See Mohammadia for the town and commune in Mascara Province, Algeria.Mohammédia (Arabic: المحمدية‎, Al-Muḥammadia, Moroccan Arabic: El Muḥemmadiya, Fḍala) is a port city on the west coast of Morocco between Casablanca and Rabat in the region of Casablanca-Settat. It hosts the most important oil refinery of Morocco, the Samir refinery, which makes it the center of the Moroccan petroleum industry. It has a population of 188,619 (2004 census).