Ad Dakhiliyah (Arabic: الداخلية) is one of the governorates (muhafazah) of Oman with Nizwa town as the regional center. It was previously a region (mintaqah). It became a governorate on 28 October 2011.
Ad Dakhiliyah Region consists of eight wilayats: Nizwa, Samail, Bahla, Adam, Al Hamra, Manah, Izki and Bid Bid.
Coordinates: 22°N 57°E / 22°N 57°E / 22; 57