List of marquessates in the peerages of Britain and Ireland

This article lists all marquessates, extant, extinct, dormant, abeyant, or forfeit, in the peerages of England, Scotland, Great Britain, Ireland, and the United Kingdom. The title of Marquess of Dublin, which is perhaps best described as Anglo-Irish, was the first to be created, in 1385, but like the next few creations, the title was soon forfeit.