Marín is a town and municipality in Galicia, Spain in the province of Pontevedra. It is located on the southern shore of the estuary of Pont…Marín is a town and municipality in Galicia, Spain in the province of Pontevedra. It is located on the southern shore of the estuary of Pontevedra, in the comarca of O Morrazo. This town is where the Spanish Navy was settled. It was established as the Escuela Naval Militar de Oficiales.