Sir Patrick Alexander Macnaghten, 11th Baronet, DL (24 January 1927 – 22 August 2007) was a British baronet and Chief of the Clan Macnaghten. Sir Patrick was educated at Eton College and Trinity College, Cambridge and worked as an engineer and manager with Cadbury's Chocolate. He succeeded to the Baronetcy and as Chief of the Name and Arms of the Clan Macnaghten in 1972. In his retirement he lived at the estate of his ancestral home Dundarave which he ran until 2005. He was a Deputy Lieutenant and Vice President of the Northern Ireland Ploughing Association. Sir Patrick was a member of the .