Pesoz is a municipality in the Autonomous Community of the Principality of Asturias, Spain. It is also the only parish within that municipality, meaning the municipal and parochial territories coincide.
The municipality is located in the western part of 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.
Pesoz is one of the least populated municipalities in Asturias.