Kabul is the capital and largest city of Afghanistan, located in the eastern section of the country. It is also a municipality, forming part of the greater Kabul Province, and divided into 22 districts. According to estimates in 2020, the population of Kabul is 4.222 million, which includes all the major ethnic groups of Afghanistan. Afghanistan's only city with a population of over 1 million, Kabul serves as its political, cultural and economical center. Rapid urbanization has made Kabul the world's 75th largest city.
Kabul is located high up in a narrow valley between the Hindu Kush mountains, with an elevation of 1,790 metres making it one of the highest capitals in the world. The city is said to be over 3,500 years old, mentioned since at least the time of the Achaemenid Empire. Located at crossroads in Asia - roughly halfway between Istanbul in the west and Hanoi in the east - it is in a strategic location along the trade routes of South and Central Asia, and a key location of the ancient Silk Road.