Myanmar, officially the Republic of the Union of Myanmar, also known as Burma (the official name until 1989), is a country in Southeast Asia. It is the largest country by area in Mainland Southeast Asia, and has a population of about 54 million as of 2017. Myanmar is bordered by Bangladesh and India to its northwest, China to its northeast, Laos and Thailand to its east and southeast, and the Andaman Sea and the Bay of Bengal to its south and southwest. The country's capital city is Naypyidaw, and its largest city is Yangon (Rangoon).