Pakistan[b] (Urdu: پاکِستان), officially the Islamic Republic of Pakistan (Urdu: اِسلامی جمہوریہ پاکِستان), is a country in South Asia and crossroads of Middle East and Central Asia. It is the fifth-most populous country with a population exceeding 209,970,000 people. In area, it is the 33rd-largest country, spanning 881,913 square kilometres (340,509 square miles). Pakistan has a 1,046-kilometre (650-mile) coastline along the Arabian Sea and 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. It is separated narrowly from Tajikistan by Afghanistan's Wakhan Corridor in the northwest, and also shares a maritime border with Oman.