Sir Rigby Philip Watson Swift (7 June 1874 – 19 October 1937) was a British barrister, Member of Parliament and judge. Born into a legal family, Swift was educated at Parkfield School before taking up a place in his father's chambers and at the same time studying for his LLB at the University of London. After completing his degree in January 1895 he was called to the Bar at Lincoln's Inn on 26 June. He took up a place in his father's chambers, and his work steadily increased. After the death of his father on 26 September 1899 he took over the chambers, and by 1904 he was earning 3,000 guineas a year.