Dame Katherine Patricia Routledge (/ˈraʊtlɪdʒ/ ROWT-lij; 17 February 1929 – 3 October 2025) was an English actress and singer. She was best known for her comedy role as Hyacinth Bucket in the BBC sitcom Keeping Up Appearances, for which she was twice nominated for the BAFTA TV Award for Best Light Entertainment Performance.

Routledge made her professional stage debut at the Liverpool Playhouse in 1952 and her West End debut in The Love Doctor in 1959. Making her Broadway debut in How's the World Treating You in 1966, she won the 1968 Tony Award for Best Actress in a Musical for her role in Darling of the Day. She received the 1988 Olivier Award for Best Actress in a Musical for Candide at the Old Vic. Her film appearances include To Sir, with Love (1967) and Don't Raise the Bridge, Lower the River (1968).

On television, Routledge came to prominence during the 1980s in monologues written by Alan Bennett and Victoria Wood; appearing in Bennett's A Woman of No Importance (1982), as Kitty in Victoria Wood: As Seen on TV (1985–1986) and being nominated for the BAFTA TV Award for Best Actress for Bennett's Talking Heads: A Lady of Letters (1988). She also starred as Hetty Wainthropp in the British television series Hetty Wainthropp Investigates (1990, 1996–1998). In 2017, she was made a dame by Queen Elizabeth II for her services to entertainment and charity.