Sandy Powell (born 7 April 1960) is a British costume designer.
She has been nominated for the Academy Award for Best Costume Design fourteen times, winning three awards for the films Shakespeare in Love (1998), The Aviator (2004), and The Young Victoria (2009).
She has also received fifteen BAFTA Award nominations, winning for Velvet Goldmine, The Young Victoria, and The Favourite.
Powell has been a frequent collaborator with directors Martin Scorsese and Todd Haynes, having designed the costumes for seven of Scorsese's films and four of Haynes's.Powell left Central School of Art in London, before completing her degree, due to offers of work from, amongst others, Derek Jarman.
She was appointed Officer of the Order of the British Empire (OBE) in the 2011 New Year Honours for services to the film industry.