Rías Altas is the northernmost of three sections of A Costa do Marisco in Galicia, Spain. It extends from the port of Ribadeo to Santa Cruz.
The Upper Rias refers to the coast of the northern part of A Coruña Province and the entire coastline of the Lugo Province.
The biggest city port of the Upper Rias is Ferrol - the most important Naval Station in North-western Spain.