Kathmandu District is a district located in Kathmandu Valley, Bagmati Province of Nepal. It is one of the 77 districts of Nepal, covers an area of 413.69 km² (159.73 sq mi), and is the most densely populated district of Nepal with 1,081,845 inhabitants in 2001, 1,744,240 in 2011 and 2,017,532 in 2021. The administrative headquarters of Kathmandu district is located in Kathmandu.