Lady Augusta De Ameland (born Murray; 27 January 1761[1] – 4 March 1830) was a Scottish aristocrat and the first wife of Prince Augustus Frederick, Duke of Sussex, the sixth son of George III.

Their union was in contravention of the Royal Marriages Act 1772 because the Prince had not asked his father's permission, so she was not legally recognised as his wife.

[2] Lady Augusta secretly married Prince Augustus Frederick, sixth son of King George III, on 4 April 1793 in a Church of England ceremony in her lodgings at Hotel Sarmiento, Rome.

[2] They were married again on 5 December 1793 in St George's, Hanover Square, London, using their correct names but without revealing their full identities.

[3] Lady Augusta had a home at 1 Connaught Place, built for her in 1807 by her brother-in-law, Prince William Frederick, Duke of Gloucester and Edinburgh.