Al Hajar, Saudi Arabia

Al Hajar (مركز الحجر) is a municipality and village in Al-'Ula, Medina Region, Saudi Arabia. It lies in the northeastern part of the governorate, 55 km from Al-'Ula on the road to Asfelti. The municipality covers an area of , and had a population of 1,707 as of 2013.
The UNESCO site of the ruins of Mada'in Saleh is located within the Al Hajar municipality.