Diefha is a small mountain village in northwestern Chios island, 30 kilometers from the town of Chios. The average elevation of the village is 240 meters above sea level. Diefha is built on the southwestern slopes of Mount Oros with vegetation of trees and forest trees. Nearest settlement is Katavasi, about 2 kilometers to the south and lower. Brief but rocky road connects the village with the important Moundon monastery.