Admiral Sir Reginald John James George Macdonald (19 October 1820 – 15 December 1899) was a Royal Navy officer who went on to be Commander-in-Chief, East Indies Station.
Macdonald was born in Westminster, the son of Reginald George MacDonald, chief of Clan Ranald, and Lady Caroline Anne Edgcumbe, daughter of Richard Edgcumbe, 2nd Earl of Mount Edgcumbe.