Henry Bishopp, (1611–1691/2), also spelt Bishop and Bisshopp, from Henfield in Sussex, England was a Postmaster General of England and inventor of the first postmark used on mail. He was the second son of Sir Thomas Bishopp, 1st Baronet of Parham in Sussex. Henry at first fought for King Charles I, but was reconciled with parliament in 1647, after spending two years in Virginia. In the meantime his Rectory estate in Henfield had been sequestered. However, he was restored to royal favour in 1660 and served as postmaster-general between that date and 1663. At his death in 1692 his Rectory estate in Henfield passed to his great-nephew Sir Cecil Bishopp, 4th Baronet.
Before the creation of the position of Postmaster General, control of the post was in the hands of "Master of the King's Post". In 1660, at The Restoration, Henry Bishop paid £21,500 per year to farm the Post Office for a term of seven years. This was more than double the previous payment. Bishop's letters patent gave him the monopoly to carry letters within the kingdom. His appointment was to start on 25 June 1660, but was delayed until 29 September when the Act of Parliament reconstituted the General Post Office. Bishop claimed no less than £500 in compensation for the loss of income because several independent posts had been started between London and the country but were not suppressed until the act was passed; they infringed on his monopoly to carry letters.
Bishop was the first officially appointed Postmaster General to Charles II but within a year of taking office he was accused of abuses. In reply, he mentions the improvements he instigated including the stamping of letters, on 2 August 1661. He served in the position until April 1663 at which time he gave up the remainder of his lease to Daniel O'Neill.