Admiral Sir Samuel Pym KCB (1778–1855) was a British admiral, brother of Sir William Pym. In June 1788, Pym joined the Royal Navy as captain's servant of the frigate Eurydice. He was promoted to lieutenant of the sloop Martin, under Captain William Grenville Lobb, and served under Lobb aboard the Babet and the . From November 1798, Pym served aboard the Ethalion (36), taking part in the capture of the Spanish Thetis and Santa-Brigida in 1799. The Ethalion was wrecked on the Penmarks on Christmas Day.