Pesoz (Eonavian: Pezós) is a municipality and the only parish in that municipality in the Autonomous Community of the Principality of Asturias, Spain. It is one of the least populated municipalities in Asturias. It is bordered on the north by Illano, on the south by Grandas de Salime, on the east by Allande and on the west by San Martín de Oscos. The municipality consists of only one parish, Pesoz.