Hugh Hyacinth O'Rorke MacDermot, Prince of Coolavin PC, JP, DL, QC (1 July 1834 – 6 February 1904), was an Irish lawyer.
He unsuccessfully contested the parliamentary constituency of West Derbyshire at the 1892 United Kingdom general election.
He served as Attorney-General for Ireland in 1892, when he was made a member of the Irish Privy Council.
He succeeded his father 5 September 1873 as The Mac Dermot, Prince of Coolavin.
[1] His grandson (by his fourth son, Henry) Niall MacDermot was a British Labour MP and junior minister between 1957 and 1970.