Hewlett is a surname. Notable people with the surname include:
Arthur Hewlett, actor
David Hewlett, British-born Canadian actor, writer, director and voice actor
Donald Hewlett, actor
Hilda Hewlett, aviation pioneer, wife of Maurice Hewlett
Jamie Hewlett, comic book artist
Kate Hewlett, actress and David Hewlett's younger sister
Mark Hewlett, media personality
Matthew Hewlett, footballer
Maurice Hewlett, author, husband of Hilda Hewlett
Richard G. Hewlett, historian
Siobhan Hewlett, actress
W. H. Hewlett, composer, conductor, and organist
William Redington Hewlett, co-founder of Hewlett-Packard
William Hewlett (regicide)
