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 Aimable.
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.
From April 1804, Pym served aboard the Mars, and from June on the 74-gun Atlas, under the overall command of Sir John Thomas Duckworth. Pym was decorated after the Battle of San Domingo, on 6 February 1806.
In October 1808, Pym took command of the 36-gun frigate Sirius, in the squadron of Commodore Rowley.
In 1810, Pym was sent to the Isle de France (now Mauritius) to lead a squadron consisting of the frigates Sirius, Iphigenia, Nereide, and the brig Staunch. On 13 August, the squadron captured the Île de la Passe which commanded the entrance of Grand Port, and moved to blockade Port Louis. On 21 August, the squadron seized the East Indiaman Wyndham, previously captured by the French, and learnt that a French frigate squadron had arrived at Grand Port.