Kathmandu, officially Kathmandu Metropolitan City, is the capital and most populous city of Nepal with 845,767 inhabitants living in 105,649 households as of the 2021 Nepal census and 2.9 million people in its urban agglomeration. It is located in the Kathmandu Valley, a large valley in the high plateaus in central Nepal, at an altitude of .
The city is one of the oldest continuously inhabited places in the world, founded in the 2nd century AD. The valley was historically called the "Nepal Mandala" and has been the home of the Newar people, a cosmopolitan urban civilization in the Himalayan foothills. The city was the royal capital of the Kingdom of Nepal and hosts palaces, mansions and gardens built by the Nepali aristocracy. It has been home to the headquarters of the South Asian Association for Regional Cooperation (SAARC) since 1985 AD. Today, it is the seat of government of the Federal Democratic Republic of Nepal, established in 2008 AD, and is part of Bagmati