Sir Samuel Ongley (1647-1726), of Old Warden, Bedfordshire and Mincing Lane, London, was an English politician.

Born in Maidstone, Kent, he became a London merchant. In 1698 he purchased the Old Warden Estate from Paulet St John, Earl of Bolingbroke. ^[1] He was appointed High Sheriff of Bedfordshire for 1703.

He was a Member (MP) of the Parliament of Great Britain for Maidstone 1713 to 1715. He was knighted in 1713.^[2]

He died unmarried in 1726, leaving his estate to his nephew, also Samuel Ongley.