Pakistan has a population of 199,085,847 (199.1 million) as of 2015.
which is equivalent to 2.57% of the world population. Noted as the sixth most populated country in the world, its growth rate is reported at ~2.03%, which is the highest of the SAARC nations and gives an annual increase of 3.6 million.
The population is projected to reach 210.13 million by 2020 and to double by 2045. Pakistan is classified as a "young nation" with a median age of about 22, and 104 million people under the age of 30 in 2010. Pakistan's fertility rate stands at 3.07. Around 35% of the people are under 15. Vast majority residing in southern skirts lives along the Indus River, with Karachi being its most populous commercial city.
In the eastern, western, and northern skirts, most of the population lives in an arc formed by the cities of Lahore, Faisalabad, Rawalpindi, Sargodha, Islamabad,
Gujranwala, Sialkot etc. During 1990–2008, the city dwellers made up 36% of Pakistan's population, making it the most urbanized nation in South Asia.
Furthermore, 50% of Pakistanis live in towns of 5,000 people or more. Pakistan has a 1,046-kilometre (650 mi) coastline along the Arabian Sea and the Gulf of Oman in the south and is bordered by India to the east, Afghanistan to the west, Iran to the southwest and China in the far northeast respectively. It is separated from Tajikistan by Afghanistan's narrow Wakhan Corridor in the north, and also shares a maritime border with Oman.