Chicago
606 km²
Oslo
454 km²
USA
Norway
Area Comparison
Chicago is 1.3x larger than Oslo
Population Comparison
Chicago has 3.8x more people than Oslo
In terms of area, Chicago is 1.3x the size of Oslo. Chicago spans 606 km² (234 mi²) while Oslo covers 454 km² (175 mi²) — a difference of 152 km².
To put Chicago's size in perspective, its area of 606 km² is roughly the same size as Seoul. Meanwhile, Oslo at 454 km² is about 1.3x smaller than Seoul.
Chicago's footprint is roughly about 85,000 American football fields, 180 times the area of Central Park, or 10 times the area of Manhattan — pick whichever unit feels intuitive. For Oslo, that's about 64,000 American football fields, 130 times the area of Central Park, or 8 times the area of Manhattan.
Chicago is the most populous city in the U.S. state of Illinois and in the Midwestern United States. Located on the western shore of Lake Michigan, it is the third-most populous city in the United States, with a population of 2.74 million at the 2020 census. The Chicago metropolitan area has 9.41 million residents and is the third-largest metropolitan area in the country. Chicago is the seat of Cook County, the second-most populous county in the U.S.
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 Willis Tower, Millennium Park Bean, Navy Pier, among other attractions. The city's main transit system is the CTA (L train).
Chicago is the third-most populous city in the United States with 2.74 million residents at the 2020 census.
Oslo is the capital and most populous city of Norway. It constitutes both a county and a municipality. The municipality of Oslo had a population of 724,290 in 2025, while the city's greater urban area had a population of 1,110,887 in 2025, and the metropolitan area had an estimated population of 1,546,706 in 2021.
Often called "Tigerstaden", Oslo has an area of 454 km² and is home to 0.7 million people. The city dates back to 1048. Visitors come for Vigeland Park, Oslo Opera House, Akershus Fortress, and much more.
Oslo is both a county and a municipality, with the city itself home to about 724,000 residents in 2025.
Chicago has a population density of 4,455 people per km² — a moderately dense city. Oslo, with 1,586 people per km², is a relatively spread-out city. Chicago is noticeably denser, packing 2.8 times more people per square kilometer.
Density Gap
Chicago is 2.8x more densely populated
History
Oslo is ~785 years older
Chicago covers 606 km². Cities with a similar urban footprint include Seoul (605 km²), Madrid (604 km²), Mumbai (603 km²), Toronto (630 km²), or Hyderabad (650 km²).
Oslo covers 454 km². Cities with a similar urban footprint include Prague (496 km²), Vienna (415 km²), Montreal (498 km²), Denver (401 km²), or Warsaw (517 km²).
The straight-line distance from Chicago to Oslo is 6,499 km (4,038 miles), with an estimated flight time of ~8h 9m.
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