Hanoi
3,359 km²
Tokyo
2,194 km²
Vietnam
Japan
Area Comparison
Hanoi is 1.5x larger than Tokyo
Population Comparison
Hanoi has 1.7x fewer people than Tokyo
Yes — Hanoi is 1.5x larger than Tokyo by area. Hanoi spans 3,359 km² (1,297 mi²) while Tokyo covers 2,194 km² (847 mi²) — a difference of 1,165 km².
To put Hanoi's size in perspective, its area of 3,359 km² is about 1.2x smaller than Rhode Island. Meanwhile, Tokyo at 2,194 km² is about 1.1x smaller than Moscow.
In more relatable units, Hanoi's 3,359 km² is about 470,000 American football fields, 57 times the area of Manhattan, or 32 times the area of Paris. Tokyo, by comparison, equals about 307,000 American football fields, 37 times the area of Manhattan, or 21 times the area of Paris.
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.
Known as "City Between Rivers", Hanoi covers 3,359 km² with a population of 8.1 million. The city was established in 1010. Hanoi is known for Hoan Kiem Lake, Old Quarter, Temple of Literature, among other attractions. The city's main transit system is the Hanoi Metro.
Hanoi encompasses 3,358.6 square kilometers and had a population of nearly 8.8 million as of 2025.
Tokyo, officially the Tokyo Metropolis, is the capital and most populous city of Japan. With a population of over 14 million in the city proper in 2023, it is one of the most populous urban areas in the world. The Greater Tokyo Area, which includes Tokyo and parts of six neighboring prefectures, is the most populous metropolitan area in the world, with 41 million residents as of 2024.
Nicknamed "Eastern Capital", Tokyo has an area of 2,194 km² and is home to 14.0 million people. It was established in 1457. Visitors come for Shibuya Crossing, Tokyo Tower, Imperial Palace, and much more. Getting around is easy with the Tokyo Metro & JR East.
Greater Tokyo holds 41 million residents as of 2024, making it the most populous metropolitan area on Earth.
Looking beyond city limits, the Tokyo metropolitan area covers 13,572 km², which is 4.0x larger than greater Hanoi at 3,359 km². The Tokyo metro area is also more populous, with 37.4 million people compared to 8.1 million.
Hanoi has a population density of 2,397 people per km² — a moderately dense city. Tokyo, with 6,363 people per km², is a densely populated city. Tokyo is noticeably denser, packing 2.7 times more people per square kilometer.
Both cities are in Asia, but they represent different national approaches to urban development. Hanoi (Vietnam) and Tokyo (Japan) offer a fascinating regional contrast.
Both cities share a humid subtropical climate, though local geography creates distinct microclimates in each. When it's noon in Tokyo, it's 10:00 AM in Hanoi — a 2-hour time difference.
Density Gap
Tokyo is 2.7x more densely populated
History
Hanoi is ~447 years older
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).
Tokyo covers 2,194 km². Cities with a similar urban footprint include Ho Chi Minh City (2,061 km²), Shenzhen (1,997 km²), Cape Town (2,455 km²), Moscow (2,511 km²), or Lima (2,672 km²).
The straight-line distance from Hanoi to Tokyo is 3,663 km (2,276 miles), with an estimated flight time of ~4h 49m.
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