The Marquess of Newcastle is a title in the British peerage, created in 1628. It is associated with the city of Newcastle upon Tyne and has been held by various noble families over the centuries. The title is part of the wider system of aristocracy in the United Kingdom, which includes other ranks such as duke, earl, and viscount. The title has been held by notable figures, including the Cavendish family, who played significant roles in British history. The Marquessate has often been linked to political influence and land ownership, reflecting the historical importance of the nobility in England's governance and society.