Philadelphia
370 km²
Seattle
369 km²
United States
United States
Area Comparison
Philadelphia is 1.0x larger than Seattle
Population Comparison
Philadelphia has 2.2x more people than Seattle
Yes — Philadelphia is 1.0x larger than Seattle by area. Philadelphia spans 370 km² (143 mi²) while Seattle covers 369 km² (142 mi²) — a difference of 1 km².
To put Philadelphia's size in perspective, its area of 370 km² is about 1.6x smaller than Seoul. Meanwhile, Seattle at 369 km² is about 1.6x smaller than Seoul.
Philadelphia's footprint is roughly about 52,000 American football fields, 180 times the area of Monaco, or 110 times the area of Central Park — pick whichever unit feels intuitive. Seattle, by comparison, equals about 52,000 American football fields, 180 times the area of Monaco, or 110 times the area of Central Park.
Philadelphia, colloquially referred to as Philly, is the most populous city in the U.S. state of Pennsylvania, and the sixth-most populous city in the United States, with a Census-estimated population of 1,574,281 in July 2025. The Philadelphia metropolitan area has 6.33 million residents and is the nation's ninth-largest metropolitan area. Philadelphia is known for its culture, cuisine, and history, maintaining contemporary influence in business and technology, sports, and music.
Known as "Philly", Philadelphia covers 370 km² with a population of 1.6 million. The city was established in 1682. Philadelphia is known for Liberty Bell, Independence Hall, Philly Cheesesteak, among other attractions.
Philadelphia is the sixth-most populous US city, with an estimated 1,574,281 residents as of July 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. The city dates back to 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.
Philadelphia has a population density of 4,324 people per km² — a moderately dense city. Seattle, with 2,005 people per km², is a moderately dense city. Philadelphia is noticeably denser, packing 2.2 times more people per square kilometer.
Density Gap
Philadelphia is 2.2x more densely populated
History
Philadelphia is ~169 years older
Philadelphia covers 370 km². Cities with a similar urban footprint include Seattle (369 km²), Dhaka (368 km²), Portland (376 km²), Atlanta (348 km²), or Denver (401 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 Philadelphia to Seattle is 3,819 km (2,373 miles), with an estimated flight time of ~4h 60m.
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