Seán na Ráithíneach Ó Murchadha (1700 - 1762) was a poet and scribe from Carrignavar, County Cork. Ó Murchadha was an important scribe and collector of manuscripts. At least sixteen of his manuscripts from the period 1719 to 1762 are extant. These are to be found in the Royal Irish Academy, British Library, National Library of Ireland and the university libraries of Maynooth University and University College Cork. The oldest extant copy of Parlaimint na mBan was transcribed by him in 1723. This same manuscript also contains the oldest copies of Agallamh na bhFíoraon and of Fr Conchubhar Mac Cairteáin's sermons. In 1725 he copied poetry and prose stories from a manuscript by Dáibhí Ó Bruadair. He also composed a lament for Ó Bruadair's son, Uilliam, who died on 1 January 1729.