Marlene Rosemarie Mallett (born 1959) is a British Anglican bishop and sociologist. Since June 2022, she has served as the Bishop of Croydon, an area bishop in the Diocese of Southwark. Before ordination in the Church of England, she was a research sociologist and academic, specialising in international development and ethno-cultural mental health. She was priest-in-charge and then Vicar of from 2007 to 2020; and Archdeacon of Croydon from 2020 to 2022.