Sir George Duckett, 1st Baronet (24 October 1725 – 22 December 1822) was a British naval administrator and politician.
Born George Jackson, probably in Yorkshire, the third but oldest surviving son of George Jackson (1687/8–1758) of Hill House, Richmond, Yorkshire, and Ellerton Abbey, Yorkshire, and Hannah, daughter of William Ward of Guisborough, Yorkshire. He sat as Member of Parliament (MP) for Weymouth & Melcombe Regis from 1786 to 1788, and for Colchester from 1790 to 1796. He was created a baronet on 21 June 1791.
Jackson was made Deputy Secretary to The Admiralty in 1766 and appointed Judge Advocate of the Fleet in 1768. In this capacity he was largely responsible for the conduct of the court martial of Admiral Lord Keppel in 1779 and the subsequent enquiry into the evidence of Sir Hugh Palliser. Jackson resigned from the secretaryship in 1782 but remained Judge Advocate until his death.
He was a friend and patron of Captain James Cook. In his honour, Captain Cook named both Cape Jackson in New Zealand, and Port Jackson in New South Wales, Australia. He was interested in improving inland waterways, 1st Baronet. He was succeeded in the baronetcy by his son George.