Ho Chi Minh City (HCMC, Vietnamese: Thành phố Hồ Chí Minh), formerly (and still commonly) known as Saigon (Vietnamese: Sài Gòn), is the most populous city in Vietnam, with a population of around 9.3 million in 2023. The city's geography is defined by rivers and canals, the largest of which is the eponymously-named Saigon River. As a municipality, Ho Chi Minh City consists of 16 urban districts, 6 rural districts, and 1 municipal city (Thủ Đức). As the largest financial centre in Vietnam, Ho Chi Minh City has the highest gross regional domestic product out of all Vietnam provinces and municipalities, contributing around a quarter of the country's total GDP. Ho Chi Minh City metropolitan is ASEAN 6th largest economy, also the biggest outside ASEAN country capital.