Orlando Marques de Almeida Mendes (Island of Mozambique, 4 August 1916 – Maputo, 11 January 1990) was a Mozambican biologist and writer.
He lived the Portuguese decolonisation of Mozambique. In 1944, he moved with his wife and daughter to Coimbra, where he studied biology at the University of Coimbra.
He worked as a biologist in Lourenço Marques and wrote for several publications such as: Tempo, Itinerário, Vértice and África. In spite of being European, he strongly criticized colonial treatment towards black people and Salazar's administration. During the Portuguese Colonial War, he was with FRELIMO nationalist party.