Marquess of Dorchester (1645)

==Holders==
 	From 	Until 	Name 	Lifespan
1.	25 March 1645	8 December 1680	The Most Hon. Henry Pierrepont, 1st Marquess of Dorchester, P.C.	1607-1680
==Other Titles==
===Peerage of England===
*Earl of Kingston-upon-Hull (1628), 1645-1680
*Viscount Newark (1627), 1645-1680
*Baron Pierrepont (1627), 1645-1680