Pieter de Graeff (15 August 1638 – 3 June 1707), was a member of the De Graeff-family from the Dutch Golden Age. He was an Amsterdam Regent during the late 1660s and the early 1670s, and held the titles as Lord of the semi-sovereign Fief Zuid-Polsbroek and 19.th Lord of the Free and high Fief Ilpendam and Purmerland. Pieter de Graeff was a member of a family of regents who belonged to the republican political movement also referred to as the ‘state oriented’, as opposed to the Royalists.