Marquessate of Truro and St. Austell

An hereditary title in the Peerage of Great Britain held by the Montague family. The current Marquess is Owen Montague, 4th Marquess of Truro and St. Austell. The heir apparent holds the courtesy title of Earl of Auster. Their principal seat is Chauncery Castle in Cornwall.

The late elder sister of Lord Truro was the current Lord Hunstanton's wife.