Dame Margaret Georgina Constance Guilfoyle, AC, DBE (née McCarthy; born 15 May 1926) is a British-born Australian who was a Senator for the state of Victoria from 1971 to 1987. She was the third woman to receive a federal ministerial portfolio, after Dame Enid Lyons and Dame Annabelle Rankin. Following her retirement she has continued to serve the Australian public through numerous boards and directorships.Guilfoyle was born in Belfast, Northern Ireland as Margaret Georgina Constance McCarthy.