Diriyah (), formerly romanized as Dereyeh and Dariyya, is a town in Saudi Arabia located on the north-western outskirts of the Saudi capital, Riyadh. Diriyah was the original home of the Saudi royal family, and served as the capital of the Emirate of Diriyah under the first Saudi dynasty from 1744 to 1818. Today, the town is the seat of the Diriyah Governorate, which also includes the villages of Uyayna, Jubayla, and Al-Ammariyyah, among others, and is part of Ar Riyad Province.