The Duchess of Cornwall is a title held by the wife of the heir apparent to the British throne.

The Duchess of Cornwall is usually also the Princess of Wales, and she uses that title.

The current title-holder is Catherine (née Middleton), whose husband, Prince William (later Prince of Wales), became the Duke of Cornwall on 8 September 2022, upon the death of his grandmother Queen Elizabeth II.

[1] Previously, Catherine's stepmother-in-law, Queen Camilla, was known by this title.

Until her husband's accession to the throne, Camilla, the second wife of the then-Prince of Wales, used the title "Duchess of Cornwall" rather than "Princess of Wales", as the latter was still popularly associated with Charles's first wife, Diana, who died in 1997.