Ksar el-Kebir, also known as al-Qasr al-Kabir, is a city in northwestern Morocco, about 160 km north of Rabat, 32 km east of Larache and 1…Ksar el-Kebir, also known as al-Qasr al-Kabir, is a city in northwestern Morocco, about 160 km north of Rabat, 32 km east of Larache and 110 km south of Tangier. It recorded a population of 126,617 in the 2014 Moroccan census.