Karachi Grammar School (Urdu: کراچی گرامر اسکول) is an independent, English-medium school located in 3 different campuses across Karachi. The main and oldest campus is located in Saddar, Karachi, Sindh, Pakistan. It is a highly selective, coeducational day school (formerly day/boarding school) serving approximately 2,400 students aged between three and nineteen years. Since the 1980s, Karachi Grammar School has expanded from a school with a population of a few hundred students to a large institution that now occupies three sites and teaches more than two thousand students.