The O Conor Sligo (O Conchobhair Sligigh) were a branch of the O Conchobhair royal family who were Kings of Connacht. They were descended from Brian Luighnech O Conchobhair (k.1181) and were Lords of Sligo into the 17th century.
- Cathal mac Domnaill O Conchobhair Sligo. 1318-1324.
- Murichertach mac Domnaill O Conchobhair Sligo, 1324-1329
- Maghnus mac Cathail O Conchobhair Sligo, 1329-1342.
- Cathal Og mac Cathail O Conchobhair Sligo, 1342-3rd November 1362.
- Tadhg mac Maghnusa O Conchobhair Sligo,, 1362-1368.
- Domhnall mac Muircheartaigh O Conchobhair Sligo, 1368-18th December 1395.
- Muircheartach Bacach mac Domhnaill O Conchobhair Sligo, 1395-1403.
- Brian mac Domhnaill O Conchobhair Sligo, 1403-1440.
- Eoghan mac Domhnaill O Conchobhair Sligo, 1440-1444.
- Toirdhealbhach Carrach mac Domhnaill O Conchobhair Sligo, 1444-1455.
- Maghnus mac Briain O Conchobhair Sligo, 1455-1461.
- Tadhg mac Eoghain O Conchobhair Sligo, 1461-1462.
- Domhnall mac Muircheartaigh Bhachaigh O Conchobhair Sligo, 1462-1464.
- Ruaidhri mac Briain O Conchobhair Sligo, 1464-1478?
- Domhnall mac Eoghain O Conchobhair Sligo, 1478?-14th March 1494.
- Ruaidhri mac Toirdhealbhaigh Carraigh O Conchobhair Sligo, 1494-1495
- Ruaidhri Og mac Ruaidhri Bhallaigh O Conchobhair Sligo, 1495-1495.
- Feidhlimidh mac Maghnusa O Conchobhair Sligo, 1495-1519
- Tadhg Og mac Tadhg O Conchobhair Sligo, 1533.
- Tadhg mac Cathail Oig O Conchobhair Sligo, 1533-1545. 1545-1552
- Ruaidhri mac Feidhlimidh O Conchobhair Sligo, 1545-1552. 1552-
- Sir Domnhnall O Conchobhair Sligo, c.1556-1588.
- Sir Donnchadh O Conchobhair Sligo, 1588-1609.
- Sir An Calbhach O Conchobhair Sligo, 1609-1625.
- Donnchadh mac Domhnaill O Conchobhair Sligo, 1625-1634.
