Atlanta
348 km²
Philadelphia
370 km²
United States
United States
Area Comparison
Atlanta is 1.1x smaller than Philadelphia
Population Comparison
Atlanta has 3.2x fewer people than Philadelphia
Philadelphia is significantly larger, covering 1.1 times the area of Atlanta. Philadelphia spans 370 km² (143 mi²) while Atlanta covers 348 km² (134 mi²) — a difference of 22 km².
To put Atlanta's size in perspective, its area of 348 km² is about 1.6x the size of Amsterdam. Meanwhile, Philadelphia at 370 km² is about 1.6x smaller than Seoul.
Atlanta's footprint is roughly about 49,000 American football fields, 170 times the area of Monaco, or 100 times the area of Central Park — pick whichever unit feels intuitive. Philadelphia works out to about 52,000 American football fields, 180 times the area of Monaco, or 110 times the area of Central Park.
Atlanta is the capital and most populous city of the U.S. state of Georgia. It is the county seat of Fulton County and extends into neighboring DeKalb County. With a population of 498,715 at the 2020 census and an estimated 520,070 in 2024, Atlanta is the eighth-most populous city in the Southeast and the 36th-most populous city in the United States. Atlanta is classified as a Beta+ global city.
Known as "The ATL", Atlanta covers 348 km² with a population of 0.5 million. The city was established in 1845. Atlanta is known for Coca-Cola headquarters, Hartsfield-Jackson Airport, Georgia Aquarium, among other attractions.
Atlanta is Georgia's capital and most populous city, with around 520,070 residents estimated in 2024.
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.
Also known as "Philly", Philadelphia has an area of 370 km² and is home to 1.6 million people. Its history stretches back to 1682. Visitors come for Liberty Bell, Independence Hall, Philly Cheesesteak, and much more.
Philadelphia is the sixth-most populous US city, with an estimated 1,574,281 residents as of July 2025.
Atlanta has a population density of 1,437 people per km² — a relatively spread-out city. Philadelphia, with 4,324 people per km², is a moderately dense city. Philadelphia is dramatically more crowded, with 3.0x the population density.
Density Gap
Philadelphia is 3.0x more densely populated
History
Philadelphia is ~163 years older
Atlanta covers 348 km². Cities with a similar urban footprint include Dhaka (368 km²), Seattle (369 km²), Philadelphia (370 km²), Portland (376 km²), or Munich (311 km²).
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).
The straight-line distance from Atlanta to Philadelphia is 1,071 km (666 miles), with an estimated flight time of ~1h 46m.
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