Barbara Smoker (2 June 1923 – 7 April 2020) was a British humanist activist and freethought advocate. She was also President of the National Secular Society (1972–1996), Chair of the British Voluntary Euthanasia Society (now known as Dignity in Dying) (1981–1985) and an Honorary Vice President of the Gay and Lesbian Humanist Association in the United Kingdom.