How Big Is Philadelphia?
United States
Area
370 km²
143 mi²
Population
1.6M
Density
4,324/km²
Founded
1682
Philadelphia Size Overview
Philadelphia covers an area of 370 km² (143 mi²) in United States. Most populous city in Pennsylvania, US. The city is often called "Philly". To put this in perspective, Philadelphia is about 1.6x smaller than Seoul. In more relatable units, that's 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.
With a population of 1.6 million, Philadelphia has a population density of 4,324 people per km².
Philadelphia has a history stretching back to 1682. The city is renowned for Liberty Bell, Independence Hall, Philly Cheesesteak, and Rocky Steps.
Did You Know?
- Philadelphia is the sixth-most populous US city, with an estimated 1,574,281 residents as of July 2025.
- The Philadelphia metropolitan area houses 6.33 million residents, ranking as the nation's ninth-largest metro.
- Founded in 1682, Philly remains a contemporary force in business, technology, sports, music, and cuisine.
Cities Similar in Size to Philadelphia
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).