Boston
232 km²
Buenos Aires
203 km²
USA
Argentina
Area Comparison
Boston is 1.1x larger than Buenos Aires
Population Comparison
Boston has 4.5x fewer people than Buenos Aires
In terms of area, Boston is 1.1x the size of Buenos Aires. Boston spans 232 km² (90 mi²) while Buenos Aires covers 203 km² (78 mi²) — a difference of 29 km².
To put Boston's size in perspective, its area of 232 km² is roughly the same size as Amsterdam. Meanwhile, Buenos Aires at 203 km² is roughly the same size as Amsterdam.
Picture Boston another way: its area is large enough to fit about 32,000 American football fields, 110 times the area of Monaco, or 68 times the area of Central Park. For Buenos Aires, that's about 28,000 American football fields, 100 times the area of Monaco, or 60 times the area of Central Park.
Boston is the capital and most populous city of the U.S. state of Massachusetts. It serves as a cultural and financial center of New England, a region of the Northeastern United States. Boston has an area of 48.4 sq mi (125 km2) and a population of 675,647 as of the 2020 census, making it the third-most populous city in the Northeastern United States after New York City and Philadelphia.
Known as "Beantown", Boston covers 232 km² with a population of 0.7 million. The city was established in 1630. Boston is known for Fenway Park, Freedom Trail, Harvard University, among other attractions. The city's main transit system is the MBTA (The T).
Boston covers just 125 km2 yet serves as the cultural and financial heart of all New England
Buenos Aires, officially the Autonomous City of Buenos Aires, is the capital and largest city of Argentina. It is located on the southwest of the Río de la Plata. Buenos Aires is classified as an Alpha− global city, according to the GaWC 2024 ranking. The city proper has a population of 3.1 million and its urban area has a population of 16.7 million, making it the 21st most populous metropolitan area in the world.
Often called "Paris of South America", Buenos Aires has an area of 203 km² and is home to 3.1 million people. It was established in 1536. Visitors come for La Boca's Caminito, Recoleta Cemetery, Teatro Colón, and much more. Getting around is easy with the Buenos Aires Subte.
Buenos Aires is classified as an Alpha− global city according to the GaWC 2024 ranking.
Looking beyond city limits, the Boston metropolitan area covers 11,700 km², which is 2.5x 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 4.9 million.
Boston has a population density of 2,931 people per km² — a moderately dense city. Buenos Aires, with 15,074 people per km², is an extremely dense urban environment. Buenos Aires is dramatically more crowded, with 5.1x the population density.
This comparison spans continents — Boston in North America versus Buenos Aires in South America. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Boston has a humid continental climate while Buenos Aires experiences humid subtropical conditions. When it's noon in Buenos Aires, it's 10:00 AM in Boston — a 2-hour time difference.
Density Gap
Buenos Aires is 5.1x more densely populated
Boston covers 232 km². Cities with a similar urban footprint include Osaka (225 km²), Kuala Lumpur (243 km²), Amsterdam (219 km²), Helsinki (214 km²), or Edinburgh (259 km²).
Buenos Aires covers 203 km². Cities with a similar urban footprint include Helsinki (214 km²), Amsterdam (219 km²), Stockholm (188 km²), Osaka (225 km²), or Boston (232 km²).
The straight-line distance from Boston to Buenos Aires is 8,655 km (5,378 miles), with an estimated flight time of ~10h 41m.
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