Oslo
454 km²
Seattle
369 km²
Norway
United States
Area Comparison
Oslo is 1.2x larger than Seattle
Population Comparison
Oslo has 1.0x fewer people than Seattle
Oslo is significantly larger, covering 1.2 times the area of Seattle. Oslo spans 454 km² (175 mi²) while Seattle covers 369 km² (142 mi²) — a difference of 85 km².
To put Oslo's size in perspective, its area of 454 km² is about 1.3x smaller than Seoul. Meanwhile, Seattle at 369 km² is about 1.6x smaller than Seoul.
In more relatable units, Oslo's 454 km² is about 64,000 American football fields, 130 times the area of Central Park, or 8 times the area of Manhattan. Seattle, by comparison, equals about 52,000 American football fields, 180 times the area of Monaco, or 110 times the area of Central Park.
Oslo is the capital and most populous city of Norway. It constitutes both a county and a municipality. The municipality of Oslo had a population of 724,290 in 2025, while the city's greater urban area had a population of 1,110,887 in 2025, and the metropolitan area had an estimated population of 1,546,706 in 2021.
Known as "Tigerstaden", Oslo covers 454 km² with a population of 0.7 million. The city was established in 1048. Oslo is known for Vigeland Park, Oslo Opera House, Akershus Fortress, among other attractions.
Oslo is both a county and a municipality, with the city itself home to about 724,000 residents in 2025.
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.
Also known as "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.
Oslo has a population density of 1,586 people per km² — a relatively spread-out city. Seattle, with 2,005 people per km², is a moderately dense city. Both cities have comparable density, though Seattle is slightly more compact.
History
Oslo is ~803 years older
Oslo covers 454 km². Cities with a similar urban footprint include Prague (496 km²), Vienna (415 km²), Montreal (498 km²), Denver (401 km²), or Warsaw (517 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 Oslo to Seattle is 7,329 km (4,554 miles), with an estimated flight time of ~9h 7m.
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