Bangkok
1,569 km²
Hanoi
3,359 km²
Thailand
Vietnam
Area Comparison
Bangkok is 2.1x smaller than Hanoi
Population Comparison
Bangkok has 1.3x more people than Hanoi
In terms of area, Hanoi is 2.1x the size of Bangkok. Hanoi spans 3,359 km² (1,297 mi²) while Bangkok covers 1,569 km² (606 mi²) — a difference of 1,790 km². You could fit Bangkok inside Hanoi approximately 2 times.
To put Bangkok's size in perspective, its area of 1,569 km² is roughly the same size as London. Meanwhile, Hanoi at 3,359 km² is about 1.2x smaller than Rhode Island.
Bangkok's footprint is roughly about 220,000 American football fields, 27 times the area of Manhattan, or 15 times the area of Paris — pick whichever unit feels intuitive. Hanoi works out to about 470,000 American football fields, 57 times the area of Manhattan, or 32 times the area of Paris.
Bangkok, officially known in Thai as Krung Thep Maha Nakhon and colloquially as Krung Thep, is the capital and most populous city of Thailand. The city occupies 1,568.7 square kilometres (605.7 sq mi) in the Chao Phraya River delta in central Thailand and has an estimated population of 11.4 million people as of 2024, 15.9% of the country's population.
Known as "City of Angels", Bangkok covers 1,569 km² with a population of 10.5 million. The city was established in 1782. Bangkok is known for Grand Palace, Wat Arun, Wat Pho, among other attractions. The city's main transit system is the BTS Skytrain & MRT.
Bangkok's official Thai name is Krung Thep Maha Nakhon, with the full ceremonial name being one of the longest place names in the world.
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.
Looking beyond city limits, the Bangkok metropolitan area covers 7,762 km², which is 2.3x larger than greater Hanoi at 3,359 km². The Bangkok metro area is also more populous, with 16.2 million people compared to 8.1 million.
Bangkok has a population density of 6,718 people per km² — a densely populated city. Hanoi, with 2,397 people per km², is a moderately dense city. Bangkok is noticeably denser, packing 2.8 times more people per square kilometer.
Both cities are in Asia, but they represent different national approaches to urban development. Bangkok (Thailand) and Hanoi (Vietnam) offer a fascinating regional contrast.
Bangkok has a tropical savanna climate while Hanoi experiences humid subtropical conditions.
Size Ratio
Bangkok fits inside Hanoi ~2 times
Density Gap
Bangkok is 2.8x more densely populated
History
Hanoi is ~772 years older
Bangkok covers 1,569 km². Cities with a similar urban footprint include London (1,572 km²), Bogotá (1,578 km²), São Paulo (1,521 km²), Johannesburg (1,644 km²), or Mexico City (1,485 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 Bangkok to Hanoi is 987 km (613 miles), with an estimated flight time of ~1h 40m.
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