The Kings of Connacht were rulers of the cóiced (variously translated as portion, fifth, province) of Connacht, which lies west of the River Shannon, Ireland. However, the name only became applied to it in the early medieval era, being named after The Connachta.
The old name for the province was Cóiced Ol nEchmacht (the fifth of the Ol nEchmacht). Ptolemy's map of c.150 A.D. does in fact list a people called the Nagnatae as living in the west of Ireland. Some are of the opinion that Ptolemy's Map of Ireland may be based on cartography carried out as much as five hundred years before his time.
The Connachta were a group of dynasties who claimed descent from the three eldest sons of Eochaid Mugmedon: Brion, Ailill and Fiachrae. They took their collective name from their alleged descent from Conn Cétchathach. Their younger brother, Niall Noigiallach was ancestor to the Uí Néill.
The following is a list of kings of Connacht from the fifth to fifteenth centuries. Biographical details will follow
Pre-Historic Kings of Ol nEchmacht
- Genann
- Conrac Cas
- Eochaid Feidlech
- Eochaidh Allat
- Tinni mac Conri
- Medb, Queen of Connacht
- Medb and Ailill mac Máta
- Maine Aithreamhail mac Ailill Máta
- Sanbh Sithcheann mac Ceat mac Magha
- Cairbre mac Maine Aithreamhail
- Eochaidh Fionn
- Aodh mac Cu Odhar
- Eochaidh mac Cairbre
- Aonghus Fionn mac Domhnall
- Cormac Ulfhada
- Aonghus Feirt mac Aonghus Fionn
- Connall Cruchain mac Aonghus Feirt
- Fearadach mac Connal Cruchain
- Forghus Fiansa
- Forghus Fiansa and Art mac Conn
- Ceidghin Cruchain mac Connall Cruchain
- Aodh mac Eochaidh
- Aodh Alainn mac Eochaidh Baicidh
- Nia Mor mac Lughna
- Lughaidh mac Lughna Fear Tri
- Aodh Caomh mac Garadh Glundubh
- Coinne mac Fear Tri
- Muireadh Tireach mac Fiachra Sraibrintne
- Eochaid Mugmedon
Historic Kings of Connacht
King | Clan Sept | Reign |
|---|---|---|
| Amalgaid mac Fiachrae | Uí Fiachrach | 406–440 |
| Nath Í | Uí Fiachrach | 440–445 |
| Ailill Molt | Uí Fiachrach | 445–482 |
| Dauí Tenga Uma | Uí Briúin | 482–500 |
| Eógan Bél | Uí Fiachrach | 500–542 |
| Ailill Inbanda | Uí Fiachrach | 542–549 |
| Echu Tirmcharna mac Fergu | Uí Briúin | 549–556 |
| Áed mac Echach Tirmcharna | Uí Briúin | 556–575 |
| Uatu mac Áedo mac Echach | Uí Briúin | 575–600 |
| Colmán mac Cobthaig | Uí Fiachrach Aidhne | 600–622 |
| Rogallach mac Uatach | Uí Briúin | 622–649 |
| Loingsech mac Colmáin | Uí Fiachrach Aidhne | 649–655 |
| Guaire Aidne mac Colmáin | Uí Fiachrach Aidhne | 655–663 |
| Cenn Fáelad mac Colgan | Uí Briúin Seóla | 663–682 |
| Dúnchad Muirisci mac Tipraite | Uí Fiachrach Muaidhe | 682–683 |
| Fergal Aidne mac Artgaile mac Guaire | Uí Fiachrach Aidhne | 683–696 |
| Muiredach Muillethan mac Fergusso mac Rogallaig | Uí Briúin Ai | 696–702 |
| Cellach mac Rogallach mac Uatach | Uí Briúin | 702–705 |
| Indrechtach mac Dúnchado Muirisci | Uí Fiachrach Muaidhe | 705–707 |
| Indrechtach mac Muiredaig Muillethan | Uí Briúin Síl Muiredaig | 707–723 |
| Domnall mac Cellaig mac Rogallach | Uí Briúin Síl Cellaig | 723–728 |
| Cathal mac Muiredaig Muillethan | Uí Briúin Síl Cellaig | 728–735 |
| Áed Balb mac Indrechtaig | Uí Briúin Síl Cellaig | 735–742 |
| Forggus mac Cellaig | Uí Briúin Síl Cellaig | 742–756 |
| Ailill Medraige mac Indrechtaig mac Dúnchado Muirisci | Uí Fiachrach Muaidhe | 756–764 |
| Dub-Indrecht mac Cathail | Uí Briúin Síl Cathail | 764–768 |
| Donn Cothaid mac Cathail | Uí Fiachrach Muaidhe | 768–773 |
| Flaithrí mac Domnaill | Uí Briúin Síl Cellaig | 773–777 |
| Artgal mac Cathail | Uí Briúin Síl Cathail | 777–782 |
| Tipraite mac Taidg | Uí Briúin Síl Muiredaig | 782–786 |
| Cináed mac Artgail | Uí Briúin Síl Cathail | 786–792 |
| Colla mac Fergusso | Uí Briúin Síl Cellaig | 792–796 |
| Muirgius mac Tommaltaig | Uí Briúin Síl Muiredaig | 796–815 |
| Diarmait mac Tommaltaig | Uí Briúin Síl Muiredaig | 815–833 |
| Cathal mac Muirgiussa | Uí Briúin Síl Muiredaig | 833–839 |
- Niall Noigiallach/Niall of the Nine Hostages, died c.450/455.
- Murchad mac Áedo, 839-840.
