto Giustiniani 1612-1615, † 1621 (Bishop of Sabina 1615-1620 and of Porto 1620-1621)
• Francesco Maria Cardinal Bourbon del Monte Santa Maria 1615-1621, † 1625 (Bishop of Porto 1621-1623 and of Ostia and Velletri 1623-1625)
• Ottavio Bandini 1621-1624, † 1629 (Bishop of Porto 1624-1626 and of Ostia and Velletri 1626-1629)
• Andrea III Baroni Peretti Montalto 1624-1626, † 1629 (Bishop of Albano 1626-1627 and of Frascati 1627-1629)
• Domenico Ginnasi 1626-1629, † 1639 (Bishop of Porto 1629-1630 and of Ostia 1630-1639)
• Marcello Lante della Rovere 1629, † 1652 (Bishop of Frascati 1629-1639, of Porto 1639-1641 and of Ostia 1641-1652)
• Pier Paolo Crescenti 1629-1641, † 1645 (Bishop of Porto 1641-1645)
• Guido IV. Bentivoglio 1641-1644
• Alfonso de la Cueva Albuquerque 1644-1655
• Bernardino Spada 1655-1661 (Bishop of Albano 1646-1652, of Frascati 1652 and of Sabina 1652-1655)
• Antonio Barberini 1661-1671 (Bishop of Frascati 1655-1661)
• Rinaldo d'Este 1671-1672
• Cesare Fachinetti 1672-1679, † 1683 (Bishop of Porto 1679-1680 and of Ostia and Velletri 1680-1683)
• Alderano Cybo 1679-1680, † 1700 (Bishop of Frascati 1680-1683, of Porto 1683-1687 and of Ostia and Velletri 1687-1700)
• Lorenzo III Raggi 1680-1687
• Antonio IV Bichi 1687-1691
• Paluzzo Paluzzi Altieri Degli Albertoni 1691-1698 (Bishop of Sabina 1689-1691)
• Luis Manuel Fernando Portocarrero 1698-1709
• Fabrizio Spada 1710-1717
• Francesco IV del Giudice 1717-1721 (Bishop of Frascati 1721-1724 and of Ostia and Velletri 1724-1725)
• Francesco Barberini 1721-1726, † 1738 (Bishop of Ostia and Velletri 1726-1738)
• Tommaso Ruffo 1726-1738, † 1753 (Bishop of Porto 1738-1740 and of Ostia and Velletri 1740-1753)
• Giorgio II Spinola 1738-1739
• Giovanni Battista Altieri 1739-1740
• Vincenzo I Petra 1740-1747
• Antonio Xaverio Gentilis 1747-1753
• Giuseppe Spinelli 1753-1759, † 1763 (Bishop of Porto 1759-1761 and of Ostia and Velletri 1761-1763)
• Federico Marcello Lante 1759-1763, † 1773 (Bishop of Porto 1763-1773)
• Giovanni Francesco II Stoppani 1763-1774
• Girolamo III Spinola 1775-1784
• Marcantonio Colonna 1784-1793
• Leonardo Antonelli 1794-1800, † 1811 (Bishop of Porto 1800-1807 and of Ostia and Velletri 1807-1811)

From 1800

• Alessandro Mattei 1800-1809, † 1820 (Bishop of Porto 1809-1814 and of Ostia and Velletri 1814-1820)
• Aurelio Roverella 1809-1812
• Diego Inigo Caracciolo di Martini 1814-1820
• Giuseppe Spina 1820-1828
• Francesco Bertazzoli 1828-1830
• Carlo Maria Pedicini 1830-1840, † 1843 (Bishop of Porto 1840-1843)
• Vincenzo Macchi 1840-1844, † 1860 (Bishop of Porto 1844-1847 and of Ostia and Velletri 1847-1860)
• Castruccio Castracane degli Anteliminelli 1844-1852
• Luigi Amato di San Filippo e Sorso 1852-1870, † 1877-1878 (Bishop of Porto 1871-1877, and of Ostia and Velletri 1877-1878)
• Carlo Sacconi 1870-1878, † 1889 (Bishop of Porto 1878-1884 and of Ostia and Velletri 1884-1889)
• Antonino de Luca 1878-1883
• Luigi Oreglia di Santo Stefano 1884-1889, † 1913 (Bishop of Porto 1889-1896 and of Ostia and Velletri 1896-1913)
• Angelo Bianchi 1889-1897
• Camillo Mazzella 1897-1900
• Vincenzo Vannutelli 1900-1930 (Bishop of Ostia 1915-1930)
• Luigi Sincero 1933-1936
• Angelo Dolci 1936-1939
• Carlo Salotti 1939-1947
• Benedetto Aloisi Masella 1948-1970
• Carlo Confalonieri 1972-1986 (Bishop of Ostia 1977-1986)
• Bernardin Gantin 1986-2008 (Bishop of Ostia 1993-2002)

Notes