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Argentina
China
Area Comparison
Buenos Aires is 5.5x smaller than Hong Kong
Population Comparison
Buenos Aires has 2.4x fewer people than Hong Kong
In terms of area, Hong Kong is 5.5x the size of Buenos Aires. Hong Kong spans 1,114 km² (430 mi²) while Buenos Aires covers 203 km² (78 mi²) — a difference of 911 km². You could fit Buenos Aires inside Hong Kong approximately 5 times.
To put Buenos Aires's size in perspective, its area of 203 km² is roughly the same size as Amsterdam. Meanwhile, Hong Kong at 1,114 km² is about 1.2x the size of Berlin.
Argentina's capital and a cultural powerhouse of South America. Known as "The Paris of South America", Buenos Aires covers 203 km² with a population of 3.1 million. The city was established in 1536. Buenos Aires is known for Tango dancing, La Boca neighborhood, Recoleta Cemetery, among other attractions. The city's main transit system is the Buenos Aires Subte.
Buenos Aires has more bookstores per capita than any other city in the world
A major financial hub and special administrative region of China. Often called "Pearl of the Orient", Hong Kong has an area of 1,114 km² and is home to 7.4 million people. The city dates back to 1841. Visitors come for Victoria Harbour skyline, Dim sum cuisine, Star Ferry, and much more. Getting around is easy with the MTR Hong Kong.
Hong Kong has more skyscrapers than any other city in the world, with over 480 buildings above 150 meters
Buenos Aires has a population density of 15,074 people per km² — an extremely dense urban environment. Hong Kong, with 6,652 people per km², is a densely populated city. Buenos Aires is noticeably denser, packing 2.3 times more people per square kilometer.
This comparison spans continents — Buenos Aires in South America versus Hong Kong in Asia. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Both cities share a humid subtropical climate, though local geography creates distinct microclimates in each. When it's noon in Hong Kong, it's 1:00 AM in Buenos Aires — a 11-hour time difference.
Size Ratio
Buenos Aires fits inside Hong Kong ~5 times
Density Gap
Buenos Aires is 2.3x more densely populated
Time Difference
11 hours apart
History
Buenos Aires is ~305 years older
The straight-line distance from Buenos Aires to Hong Kong is 18,468 km (11,476 miles), with an estimated flight time of ~22h 14m. See full distance details, including timezone difference and city facts.
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