Osaka
225 km²
San Antonio
1,209 km²
Japan
United States
Area Comparison
Osaka is 5.4x smaller than San Antonio
Population Comparison
Osaka has 1.9x more people than San Antonio
Yes — San Antonio is 5.4x larger than Osaka by area. San Antonio spans 1,209 km² (467 mi²) while Osaka covers 225 km² (87 mi²) — a difference of 984 km². You could fit Osaka inside San Antonio approximately 5 times.
To put Osaka's size in perspective, its area of 225 km² is roughly the same size as Amsterdam. Meanwhile, San Antonio at 1,209 km² is about 1.3x smaller than London.
In more relatable units, Osaka's 225 km² is about 32,000 American football fields, 110 times the area of Monaco, or 66 times the area of Central Park. San Antonio works out to about 169,000 American football fields, 20 times the area of Manhattan, or 11 times the area of Paris.
Osaka is a designated city in the Kansai region of Honshu in Japan. It is the capital of and most populous city in Osaka Prefecture, and the third-most populous city in Japan, following the special wards of Tokyo and Yokohama. With an estimated population of 2,816,247 as of October 1, 2025 and a population density of about 12,505 people per square kilometer, it is the largest component of the Keihanshin Metropolitan Area, the second-largest metropolitan area in Japan and the 10th-largest urban…
Known as "Nation's Kitchen", Osaka covers 225 km² with a population of 2.8 million. The city was established in 645. Osaka is known for Osaka Castle, Dotonbori district, Universal Studios Japan, among other attractions. The city's main transit system is the Osaka Metro.
Osaka is the third-most populous city in Japan, following the special wards of Tokyo and Yokohama.
San Antonio is a city in the U.S. state of Texas. It is the seventh-most populous city in the United States, the second-most populous city in Texas, and the second-most populous city in the Southern U.S., with a population of 1.43 million at the 2020 census. The Greater San Antonio metropolitan area, with an estimated 2.76 million residents, ranks as the third-largest metropolitan area in Texas and the 24th-largest in the nation. It is the county seat of Bexar County.
Also known as "Alamo City", San Antonio has an area of 1,209 km² and is home to 1.4 million people. The city dates back to 1718. Visitors come for The Alamo, San Antonio River Walk, Tower of the Americas, and much more.
San Antonio is the seventh-most populous city in the United States and second-most populous in Texas, with 1.43 million residents.
Osaka has a population density of 12,222 people per km² — an extremely dense urban environment. San Antonio, with 1,183 people per km², is a relatively spread-out city. Osaka is dramatically more crowded, with 10.3x the population density.
Size Ratio
Osaka fits inside San Antonio ~5 times
Density Gap
Osaka is 10.3x more densely populated
History
Osaka is ~1,073 years older
Osaka covers 225 km². Cities with a similar urban footprint include Amsterdam (219 km²), Boston (232 km²), Helsinki (214 km²), Kuala Lumpur (243 km²), or Buenos Aires (203 km²).
San Antonio covers 1,209 km². Cities with a similar urban footprint include Rio de Janeiro (1,221 km²), Lagos (1,172 km²), Rome (1,285 km²), Los Angeles (1,302 km²), or Hong Kong (1,114 km²).
The straight-line distance from Osaka to San Antonio is 10,911 km (6,780 miles), with an estimated flight time of ~13h 20m.
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