Henry Pacey (c.1669–1729), of Boston, Lincolnshire, was a British politician who sat in the House of Commons from 1722 to 1729.
Pacey was the eldest son of Richard Pacey yeoman of West Keal and Bolingbroke, Lincolnshire, and his wife Catherine Butler, daughter of Colonel John Butler of Hundelby Lincolnshire.
3 April 1716 aad he married secondly to Cassandra Pindar of Kempley, Gloucestershire.
He was Mayor of Boston in 1708 and was appointed deputy recorder in 1709, holding the post until 1715.
In 1711 he was appointed Receiver of land tax for part of Lincolnshire and judge of Admiralty at Boston.