Liam Seán MacDaid (19 July 1945 – 15 August 2023) was an Irish Roman Catholic prelate who served as Bishop of Clogher between 2010 and 2016.

MacDaid had a keen interest in Gaelic games, playing for St Joseph's GFC at club level and some Donegal county teams in the early 1970s.

[5] MacDaid was consecrated by the Archbishop of Armagh and Primate of All Ireland, Seán Brady, on 25 July at St Macartan's Cathedral, Monaghan.

[8][2] MacDaid joined a number of other bishops in releasing a statement on 8 June 2016, ahead of a referendum in the United Kingdom on its membership of the European Union, warning against the impact of a potential Brexit on the peace process in Northern Ireland.

[9] It was announced on 1 October 2016 that McDaid had tendered his resignation on medical grounds to Pope Francis some months previously, and that it had been with immediate effect.