Casablanca - Wikipedia Casablanca[a] is the largest city in Morocco and the country's economic and business centre Located on the Atlantic coast of the Chaouia plain in the central-western part of Morocco, the city has a population of about 3 22 million in the urban area, and over 4 27 million in Greater Casablanca, making it the most populous city in the Maghreb region, and the ninth-largest in the Arab world The