Judith Marilyn Maddigan (born 3 February 1948), Australian politician, was Speaker of the Victorian Legislative Assembly from 2003-2005. She was the member for the seat of Essendon from 1996 to 2010, representing the Australian Labor Party.
Maddigan was born Judith Todd in Melbourne, and was educated at Tintern Grammar and the University of Melbourne. She was a librarian before entering politics. She is the first woman Speaker of the Legislative Assembly.