Foster Fyans (September 1790 – 23 May 1870) was a British Army soldier, penal colony administrator and public servant. He was acting commandant of the second convict settlement at Norfolk Island, the commandant of the Moreton Bay penal settlement at Brisbane, the first police magistrate at Geelong, and commissioner of crown lands for the Portland Bay pastoral district in the Port Phillip District of New South Wales. He is the great-great-grandfather of actor Sam Neill.