Fergal Ua Ruairc (died 967) was King of Connacht, Ireland. The annals state that, in 961, he won the battle of Catinchi.
- Leabhar na nGenealach, Dublin, 2004-2005
- Annals of the Four Masters, ed. John O'Donovan, Dublin, 1856
- Annals of Lough Ce, ed. W.M. Hennessey, London, 1871.
- Irish Kings and High Kings, Francis John Byrne, 3rd revised edition, Dublin: Four Courts Press, 2001. ISBN 978-1-85182-196-9
- "Ua Ruairc", in Seán Duffy (ed.), Medieval Ireland: An Encyclopedia. Routledge. 2005. pp.