Yernes y Tameza is a municipality in the Autonomous Community of the Principality of Asturias, Spain. It is situated in the east-central zone of the principality, between mountains high along the Cubia River. It is bordered on the west, north, and northeast by Grado, on the southeast by Proaza, and on the south by Teverga. The municipality has an abrupt topography, most notable in the peak Caldoveiru (1,357 m) and the Tameza River, which crosses the municipality from south to north.