Henry Pierrepont, 1st Marquess of Dorchester, PC, FRS, FRCP (March 16068 December 1680) was an English peer. He was the son of Robert Pierrepont, 1st Earl of Kingston-upon-Hull, and his wife, the former Gertrude Talbot, daughter of George Talbot and Elizabeth Reyner, and cousin of the Earl of Shrewsbury. He was born in Mansfield, Nottinghamshire.
Career
Styled Viscount Newark from 1628, he was the Member of Parliament for Nottingham from 1628 until 1629, and was summoned to the House of Lords in his father's Barony of Pierrepont in 1641. He succeeded his father as 2nd Earl of Kingston-upon-Hull in 1643.
Marriages and children
He married first Cecilia Bayning, a daughter of Paul Bayning, 1st Viscount Bayning, and his wife Anne Glemham, daughter of Sir Henry Glemham. They had four children:
- Lady Anne Pierrepont (born 9 March 1630) married John Manners, future Duke of Rutland. In an unprecedented step, Manners was granted a divorce by an Act of Parliament in 1670.
- Grace Pierrepont
- Henry Pierrepont (died 1649)
- Robert Pierrepont
He was secondly married to Lady Catherine Stanley, a daughter of James Stanley, 7th Earl of Derby and Charlotte Stanley, Countess of Derby. This marriage was childless.
Dorchester survived his sons, and when he died in London on 8 December 1680, the Marquessate of Dorchester became extinct. He was succeeded as 3rd Earl of Kingston-upon-Hull by Robert (died 1682), a son of Robert Pierrepont of Thoresby, Nottinghamshire, and as 4th Earl by Robert's brother William (died 1690).