Chengdu
14,378 km²
Hanoi
3,359 km²
People's Republic of China
Vietnam
Area Comparison
Chengdu is 4.3x larger than Hanoi
Population Comparison
Chengdu has 2.6x more people than Hanoi
In terms of area, Chengdu is 4.3x the size of Hanoi. Chengdu spans 14,378 km² (5,551 mi²) while Hanoi covers 3,359 km² (1,297 mi²) — a difference of 11,019 km². You could fit Hanoi inside Chengdu approximately 4 times.
To put Chengdu's size in perspective, its area of 14,378 km² is about 2.3x the size of Shanghai. Meanwhile, Hanoi at 3,359 km² is about 1.2x smaller than Rhode Island.
Picture Chengdu another way: its area is large enough to fit about 2,000,000 American football fields, 140 times the area of Paris, or 120 times the area of San Francisco. For Hanoi, that's about 470,000 American football fields, 57 times the area of Manhattan, or 32 times the area of Paris.
Chengdu is the capital city of the Chinese province of Sichuan. With a population of 20,937,757 at the 2020 census, it is the fourth most populous city in China, and it is the only city with a population of over 20 million apart from provincial-level municipalities. It is traditionally the hub of Western China.
Known as "Land of Abundance", Chengdu covers 14,378 km² with a population of 20.9 million. The city was founded around 310 BC. Chengdu is known for Giant Panda Breeding Base, Jinli Ancient Street, Wuhou Shrine, among other attractions.
Chengdu has a population of over 20.9 million, making it the fourth most populous city in China.
Hanoi is the capital and second-most populous municipality of Vietnam. It encompasses an area of 3,358.6 km2 (1,296.8 mi2), and as of 2025 has a population of 8,807,523. Hanoi had the second-highest gross regional domestic product of all Vietnamese provinces and municipalities at US$48 billion in 2023, behind Ho Chi Minh City. It hosts 78 foreign embassies, the headquarters of the Vietnam People's Army (VPA), its Vietnam National University system, and other governmental organizations.
Nicknamed "City Between Rivers", Hanoi has an area of 3,359 km² and is home to 8.1 million people. Its history stretches back to 1010. Visitors come for Hoan Kiem Lake, Old Quarter, Temple of Literature, and much more. Getting around is easy with the Hanoi Metro.
Hanoi encompasses 3,358.6 square kilometers and had a population of nearly 8.8 million as of 2025.
Chengdu has a population density of 1,456 people per km² — a relatively spread-out city. Hanoi, with 2,397 people per km², is a moderately dense city. Hanoi is noticeably denser, packing 1.6 times more people per square kilometer.
Size Ratio
Hanoi fits inside Chengdu ~4 times
Density Gap
Hanoi is 1.6x more densely populated
History
Chengdu is ~1,320 years older
Chengdu covers 14,378 km². Cities with a similar urban footprint include Brisbane (15,826 km²), Beijing (16,411 km²), Sydney (12,368 km²), Hangzhou (16,854 km²), or Xi'an (10,097 km²).
Hanoi covers 3,359 km². Cities with a similar urban footprint include Karachi (3,527 km²), Cairo (3,085 km²), Dubai (4,114 km²), Lima (2,672 km²), or Moscow (2,511 km²).
The straight-line distance from Chengdu to Hanoi is 1,086 km (675 miles), with an estimated flight time of ~1h 47m.
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