Ruairí Ó Murchú (Irish pronunciation: [ˈɾˠuəɾʲiː oː ˈmˠʊɾˠəxuː]; born 3 May 1978) is an Irish Sinn Féin politician who has been a Teachta Dála (TD) for the Louth constituency since the 2020 general election.

[1] He was a member of Louth County Council representing the Dundalk South local electoral area from 2017 to 2020, having been co-opted to replace Kevin Meenan who had stood down for personal reasons.

Ó Murchú was re-elected to Louth County Council in 2019.

Ó Murchú grew up in Knockbridge and holds degrees from Dublin City University in Computer Applications and Griffith College Dublin in Computing.

He lives in Bay Estate, Dundalk with his wife Annemarie Ó Murchú.