- Fergus mac Fothaid, 840-843.
- Finsnechta mac Tommaltaig, 843-848.
- Mugron mac Máel Cothaid, 848-872.
- Conchobar mac Taidg Mór, circa 855-882.
- Áed mac Conchobair, 882-888.
- Tadg mac Conchobair, 888-900.
- Cathal mac Conchobair, 900-925.
- Tadg mac Cathail, 925-956.
- Fergal Ua Ruairc, 956-967.
- Conchobar mac Tadg, 967-973.
- Cathal mac Tadg, d. 973.
- Cathal mac Conchobar mac Taidg, 973-1010.
- Tadg in Eich Gil Ua Conchobair, 1010-1030.
- Art Uallach Ua Ruairc, 1030-1046.
- Áed in Gai Bernaig Ua Conchobair, 1046-1067.
- Áed mac Art Uallach Ua Ruairc, 1067-1087.
- Ruaidrí na Saide Buide Ua Conchobair, 1087-1092; deposed.
- Flaithbertach Ua Flaithbertaig, d. 1098.
- Tadg mac Ruaidrí Ua Conchobair, d. 1097.
- Domnall mac Tigernáin Ua Ruairc, d. 1102.
- Domnall mac Ruaidrí Ua Conchobair, 1102-1106; deposed.
- Toirdelbach Mór mac Ruaidrí Ua Conchobair, 1106-1156.
Post Norman Invasion of Ireland
- Ruaidrí Ua Conchobair 1156-1186; deposed.
- Conchobar Máenmaige Ua Conchobhair, 1186-1189.
- Cathal Carragh Ua Conchobhair, 1190-1202.
- Cathal Crobderg Ua Conchobair, 1202-1224.
- Aedh mac Cathal Crobdearg Ua Conchobair, 1224-1228
- Aedh mac Ruaidri Ua Conchobair, 1228-1233.
- Felim mac Cathal Crobderg Ua Conchobair, 1233-1256
- Aedh mac Felim Ua Conchobair, 1256-1274
- Aedh Muimhnech mac Felim Ua Conchobair, 1274-1280
- Cathal mac Conchobair Ruadh Ua Conchobair, 1280-1288.
- Maghnus mac Conchobair Ruadh Ua Conchobair, 1288-1293
- Aedh mac Eoghan Ua Conchobair, 1293-1309
- Ruaidri mac Cathal Ua Conchobair, 1309-1310
- Felim mac Aedh Ua Conchobair, 1310-1316.
- Rory na-bhFeadh mac Donough Ua Conchobair, 1316-1317.
- Tairdelbach mac Aedh Ua Conchobair, first reign 1317-1318
- Cathal mac Domhnall Ua Conchobair, 1318-1324
- Tairdelbach mac Aedh Ua Conchobair, second reign, 1324-1350
- Aedh mac Aedh Breifneach Ua Conchobair, 1342-1342; died 1345.
- Aedh mac Tairdelbach Ua Conchobair,
- Ruaidri mac Tairdelbach Ua Conchobair, 1368-1384.
- Cathal mac Ruaidri Ua Conchobair, 1426-1439; last de facto King of Connacht.
De Jure Kings of Connacht: O'Conor Don
- Toirdhealbhach Óg Donn mac Aodha meic Toirdhealbhaigh, d. 9th December 1406.
- Cathal mac Ruaidhri Ó Conchobhair Donn, d. 19th March 1439.
- Aodh mac Toirdhealbhaigh Óig Ó Conchobhair Donn, d.15th May 1461.
- Feidhlimidh Geangcach mac Toirdhealbhaigh Óig Ó Conchobhair Donn, d. 1474.
- Tadhg mac Eoghain Ó Conchobhair Donn, d. 1476.
- Eoghan Caoch mac Feidhlimidh Gheangcaigh Ó Conchobhair Donn, d. 1485.
- Aodh Og mac Aodh Ó Conchobhair Donn, died ?
- Toirdhealbhach Óg mac Ruaidhri Ó Conchobhair Donn, d.1503
- Conchobhar mac Eoghain Chaoich Ó Conchobhair Donn, d.?
- Cairbre mac Eoghain Chaoich Ó Conchobhair Donn, d. 1546.
- Aodh mac Eoghain Chaoich Ó Conchobhair Donn, deposed 1550.
- Diarmaid mac Cairbre Ó Conchobhair Donn, d. 1585.
- Sir Hugh/Aedh Ó Conchobhair Donn, d. 1632.
- An Calbhach mac Aedh Ó Conchobhair Donn, d. 1654.
- Hugh Óg mac Aedh Ó Conchobhair Don, d. 1662.
- Major Owen O'Conor Don of Ballinagare, d.s.p.m. 1692
- Cathal Óg O'Conor Don of Ballinagare, d. 1696.
- Denis O'Conor Don, 1674-1750.
- Charles O'Conor Don, 1710-1791.
- Denis O'Conor Don of Gelangare, 1732-1804
- Owen O'Conor Don of Clonalis, 1763-1831
- Matthew O'Conor Don, 1773-1844; popularly inaugurated in 1830's.
- Denis O'Conor Don of Clonalis, 1794-1847
- Charles Owen O'Conor Don, 1838-1906.
- Charles O'Conor Don, 1869-1917.
- Owen Phelim O'Conor Don, 1870-1943
- Fr. Charles O'Conor Don, 1906-1981
- Denis O'Conor Don, 1912- July 10, 2000, aged 88.
- Desmond O'Conor Don; former banker and current Chairman of the British Chilean Chamber of Commerce.

