Islamabad is the capital of Pakistan and the ninth largest city in the country. Located within the Islamabad Capital Territory (ICT), the population of the city has grown from 100,000 in 1951 to 1.15million as of 2011. The greater Islamabad-Rawalpindi Metropolitan Area is the third largest conurbation in Pakistan with a population of over 4.5million inhabitants. Islamabad is located in the Pothohar Plateau in the northeastern part of the country, within the Islamabad Capital Territory. The region has historically been a part of the crossroads of Punjab and Khyber Pakhtunkhwa with Margalla pass acting as the gateway between the two regions. The city was built during the 1960s to replace Karachi as Pakistan's capital. Islamabad is a well-organised international city divided into several different sectors and zones. It is regarded as the most developed city in Pakistan and is ranked as a Gamma- world city.
Contributions by Fast track, Pakboy, and Siddiqui.