Maaouya Ould Sid'Ahmed Taya (, , also transliterated as Mu'awiya walad Sayyidi Ahmad Taya) (born November 28, 1941) is a Mauritanian military officer who served as the president of Mauritania from 1984 to 2005. He was ousted by a military coup in 2005. Prior to his presidency, he held the position of prime minister from 1981 to 1984.