Bangladesh is a sovereign state in South Asia. It forms the largest and eastern portion the ethno-linguistic region of Bengal. Located at the apex of the Bay of Bengal, the country is bordered by India and Myanmar and is separated from Nepal and Bhutan by the narrow Siliguri Corridor. With a population of 170 million, it is the world's eighth-most populous country, the fifth-most populous in Asia and the third-most populous Muslim-majority country. The official Bengali language is the seventh-most spoken language in the world, which Bangladesh shares with the neighboring Indian states of West Bengal, Tripura and Assam.