Margarida Tengarrinha (born 1928) is a Portuguese teacher, writer, artist and illustrator. As a member of the Portuguese Communist Party (PCP) she was active as an opponent of the authoritarian Estado Novo regime that governed Portugal between 1926 and 1974, playing a role in document forging and publication of the Party's magazine Avante!. She spent two years in Moscow with the future leader of the PCP, Álvaro Cunhal, and then worked in Bucharest, Romania on a radio station broadcasting to Portugal. After the overthrow of the regime, she became a deputy in the Assembly of the Republic. More recently she has written memoirs, taught at a Senior University, illustrated books and exhibited works of art.