Edward Macnaghten, Baron Macnaghten, GCB, GCMG, PC (3 February 1830 – 17 February 1913) was an Anglo-Irish rower, barrister, Conservative-Unionist politician and law lord.
Macnaghten was born in Bloomsbury, London, the second son of Sir Edmund Workman-Macnaghten, Bt., but grew up mainly at Roe Park, Limavady. He attended school in Sunderland and then Trinity College, Dublin, and Trinity College, Cambridge, graduating Bachelor of Arts in 1852. At Cambridge, he was secretary of the Pitt Club.
Macnaghten was a rower at Cambridge. In 1851, he was runner up to E. G. Peacock in the Diamond Challenge Sculls at Henley Royal Regatta, but avenged this the following year with a win. Macnaghten rowed bow for Cambridge in the Oxford and Cambridge Boat Race in 1852 which was won by Oxford. Also in 1852, he turned the tables on Peacock to win the Diamond Challenge Sculls from him at Henley.