Osaka
225 km²
Washington D.C.
177 km²
Japan
USA
Area Comparison
Osaka is 1.3x larger than Washington D.C.
Population Comparison
Osaka has 4.0x more people than Washington D.C.
Osaka is significantly larger, covering 1.3 times the area of Washington D.C.. Osaka spans 225 km² (87 mi²) while Washington D.C. covers 177 km² (68 mi²) — a difference of 48 km².
To put Osaka's size in perspective, its area of 225 km² is roughly the same size as Amsterdam. Meanwhile, Washington D.C. at 177 km² is roughly the same size as Washington D.C..
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. For Washington D.C., that's about 25,000 American football fields, 88 times the area of Monaco, or 52 times the area of Central Park.
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.
Washington, D.C., officially the District of Columbia and commonly known as simply Washington or D.C., is the capital city and federal district of the United States. The city is on the Potomac River across from Virginia and shares land borders with Maryland to its north and east. It was named after George Washington, a Founding Father and the first president of the United States.
Often called "D.C.", Washington D.C. has an area of 177 km² and is home to 0.7 million people. The city dates back to 1790. Visitors come for White House, U.S. Capitol, Lincoln Memorial, and much more. Getting around is easy with the Washington Metro.
Washington D.C. sits on the Potomac River across from Virginia and is bordered by Maryland to its north and east
Looking beyond city limits, the Washington D.C. metropolitan area covers 14,412 km², which is 1.1x larger than greater Osaka at 13,228 km². The Osaka metro area is also more populous, with 19.3 million people compared to 6.3 million.
Osaka has a population density of 12,222 people per km² — an extremely dense urban environment. Washington D.C., with 3,898 people per km², is a moderately dense city. Osaka is dramatically more crowded, with 3.1x the population density.
This comparison spans continents — Osaka in Asia versus Washington D.C. in North America. 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 Osaka, it's midnight in Washington D.C. — a 14-hour time difference.
Density Gap
Osaka is 3.1x more densely populated
Time Difference
14 hours apart
History
Osaka is ~1,145 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).
Washington D.C. covers 177 km². Cities with a similar urban footprint include Stockholm (188 km²), Brussels (161 km²), Buenos Aires (203 km²), Minneapolis (149 km²), or Helsinki (214 km²).
The straight-line distance from Osaka to Washington D.C. is 11,173 km (6,942 miles), with an estimated flight time of ~13h 39m.
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