John Bampfylde (8 April 1691 – 17 September 1750) of Hestercombe in Somerset, was an English politician from Devon, who served as Member of Parliament for Exeter, Devon (1715–1722) and for the County of Devon (1736–1741).
He was the second son of Col. Hugh Bampfield (d.1690), (eldest son and heir apparent of Sir Coplestone Bampfylde, 2nd Baronet (c. 1633–1692) of Poltimore and North Molton, Devon, whom he predeceased) by his wife Mary Clifford, daughter of James Clifford of Ware. His elder brother was Sir Coplestone Bampfylde, 3rd Baronet (c. 1689–1727) of Poltimore. The Bampfield family had been seated at Poltimore since about 1300.
He married twice:
He inherited Hestercombe House from his father-in-law in 1718 and began to lay out gardens there. The present gardens are largely the work of his son.