Seattle
369 km²
Sydney
12,368 km²
United States
Australia
Area Comparison
Seattle is 33.5x smaller than Sydney
Population Comparison
Seattle has 7.2x fewer people than Sydney
Yes — Sydney is 33.5x larger than Seattle by area. Sydney spans 12,368 km² (4,775 mi²) while Seattle covers 369 km² (142 mi²) — a difference of 11,999 km². You could fit Seattle inside Sydney approximately 33 times.
To put Seattle's size in perspective, its area of 369 km² is about 1.6x smaller than Seoul. Meanwhile, Sydney at 12,368 km² is about 2.0x the size of Shanghai.
Picture Seattle another way: its area is large enough to fit about 52,000 American football fields, 180 times the area of Monaco, or 110 times the area of Central Park. Sydney, by comparison, equals about 1,700,000 American football fields, 120 times the area of Paris, or 100 times the area of San Francisco.
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.
Known as "The Emerald City", Seattle covers 369 km² with a population of 0.7 million. The city was established in 1851. Seattle is known for Space Needle, Pike Place Market, Starbucks headquarters, among other attractions.
Seattle is Washington's most populous city with 780,995 residents in 2024, anchoring the Pacific Northwest.
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. It was established in 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.
Seattle has a population density of 2,005 people per km² — a moderately dense city. Sydney, with 429 people per km², is a low-density, sprawling urban area. Seattle is dramatically more crowded, with 4.7x the population density.
Size Ratio
Seattle fits inside Sydney ~33 times
Density Gap
Seattle is 4.7x more densely populated
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).
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 Seattle to Sydney is 12,470 km (7,749 miles), with an estimated flight time of ~15h 10m.
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