Fáelán mac Forbasaig (died 786) was a King of Osraige in modern County Kilkenny.
He was of the dynasty that ruled over Osraige in the early Christian period known as the Dál Birn and was the son of Forbasach mac Ailella (died 740), a previous king.
[citation needed] The Osraige plunged into civil war after the death of Anmchad mac Con Cherca circa 761.
In 786 the annals record that Fáelán was slain in internal conflict among the Osraige.
[1] This biography of a member of an Irish royal house is a stub.