Perth
6,417 km²
Seattle
369 km²
Australia
United States
Area Comparison
Perth is 17.4x larger than Seattle
Population Comparison
Perth has 2.9x more people than Seattle
Yes — Perth is 17.4x larger than Seattle by area. Perth spans 6,417 km² (2,478 mi²) while Seattle covers 369 km² (142 mi²) — a difference of 6,048 km². You could fit Seattle inside Perth approximately 17 times.
To put Perth's size in perspective, its area of 6,417 km² is roughly the same size as Shanghai. Meanwhile, Seattle at 369 km² is about 1.6x smaller than Seoul.
In more relatable units, Perth's 6,417 km² is about 899,000 American football fields, 110 times the area of Manhattan, or 61 times the area of Paris. Seattle works out to about 52,000 American football fields, 180 times the area of Monaco, or 110 times the area of Central Park.
Perth is the capital city of Western Australia. It is the fourth-most-populous city in Australia, with a population of over 2.3 million within Greater Perth as of 2023. The world's most isolated major city by certain criteria, Perth is part of the South West Land Division of Western Australia, with most of Perth's metropolitan area on the Swan Coastal Plain between the Indian Ocean and the Darling Scarp.
Known as "City of Light", Perth covers 6,417 km² with a population of 2.1 million. The city was established in 1829. Perth is known for Swan River, Kings Park, Cottesloe Beach, among other attractions.
Perth is considered the world's most isolated major city by certain criteria, sitting on Australia's west coast.
Seattle is the most populous city in the U.S. state of Washington and the Pacific Northwest region of North America. It is the 18th-most populous city in the United States with a population of 780,995 in 2024, while the Seattle metropolitan area at over 4.15 million residents is the 15th-most populous metropolitan area in the nation. The city is the county seat of King County, the most populous county in Washington.
Often called "The Emerald City", Seattle has an area of 369 km² and is home to 0.7 million people. It was established in 1851. Visitors come for Space Needle, Pike Place Market, Starbucks headquarters, and much more.
Seattle is Washington's most populous city with 780,995 residents in 2024, anchoring the Pacific Northwest.
Perth has a population density of 333 people per km² — a low-density, sprawling urban area. Seattle, with 2,005 people per km², is a moderately dense city. Seattle is dramatically more crowded, with 6.0x the population density.
Size Ratio
Seattle fits inside Perth ~17 times
Density Gap
Seattle is 6.0x more densely populated
Perth covers 6,417 km². Cities with a similar urban footprint include Shanghai (6,341 km²), Guangzhou (7,434 km²), Istanbul (5,461 km²), Wuhan (8,569 km²), or Melbourne (9,993 km²).
Seattle covers 369 km². Cities with a similar urban footprint include Philadelphia (370 km²), Dhaka (368 km²), Portland (376 km²), Atlanta (348 km²), or Denver (401 km²).
The straight-line distance from Perth to Seattle is 14,880 km (9,246 miles), with an estimated flight time of ~18h.
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