Katherine Dienes (born in Wellington, 10 January 1970) is a New Zealand-born organist, conductor and composer.
She is currently Organist and Master of the Choristers at Guildford Cathedral and is the first woman to hold the most senior musical post in a Church of England cathedral.
Her husband is Patrick Williams, librarian of the Royal Phillharmonic Orchestra, and they have a daughter, Hannah, who is currently a chorister at Guildford Cathedral.