Philadelphia
370 km²
Riyadh
1,798 km²
United States
Saudi Arabia
Area Comparison
Philadelphia is 4.9x smaller than Riyadh
Population Comparison
Philadelphia has 4.4x fewer people than Riyadh
Yes — Riyadh is 4.9x larger than Philadelphia by area. Riyadh spans 1,798 km² (694 mi²) while Philadelphia covers 370 km² (143 mi²) — a difference of 1,428 km². You could fit Philadelphia inside Riyadh approximately 4 times.
To put Philadelphia's size in perspective, its area of 370 km² is about 1.6x smaller than Seoul. Meanwhile, Riyadh at 1,798 km² is about 1.1x the size of London.
Picture Philadelphia 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. Riyadh, by comparison, equals about 252,000 American football fields, 30 times the area of Manhattan, or 17 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.
Riyadh is the capital and largest city of Saudi Arabia. It is also the capital of the Riyadh Province and the centre of the Riyadh Governorate. Located on the eastern bank of Wadi Hanifa, the current form of the metropolis largely emerged in the 1950s as an expansion of the 18th-century walled town, following the dismantling of its defensive fortifications.
Riyadh has an area of 1,798 km² and is home to 7.0 million people. Its history stretches back to 1746. Visitors come for Kingdom Centre Tower, Masmak Fortress, Al Faisaliah Tower, and much more.
Riyadh is the capital and largest city of Saudi Arabia, sitting on the eastern bank of Wadi Hanifa.
Philadelphia has a population density of 4,324 people per km² — a moderately dense city. Riyadh, with 3,899 people per km², is a moderately dense city. Both cities have comparable density, though Philadelphia is slightly more compact.
Size Ratio
Philadelphia fits inside Riyadh ~4 times
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).
Riyadh covers 1,798 km². Cities with a similar urban footprint include Houston (1,725 km²), Johannesburg (1,644 km²), Shenzhen (1,997 km²), Bogotá (1,578 km²), or London (1,572 km²).
The straight-line distance from Philadelphia to Riyadh is 10,648 km (6,616 miles), with an estimated flight time of ~13h 2m.
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