| Tenure |
Incumbent |
Notes |
| 1152–1161 |
Áed Ua h-Oissín |
Called Edanus. |
| 1167–1201 |
Cadla Ua Dubthaig |
Called Catholicus. |
| 1202–1235 |
Felix Ua Ruanada |
Died 1238. |
| 1236–1249 |
Máel Muire Ó Lachtáin |
Called Marianus. |
| 1250–1256 |
Flann Mac Flainn |
Called Florentius. |
| 1257–1258 |
Walter de Saleron |
|
| 1258–1279 |
Tommaltach Ó Conchobair |
Called Thomas; previously Bishop of Elphin. |
| el. 1283 |
Nicol Mac Flainn |
Never consecrated |
| 1286–1288 |
Stephen de Fulbourn |
Previously Bishop of Waterford. |
| 1288–1312 |
William de Bermingham |
|
| 1312–1348 |
Máel Sechlain Mac Áeda |
Previously Bishop of Elphin. |
| 1348–1365 |
Tomás MacCearbhaill |
Translated to archbishopric of Cashel in 1365. |
| 1364–1371 |
Eóin Ó Gráda |
|
| 1372–1383 |
Gregorius Ó Mocháin I |
Previously Bishop of Elphin. |
| 1384–1386 |
Gregorius Ó Mocháin II |
Deprived by Pope Urban VI; died 1392. |
| 1386–1393 |
Uilliam Ó Cormacáin |
Translated to bishopric of Clonfert in 1393. |
| 1393–1407 |
Muircheartach mac Pilib Ó Ceallaigh |
Previously Bishop of Clonfert. |
| 1408–1410 |
John Babingle |
Translated to bishopric of Anchory. |
| provided 1411 |
Cornelius |
Provision of 1411 never took effect. |
| 1430–1437 |
John Bermingham |
|
| 1438–1441 |
Tomás mac Muircheartaigh Ó Ceallaigh |
Translated from bishopric of Confert. |
| 1441–1450 |
John de Burgo |
|
| 1450–1485 |
Donatus Ó Muireadhaigh |
Called also Donatus O'Murray. |
| provided 1483 |
Walter Blake |
Provision did not take effect, and was translated to Clonmacnoise in 1487. |
| 1485–1501 |
William Joyce |
|
| Provided 1503 |
Philip Pinson |
Provision of 1503 unfruitful. |
| 1506–1513 |
Muiris Ó Fithcheallaigh |
Also called Maurice O'Fihely or Maurice de Portu. |
| 1514–1536 |
Thomas O'Mullally |
Previously Bishop of Clonmacnoise. Irish: Tomás Ó Maolalaidh. |
| Tenure |
Incumbent |
Notes |
| 1514–1536 |
Thomas O'Mullally |
Previously Bishop of Clonmacnoise. Irish: Tomás Ó Maolalaidh. |
| provided 1538 |
Arthur O'Friel |
Unable to get possession from Bodkin. |
| 1555–1572 |
Christopher Bodkin |
|
| 1580–1583 |
Nicholas Skerrett |
|
| 1586–1590 |
Miler O'Higgin |
|
| 1591–1595 |
James O'Hely |
|
| 1609–1629 |
Florence Conry |
|
| 1630–1645 |
Malachy O'Queely |
Called also Malachias O'Queely. |
| 1647–1667 |
John de Burgo |
Previously Bishop of Clonfert. Irish: Tomás Ó Maolalaidh. |
| 1669–1713 |
James Lynch |
|
| 1713–1723 |
Francis de Burgo |
|
| 1723–1740 |
Bernard O'Gara |
|
| 1740–1748 |
Michael O'Gara |
|
| 1749–1785 |
Michael Skerrett |
Previously Bishop of Killala. |
| 1785–1787 |
Philip Philips |
Previously Bishop of Anchory. |
| 1787–1798 |
Boetius Egan |
Previously Bishop of Anchory. |
| 1798–1809 |
Edward Dillon |
|
| 1815–1834 |
Oliver O'Kelly |
|
| 1834–1881 |
John MacHale |
Previously Bishop of Killala. |
| 1878/81–1902 |
John MacEvily |
Previously Bishop of Galway. Coadjutor since 1878, succeeded 1881. |
| 1903–1918 |
John Healy |
Previously Bishop of Clonfert. |
| 1918–1939 |
Thomas Gilmartin |
Previously Bishop of Clonfert. |
| 1940–1969 |
Joseph Walsh |
|
| 1969–1987 |
Joseph Cannane |
|
| 1987–1994 |
Joseph Cassidy |
|
| 1995–present |
Michael Neary |
|