William Dudley OBE RDI is a British theatre designer.
Dudley is the son of William Stuart Dudley and his wife Dorothy Irene. He was educated at Saint Martin's School of Art and the Slade School of Art. He is a member of the Society of British Theatre Designers. He is married to the theatre director Lucy Bailey.
National Life Stories conducted an oral history interview with Dudley in 2007–2008 for its An Oral History of Theatre Design collection held by the British Library.