Hanoi
3,359 km²
Mumbai
603 km²
Vietnam
India
Area Comparison
Hanoi is 5.6x larger than Mumbai
Population Comparison
Hanoi has 1.5x fewer people than Mumbai
Yes — Hanoi is 5.6x larger than Mumbai by area. Hanoi spans 3,359 km² (1,297 mi²) while Mumbai covers 603 km² (233 mi²) — a difference of 2,756 km². You could fit Mumbai inside Hanoi approximately 5 times.
To put Hanoi's size in perspective, its area of 3,359 km² is about 1.2x smaller than Rhode Island. Meanwhile, Mumbai at 603 km² is roughly the same size as Seoul.
Picture Hanoi another way: its area is large enough to fit about 470,000 American football fields, 57 times the area of Manhattan, or 32 times the area of Paris. Mumbai works out to about 84,000 American football fields, 180 times the area of Central Park, or 10 times the area of Manhattan.
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.
Mumbai, also known as Bombay, is the capital city of the Indian state of Maharashtra. Mumbai is the financial capital and the most populous city proper of India, with an estimated population of 12.5 million (1.25 crore). Mumbai is the centre of the Mumbai Metropolitan Region, which is among the most populous metropolitan areas in the world with a population of over 23 million. Mumbai lies on the Konkan coast on the west coast of India and has a deep natural harbour.
Nicknamed "Bombay", Mumbai has an area of 603 km² and is home to 12.4 million people. Its history stretches back to 1507. Visitors come for Gateway of India, Marine Drive, Bollywood, and much more. Getting around is easy with the Mumbai Suburban Railway.
Mumbai is the most populous city proper in India and serves as the country's financial capital with around 12.5 million residents.
Looking beyond city limits, the Mumbai metropolitan area covers 6,355 km², which is 1.9x larger than greater Hanoi at 3,359 km². The Mumbai metro area is also more populous, with 20.7 million people compared to 8.1 million.
Hanoi has a population density of 2,397 people per km² — a moderately dense city. Mumbai, with 20,630 people per km², is one of the most densely packed urban areas on Earth. Mumbai is dramatically more crowded, with 8.6x the population density.
Both cities are in Asia, but they represent different national approaches to urban development. Hanoi (Vietnam) and Mumbai (India) offer a fascinating regional contrast.
Hanoi has a humid subtropical climate while Mumbai experiences tropical wet and dry conditions.
Size Ratio
Mumbai fits inside Hanoi ~5 times
Density Gap
Mumbai is 8.6x more densely populated
History
Hanoi is ~497 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).
Mumbai covers 603 km². Cities with a similar urban footprint include Madrid (604 km²), Seoul (605 km²), Chicago (606 km²), Toronto (630 km²), or Hyderabad (650 km²).
The straight-line distance from Hanoi to Mumbai is 3,443 km (2,140 miles), with an estimated flight time of ~4h 33m.
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