 It borders the municipalities of Burela and Barreiros, and to interior with the municipalities of Lourenzá, Mondoñedo, O Valadouro, Alfoz and Cervo.Foz is a coastal town on the shores of the Cantabrian Sea at the mouth of the river Masma, where it forms the Foz estuary, with an approximate area of 100 km².Although Foz was previously a fishing village, now the major part of its economic resources is from tourism.