The population of Bhutan had been estimated based on the reported figure of about 1 million in the 1970s when the country had joined the United Nations and precise statistics were lacking. Thus, using the annual increase rate of 2–3%, the most population estimates were around 2 million in the year 2000. A national census was carried out in 2005 and it turned out that the population was 672,425. Consequently, United Nations Population Division reduced its estimation of the country's population in the 2006 revision for the whole period from 1950 to 2050.

Bhutan (/buːˈtɑːn/; འབྲུག་ཡུལ་ druk yul), officially the Kingdom of Bhutan (འབྲུག་རྒྱལ་ཁབ་ druk gyal khap), is a landlocked country and the smallest state in Asia to be located entirely within the Himalaya mountain range. Located in the Eastern Himalayas, it is bordered by China in the north and India in the south. Bhutan lacks a border with nearby Nepal due to the Indian state of Sikkim and with Bangladesh due to the Indian states of West Bengal and Assam. Bhutan is geopolitically in South Asia and is the region's second least populous nation after the Maldives. Thimphu is its capital and largest city, while Phuntsholing is its financial center.