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USA
Iran
Area Comparison
Chicago is 1.2x smaller than Tehran
Population Comparison
Chicago has 3.4x fewer people than Tehran
Tehran is significantly larger, covering 1.2 times the area of Chicago. Tehran spans 730 km² (282 mi²) while Chicago covers 606 km² (234 mi²) — a difference of 124 km².
To put Chicago's size in perspective, its area of 606 km² is roughly the same size as Seoul. Meanwhile, Tehran at 730 km² is roughly the same size as New York City.
Third-largest city in the United States. Known as "The Windy City", Chicago covers 606 km² with a population of 2.7 million. The city was established in 1833. Chicago is known for Deep-dish pizza, Willis Tower, Millennium Park & Cloud Gate, among other attractions. The city's main transit system is the CTA (L train).
Chicago reversed the flow of the Chicago River in 1900, an engineering feat that still stands
Iran's capital and largest city. Often called "The City of 72 Nations", Tehran has an area of 730 km² and is home to 9.1 million people. It was established in 1524. Visitors come for Golestan Palace, Grand Bazaar, Milad Tower, and much more. Getting around is easy with the Tehran Metro.
Tehran sits at the foot of Mount Damavand, the highest volcano in Asia at 5,610 meters
Looking beyond city limits, the Chicago metropolitan area covers 28,160 km², which is 12.6x larger than greater Tehran at 2,235 km². The Tehran metro area is also more populous, with 16.0 million people compared to 9.5 million.
Chicago has a population density of 4,455 people per km² — a moderately dense city. Tehran, with 12,507 people per km², is an extremely dense urban environment. Tehran is noticeably denser, packing 2.8 times more people per square kilometer.
This comparison spans continents — Chicago in North America versus Tehran in Asia. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Chicago has a humid continental climate while Tehran experiences hot-summer Mediterranean conditions. When it's noon in Tehran, it's 2.5:00 AM in Chicago — a 9.5-hour time difference.
Density Gap
Tehran is 2.8x more densely populated
Time Difference
9.5 hours apart
History
Tehran is ~309 years older
The straight-line distance from Chicago to Tehran is 10,435 km (6,484 miles), with an estimated flight time of ~12h 47m. See full distance details, including timezone difference and city facts.
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