Houston
1,725 km²
Osaka
225 km²
United States
Japan
Area Comparison
Houston is 7.7x larger than Osaka
Population Comparison
Houston has 1.2x fewer people than Osaka
In terms of area, Houston is 7.7x the size of Osaka. Houston spans 1,725 km² (666 mi²) while Osaka covers 225 km² (87 mi²) — a difference of 1,500 km². You could fit Osaka inside Houston approximately 7 times.
To put Houston's size in perspective, its area of 1,725 km² is roughly the same size as London. Meanwhile, Osaka at 225 km² is roughly the same size as Amsterdam.
Picture Houston another way: its area is large enough to fit about 242,000 American football fields, 29 times the area of Manhattan, or 16 times the area of Paris. For Osaka, that's about 32,000 American football fields, 110 times the area of Monaco, or 66 times the area of Central Park.
Houston is the most populous city in the U.S. state of Texas and the Southern United States. It is the fourth-most populous city in the United States, with a population of 2.3 million at the 2020 census. The Greater Houston metropolitan area, at 7.8 million residents, is the fifth-most populous metropolitan area in the nation and second-most populous in Texas. Located in Southeast Texas near Galveston Bay and the Gulf of Mexico, Houston is the county seat of Harris County.
Known as "Space City", Houston covers 1,725 km² with a population of 2.3 million. The city was established in 1836. Houston is known for NASA Johnson Space Center, Space Center Houston, Houston Astros, among other attractions.
Houston is the fourth-most populous US city with 2.3 million residents at the 2020 census, leading the entire South.
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…
Nicknamed "Nation's Kitchen", Osaka has an area of 225 km² and is home to 2.8 million people. Its history stretches back to 645. Visitors come for Osaka Castle, Dotonbori district, Universal Studios Japan, and much more. Getting around is easy with the Osaka Metro.
Osaka is the third-most populous city in Japan, following the special wards of Tokyo and Yokohama.
Houston has a population density of 1,333 people per km² — a relatively spread-out city. Osaka, with 12,222 people per km², is an extremely dense urban environment. Osaka is dramatically more crowded, with 9.2x the population density.
Size Ratio
Osaka fits inside Houston ~7 times
Density Gap
Osaka is 9.2x more densely populated
History
Osaka is ~1,191 years older
Houston covers 1,725 km². Cities with a similar urban footprint include Riyadh (1,798 km²), Johannesburg (1,644 km²), Bogotá (1,578 km²), London (1,572 km²), or Bangkok (1,569 km²).
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).
The straight-line distance from Houston to Osaka is 11,083 km (6,887 miles), with an estimated flight time of ~13h 32m.
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