Hanoi
3,359 km²
Vienna
415 km²
Vietnam
Austria
Area Comparison
Hanoi is 8.1x larger than Vienna
Population Comparison
Hanoi has 4.1x more people than Vienna
Yes — Hanoi is 8.1x larger than Vienna by area. Hanoi spans 3,359 km² (1,297 mi²) while Vienna covers 415 km² (160 mi²) — a difference of 2,944 km². You could fit Vienna inside Hanoi approximately 8 times.
To put Hanoi's size in perspective, its area of 3,359 km² is about 1.2x smaller than Rhode Island. Meanwhile, Vienna at 415 km² is about 1.5x smaller than 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. Vienna works out to about 58,000 American football fields, 120 times the area of Central Park, or 7 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.
Vienna is the capital, most populous city, and one of the nine states of Austria. It is Austria's primate city, with just over two million inhabitants. Its larger metropolitan area has a population of nearly 2.9 million, representing nearly one-third of the country's population. Vienna is the cultural, economic, and political centre of the country, the fifth-largest city by population in the European Union, and the most populous of the cities on the river Danube.
Nicknamed "City of Music", Vienna has an area of 415 km² and is home to 2.0 million people. Its history stretches back to 500 BC. Visitors come for Schönbrunn Palace, St. Stephen's Cathedral, Hofburg Palace, and much more. Getting around is easy with the Wiener Linien (U-Bahn).
Vienna's metropolitan area holds nearly 2.9 million people, representing roughly one-third of Austria's entire population
Looking beyond city limits, the Vienna metropolitan area covers 3,840 km², which is 1.1x larger than greater Hanoi at 3,359 km². The Hanoi metro area is also more populous, with 8.1 million people compared to 2.8 million.
Hanoi has a population density of 2,397 people per km² — a moderately dense city. Vienna, with 4,771 people per km², is a moderately dense city. Vienna is noticeably denser, packing 2.0 times more people per square kilometer.
This comparison spans continents — Hanoi in Asia versus Vienna in Europe. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Hanoi has a humid subtropical climate while Vienna experiences oceanic conditions. Winters differ dramatically: Hanoi stays around 17°C while Vienna drops to 1°C. When it's noon in Hanoi, it's 6:00 AM in Vienna — a 6-hour time difference.
Size Ratio
Vienna fits inside Hanoi ~8 times
Density Gap
Vienna is 2.0x more densely populated
Time Difference
6 hours apart
History
Vienna is ~1,510 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).
Vienna covers 415 km². Cities with a similar urban footprint include Denver (401 km²), Oslo (454 km²), Portland (376 km²), Philadelphia (370 km²), or Seattle (369 km²).
The straight-line distance from Hanoi to Vienna is 8,243 km (5,122 miles), with an estimated flight time of ~10h 12m.
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