Walter Palk (1742-1819), of Marley House in the parish of Rattery, Devon, was a Member of Parliament for his family's Pocket Borough of Ashburton in Devon from 1796 to 1811. He served as Sheriff of Devon (1791-2) and in 1798 was a Captain in the Ashburton Volunteer Militia, one of many such units formed across Devon to counter a possible invasion by Napoleon.
He was the eldest son of Walter Palk (d.1801) of Headborough and Yolland Hill, in the parish of Ashburton, a small farmer and clothier, by his first wife Thomasine Withecombe of Priestaford, Ashburton. His uncle was the wealthy Sir Robert Palk, 1st Baronet (1717-1798) of Haldon House in the parish of Kenn, in Devon, an officer of the British East India Company who served as Governor of the Madras Presidency, later a MP for Ashburton in 1767 and between 1774 and 1787 and for Wareham, between 1768 and 1774.
Shortly before 1810 he purchased the manor of Rattery together with several local estates, and built Marley House, a large Georgian country house, as his new seat within the parish of Rattery.
On 15 February 1782 he married Elizabeth Lyde, by whom he had two daughters, only one of whom survived: