Lord Augustus FitzRoy (16 October 1716 – 24 May 1741) was a British officer of the Royal Navy.
He served during the War of the Austrian Succession, and was involved in the capture of the Spanish ship of the line, Princesa, a major prize in the war.
He was also the father of Augustus FitzRoy, 3rd Duke of Grafton, who became Prime Minister of Great Britain.