Nairobi
696 km²
Vienna
415 km²
Kenya
Austria
Area Comparison
Nairobi is 1.7x larger than Vienna
Population Comparison
Nairobi has 2.4x more people than Vienna
In terms of area, Nairobi is 1.7x the size of Vienna. Nairobi spans 696 km² (269 mi²) while Vienna covers 415 km² (160 mi²) — a difference of 281 km².
To put Nairobi's size in perspective, its area of 696 km² is about 1.1x smaller than New York City. Meanwhile, Vienna at 415 km² is about 1.5x smaller than Seoul.
Nairobi's footprint is roughly about 97,000 American football fields, 12 times the area of Manhattan, or 7 times the area of Paris — pick whichever unit feels intuitive. Vienna, by comparison, equals about 58,000 American football fields, 120 times the area of Central Park, or 7 times the area of Manhattan.
Nairobi is the capital and largest city of Kenya, located in the south-central part of the country. As of 2024, it has a population of 4.8 million and a metropolitan population of 5.7 million, making it the 11th most populous city in Africa. Nicknamed the "Green City under the Sun", Nairobi is uniquely notable for being the only capital city in the world that hosts a national park within its boundaries. Its name originates from the Maasai phrase Enkare Nyirobi, meaning "place of cool waters".
Known as "Green City under the Sun", Nairobi covers 696 km² with a population of 4.7 million. The city was established in 1899. Nairobi is known for Nairobi National Park, Giraffe Centre, Karen Blixen Museum, among other attractions. The city's main transit system is the Nairobi Commuter Rail.
Nairobi is the only capital city in the world that hosts a national park within its boundaries.
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.
Often called "City of Music", Vienna has an area of 415 km² and is home to 2.0 million people. The city dates 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 5.5x larger than greater Nairobi at 696 km². The Nairobi metro area is also more populous, with 4.7 million people compared to 2.8 million.
Nairobi has a population density of 6,796 people per km² — a densely populated city. Vienna, with 4,771 people per km², is a moderately dense city. Both cities have comparable density, though Nairobi is slightly more compact.
This comparison spans continents — Nairobi in Africa versus Vienna in Europe. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Nairobi has a subtropical highland climate while Vienna experiences oceanic conditions. Winters differ dramatically: Nairobi stays around 17°C while Vienna drops to 1°C. When it's noon in Nairobi, it's 10:00 AM in Vienna — a 2-hour time difference.
Density Gap
Nairobi is 1.4x more densely populated
History
Vienna is ~2,399 years older
Nairobi covers 696 km². Cities with a similar urban footprint include Tehran (730 km²), Jakarta (662 km²), Singapore (733 km²), Bangalore (741 km²), or Hyderabad (650 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 Nairobi to Vienna is 5,848 km (3,634 miles), with an estimated flight time of ~7h 23m.
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