Duke of Cumberland and Strathearn was a title in the Peerage of Great Britain that was conferred upon a member of the British royal family.

The title of Duke of Cumberland had been created three times in the Peerages of England and Great Britain.

The title of Duke of Cumberland and Strathearn was created on 22 October 1766 in the Peerage of Great Britain.

The title of Duke of Cumberland and Teviotdale was later created in the Peerage of Great Britain.

Cumberland is a historic county of England, while the title Strathearn referred to the strath (valley) of the River Earn in Scotland; the ancient title Earl/Mormaer of Strathearn died out in the 15th century.