Chicago
606 km²
Osaka
225 km²
USA
Japan
Area Comparison
Chicago is 2.7x larger than Osaka
Population Comparison
Chicago has 1.0x fewer people than Osaka
Yes — Chicago is 2.7x larger than Osaka by area. Chicago spans 606 km² (234 mi²) while Osaka covers 225 km² (87 mi²) — a difference of 381 km². You could fit Osaka inside Chicago approximately 2 times.
To put Chicago's size in perspective, its area of 606 km² is roughly the same size as Seoul. Meanwhile, Osaka at 225 km² is roughly the same size as Amsterdam.
Picture Chicago another way: its area is large enough to fit about 85,000 American football fields, 180 times the area of Central Park, or 10 times the area of Manhattan. Osaka, by comparison, equals about 32,000 American football fields, 110 times the area of Monaco, or 66 times the area of Central Park.
Chicago is the most populous city in the U.S. state of Illinois and in the Midwestern United States. Located on the western shore of Lake Michigan, it is the third-most populous city in the United States, with a population of 2.74 million at the 2020 census. The Chicago metropolitan area has 9.41 million residents and is the third-largest metropolitan area in the country. Chicago is the seat of Cook County, the second-most populous county in the U.S.
Known as "The Windy City", Chicago covers 606 km² with a population of 2.7 million. The city was established in 1833. Chicago is known for Willis Tower, Millennium Park Bean, Navy Pier, among other attractions. The city's main transit system is the CTA (L train).
Chicago is the third-most populous city in the United States with 2.74 million residents at the 2020 census.
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. It was established in 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.
Looking beyond city limits, the Chicago metropolitan area covers 28,160 km², which is 2.1x larger than greater Osaka at 13,228 km². The Osaka metro area is also more populous, with 19.3 million people compared to 9.5 million.
Chicago has a population density of 4,455 people per km² — a moderately dense city. Osaka, with 12,222 people per km², is an extremely dense urban environment. Osaka is noticeably denser, packing 2.7 times more people per square kilometer.
This comparison spans continents — Chicago in North America versus Osaka in Asia. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Chicago has a humid continental climate while Osaka experiences humid subtropical conditions. When it's noon in Osaka, it's midnight in Chicago — a 15-hour time difference.
Size Ratio
Osaka fits inside Chicago ~2 times
Density Gap
Osaka is 2.7x more densely populated
Time Difference
15 hours apart
History
Osaka is ~1,188 years older
Chicago covers 606 km². Cities with a similar urban footprint include Seoul (605 km²), Madrid (604 km²), Mumbai (603 km²), Toronto (630 km²), or Hyderabad (650 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 Chicago to Osaka is 10,433 km (6,483 miles), with an estimated flight time of ~12h 46m.
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