Thomas Rymer (c. 1643 – 13 December 1713), English historiographer royal, was the younger son of Ralph Rymer, lord of the manor of Brafferton in Yorkshire, described by Clarendon as possessed of a good estate, who was executed for his share in the Presbyterian rising of 1663.
Rymer's most lasting contribution to scholarship was the sixteen volumes of Foedera he published from 1704 to 1713; a collection of "all the leagues, treaties, alliances, capitulations, and confederacies, which have at any time been made between the Crown of England and any other kingdoms, princes and states," it was an immense labor of research and transcription on which he spent the last twenty years of his life.
Rymer died on 13 December 1713, and was buried four days later in St Clement Danes Church in the Strand. He apparently left no immediate family.