Philadelphia
370 km²
Rome
1,285 km²
United States
Italy
Area Comparison
Philadelphia is 3.5x smaller than Rome
Population Comparison
Philadelphia has 1.8x fewer people than Rome
Yes — Rome is 3.5x larger than Philadelphia by area. Rome spans 1,285 km² (496 mi²) while Philadelphia covers 370 km² (143 mi²) — a difference of 915 km². You could fit Philadelphia inside Rome approximately 3 times.
To put Philadelphia's size in perspective, its area of 370 km² is about 1.6x smaller than Seoul. Meanwhile, Rome at 1,285 km² is about 1.2x smaller than London.
In more relatable units, Philadelphia's 370 km² is about 52,000 American football fields, 180 times the area of Monaco, or 110 times the area of Central Park. Rome works out to about 180,000 American football fields, 22 times the area of Manhattan, or 12 times the area of Paris.
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.
Rome is the capital city and most populated comune (municipality) of Italy. It is also the administrative centre of the Lazio region and of the Metropolitan City of Rome. A special comune named Roma Capitale with a population of 2.7 million in an area of 1,287.36 km2 (497.1 mi2), Rome is the third most populous city in the European Union by population within city limits. The Metropolitan City of Rome Capital, with a population of 4.2 million, is the most populous metropolitan city in Italy.
Also known as "The Eternal City", Rome has an area of 1,285 km² and is home to 2.9 million people. Its history stretches back to 753 BC. Visitors come for Colosseum, Vatican City, Trevi Fountain, and much more. Getting around is easy with the Rome Metro.
Rome's special comune Roma Capitale spans 1,287 km2, making it the third most populous city in the EU within city limits
Philadelphia has a population density of 4,324 people per km² — a moderately dense city. Rome, with 2,233 people per km², is a moderately dense city. Philadelphia is noticeably denser, packing 1.9 times more people per square kilometer.
Size Ratio
Philadelphia fits inside Rome ~3 times
Density Gap
Philadelphia is 1.9x more densely populated
History
Rome is ~2,435 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).
Rome covers 1,285 km². Cities with a similar urban footprint include Los Angeles (1,302 km²), Phoenix (1,341 km²), Rio de Janeiro (1,221 km²), San Antonio (1,209 km²), or Lagos (1,172 km²).
The straight-line distance from Philadelphia to Rome is 7,018 km (4,361 miles), with an estimated flight time of ~8h 45m.
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