Yangon, formerly romanized as Rangoon, is the capital of the Yangon Region and the largest city of Myanmar. Yangon served as the capita…Yangon, formerly romanized as Rangoon, is the capital of the Yangon Region and the largest city of Myanmar. Yangon served as the capital of Myanmar until 2006, when the military government relocated the administrative functions to the purpose-built capital city of Naypyidaw in north central Myanmar. With over five million people, Yangon is Myanmar's most populous city and its most important commercial centre.