Sandy Powell (born April 7, 1960) is a British costume designer.
She has won the Academy Award for Costume Design for Shakespeare in Love (1998), The Aviator (2004), and The Young Victoria (2009), and has been nominated 12 times for the award. She has also received 13 BAFTA Award nominations, winning for Velvet Goldmine and The Young Victoria. She won many other awards in costume design for the latter film. Powell is often associated with Martin Scorsese and Todd Haynes, having designed the costumes for six of Scorsese’s films and three of Haynes’.