Osaka
225 km²
Sydney
12,368 km²
Japan
Australia
Area Comparison
Osaka is 55.0x smaller than Sydney
Population Comparison
Osaka has 1.9x fewer people than Sydney
Sydney is significantly larger, covering 55.0 times the area of Osaka. Sydney spans 12,368 km² (4,775 mi²) while Osaka covers 225 km² (87 mi²) — a difference of 12,143 km². You could fit Osaka inside Sydney approximately 54 times.
To put Osaka's size in perspective, its area of 225 km² is roughly the same size as Amsterdam. Meanwhile, Sydney at 12,368 km² is about 2.0x the size of Shanghai.
Osaka's footprint is roughly about 32,000 American football fields, 110 times the area of Monaco, or 66 times the area of Central Park — pick whichever unit feels intuitive. For Sydney, that's about 1,700,000 American football fields, 120 times the area of Paris, or 100 times the area of San Francisco.
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.
Sydney is the capital city of the state of New South Wales, and is the most populous city in Australia. Located on Australia's east coast, the metropolis surrounds Sydney Harbour and extends about 80 kilometres (50 mi) from the Pacific Ocean in the east to the Blue Mountains in the west, and about 80 kilometres (50 mi) from Ku-ring-gai Chase National Park and the Hawkesbury River in the north and north-west, to the Royal National Park and Macarthur in the south and south-west.
Often called "Sydneysiders", Sydney has an area of 12,368 km² and is home to 5.3 million people. Its history stretches back to 1788. Visitors come for Sydney Opera House, Sydney Harbour Bridge, Bondi Beach, and much more. Getting around is easy with the Sydney Trains.
Sydney stretches roughly 80 km from the Pacific Ocean in the east to the Blue Mountains in the west.
Looking beyond city limits, the Osaka metropolitan area covers 13,228 km², which is 1.1x larger than greater Sydney at 12,368 km². The Osaka metro area is also more populous, with 19.3 million people compared to 5.3 million.
Osaka has a population density of 12,222 people per km² — an extremely dense urban environment. Sydney, with 429 people per km², is a low-density, sprawling urban area. Osaka is dramatically more crowded, with 28.5x the population density.
This comparison spans continents — Osaka in Asia versus Sydney in Oceania. 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.
Size Ratio
Osaka fits inside Sydney ~54 times
Density Gap
Osaka is 28.5x more densely populated
History
Osaka is ~1,143 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).
Sydney covers 12,368 km². Cities with a similar urban footprint include Chengdu (14,378 km²), Xi'an (10,097 km²), Melbourne (9,993 km²), Brisbane (15,826 km²), or Beijing (16,411 km²).
The straight-line distance from Osaka to Sydney is 7,797 km (4,845 miles), with an estimated flight time of ~9h 40m.
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