| Bishops of Lismore |
| From |
Until |
Incumbent |
Notes |
| unknown |
1113 |
Niall mac Meic Áedacáin |
Died in office |
| unknown |
1119 |
Ua Daighthig |
Died in office |
| unknown |
1135 |
Máel Ísu Ua hAinmere, O.S.B. |
Probably was bishop of Lismore and Waterford during the last years of his life; died in office; also known as Malchus |
| 1135 |
c.1151 |
Máel Muire Ua Loingsig |
Probably resigned circa 1151; his death is recorded in the Annals of Ulster in 1159 |
| 1151 |
c.1179 |
Gilla Críst Ua Connairche, O.Cist. |
Consecrated in 1151; resigned circa 1179; died 1186; first Abbot of Mellifont; he is said to have been the first papal legate in Ireland; also known as Christianus |
| c.1179 |
1202 |
Felix |
Elected circa 1179; attended the Third Council of the Lateran in 1179; resigned 1202 |
| 1203 |
bef.1216 |
Malachias, O.Cist. |
Elected circa 1202 and consecrated before 5 November 1203; died before 1216 |
| 1216 |
1218 |
Thomas |
Elected and consecrated before June 1216; died before December 1218 |
| 1218 |
1223 |
Robert of Bedford |
Formerly Bishop-elect of Glendalough; elected Bishop of Lismore before 13 December 1218 and received possession of the temporalities on that date; consecrated before 17 April 1219; died before November 1223 |
| 1228 |
1246 |
Griffin Christopher |
Elected before 6 November 1223 and received possession of the temporalities on that date; received the temporalities again from the king on 8 July 1225 and again 11 July 1227; consecrated before 25 April 1228; resigned sometime between 17 July and 8 August 1246; died after 22 August 1252 |
| 1246/48 |
1253 |
Ailinn Ó Súilleabáin, O.P. |
Translated from Cloyne after 26 October 1246, but did receive possession of the see's temporalities until 25 May 1248; died before 27 April 1253; also known as Alan O'Sullivan |
| 1253 |
1270 |
Thomas |
Elected before 25 July 1253; received possession of the temporalities after 27 July 1253; consecrated after 15 October 1253; died before 2 July 1270 |
| 1270 |
1279 |
John Roche |
Elected before 20 August 1270 and received possession of the temporalities after that date; died 11 June 1279; also known as John de Rupe |
| 1280 |
1308 |
Richard Corre |
Elected 19 July and consecrated after 24 October 1279; received possession of the temporalities 11 November 1279; died in October 1308 |
| 1309 |
1321 |
William Fleming |
Elected after 24 November 1308; died in November 1321; also known as William le Fleming |
| 1321 |
1354 |
John Leynagh |
Elected after 13 December 1321 and consecrated 17 April 1323; died in December 1354; also known as John Launaught |
| 1354 |
1358 |
See vacant |
During this vacancy, King Edward III ordered the temporalities of Lismore to be delivered to Roger Cradock, Bishop of Waterford, however, this was not done. |
| 1358 |
1363 |
Thomas le Reve |
Appointed 18 May 1358 and received possession of the temporalities 24 August 1358; became Bishop of Waterford and Lismore on 16 June 1363 when Pope Urban V united the two dioceses |
| In 1363, Lismore united with Waterford to form the united bishopric of Waterford and Lismore |
| Source(s):[1][2][3] |