Monio Ermiges (1050 - 1107) was a nobleman of the County of Portucale and holder of the feudal lordship of Ribadouro, a Portuguese parish in the municipality of Baião.
He was the son of Ermigio Viegas (1020 -?), lord of Ribadouro, and Unisco Pais (1030 -?). He married Ouroana (1060 -?), with whom he had: