The title of Marquess of Dufferin and Ava is a hereditary peerage in the British nobility. It was created in 1878 for Frederick Hamilton-Temple-Blackwood, who served as Governor General of Canada and held various other significant positions in the British Empire. The title is associated with the family estate of Clandeboye in Northern Ireland. The Marquessate is part of the Peerage of the United Kingdom and has been passed down through generations. The current holder, as of 2023, is David Hamilton-Temple-Blackwood, the 5th Marquess. The family has a rich history, contributing to both British society and colonial administration.