Afghanistan i/æfˈɡænɨstæn/ (Persian/Pashto: افغانستان, Afġānistān), officially the Islamic Republic of Afghanistan, is a landlocked country located in the centre of Asia, forming part of Central Asia, South Asia, and Greater Middle East, it is also considered to be part of a broader West Asia. With a population of about 29 million, it has an area of 647,500 km2 (250,001 sq mi), making it the 42nd most populous and 41st largest nation in the world. It is bordered by Pakistan in the south and the east, Iran in the west, Turkmenistan, Uzbekistan and Tajikistan in the north, and China in the far northeast.