Hangzhou
16,854 km²
Hanoi
3,359 km²
People's Republic of China
Vietnam
Area Comparison
Hangzhou is 5.0x larger than Hanoi
Population Comparison
Hangzhou has 1.5x more people than Hanoi
Yes — Hangzhou is 5.0x larger than Hanoi by area. Hangzhou spans 16,854 km² (6,507 mi²) while Hanoi covers 3,359 km² (1,297 mi²) — a difference of 13,495 km². You could fit Hanoi inside Hangzhou approximately 5 times.
To put Hangzhou's size in perspective, its area of 16,854 km² is about 2.7x the size of Shanghai. Meanwhile, Hanoi at 3,359 km² is about 1.2x smaller than Rhode Island.
In more relatable units, Hangzhou's 16,854 km² is about 2,400,000 American football fields, 160 times the area of Paris, or 140 times the area of San Francisco. Hanoi works out to about 470,000 American football fields, 57 times the area of Manhattan, or 32 times the area of Paris.
Hangzhou is the capital city and most populous city of Zhejiang province, China, situated at the intersection of the southern terminus of the Grand Canal and the head of Hangzhou Bay. Renowned as one of the Eight Ancient Capitals of China, Hangzhou is celebrated for its cultural heritage and its West Lake, a UNESCO World Heritage site.
Known as "Paradise on Earth", Hangzhou covers 16,854 km² with a population of 11.9 million. Hangzhou is known for West Lake, Grand Canal terminus, Lingyin Temple, among other attractions.
Hangzhou's West Lake is a UNESCO World Heritage site, drawing visitors to its celebrated cultural landscape.
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. The city dates 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.
Hangzhou has a population density of 708 people per km² — a relatively spread-out city. Hanoi, with 2,397 people per km², is a moderately dense city. Hanoi is dramatically more crowded, with 3.4x the population density.
Size Ratio
Hanoi fits inside Hangzhou ~5 times
Density Gap
Hanoi is 3.4x more densely populated
Hangzhou covers 16,854 km². Cities with a similar urban footprint include Beijing (16,411 km²), Brisbane (15,826 km²), Chengdu (14,378 km²), Sydney (12,368 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 Hangzhou to Hanoi is 1,762 km (1,095 miles), with an estimated flight time of ~2h 34m.
Want to explore more? Compare city sizes for any two cities worldwide, or share your location live with friends.