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Argentina
Australia
Area Comparison
Buenos Aires is 60.9x smaller than Sydney
Population Comparison
Buenos Aires has 1.7x fewer people than Sydney
Yes — Sydney is 60.9x larger than Buenos Aires by area. Sydney spans 12,368 km² (4,775 mi²) while Buenos Aires covers 203 km² (78 mi²) — a difference of 12,165 km². You could fit Buenos Aires inside Sydney approximately 60 times.
To put Buenos Aires's size in perspective, its area of 203 km² is roughly the same size as Amsterdam. Meanwhile, Sydney at 12,368 km² is about 2.0x the size of Shanghai.
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
Australia's largest city, known for the Opera House. Also known as "The Harbour City", Sydney has an area of 12,368 km² and is home to 5.3 million people. Its history stretches back to 1788. Visitors come for Sydney Opera House, Harbour Bridge, Bondi Beach, and much more. Getting around is easy with the Sydney Trains.
Sydney's administrative area is so large it stretches from the coast to the Blue Mountains foothills
Looking beyond city limits, the Sydney metropolitan area covers 12,368 km², which is 2.6x larger than greater Buenos Aires at 4,758 km². The Buenos Aires metro area is also more populous, with 15.2 million people compared to 5.3 million.
Buenos Aires has a population density of 15,074 people per km² — an extremely dense urban environment. Sydney, with 429 people per km², is a low-density, sprawling urban area. Buenos Aires is dramatically more crowded, with 35.1x the population density.
This comparison spans continents — Buenos Aires in South America versus Sydney in Oceania. 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 Sydney, it's midnight in Buenos Aires — a 13-hour time difference.
Size Ratio
Buenos Aires fits inside Sydney ~60 times
Density Gap
Buenos Aires is 35.1x more densely populated
Time Difference
13 hours apart
History
Buenos Aires is ~252 years older
The straight-line distance from Buenos Aires to Sydney is 11,801 km (7,333 miles), with an estimated flight time of ~14h 23m. See full distance details, including timezone difference and city facts.
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