Denver
401 km²
Oslo
454 km²
United States
Norway
Area Comparison
Denver is 1.1x smaller than Oslo
Population Comparison
Denver has 1.0x fewer people than Oslo
Oslo is significantly larger, covering 1.1 times the area of Denver. Oslo spans 454 km² (175 mi²) while Denver covers 401 km² (155 mi²) — a difference of 53 km².
To put Denver's size in perspective, its area of 401 km² is about 1.5x smaller than Seoul. Meanwhile, Oslo at 454 km² is about 1.3x smaller than Seoul.
Denver's footprint is roughly about 56,000 American football fields, 200 times the area of Monaco, or 120 times the area of Central Park — pick whichever unit feels intuitive. Oslo works out to about 64,000 American football fields, 130 times the area of Central Park, or 8 times the area of Manhattan.
Denver is the capital and most populous city of the U.S. state of Colorado. Officially a consolidated city and county, it is located in the South Platte River valley on the western edge of the High Plains, and is just east of the Front Range of the Rocky Mountains (Rockies). Denver is the 19th-most populous city in the United States and the fifth-most populous state capital, with a population of 715,522 at the 2020 census.
Known as "Mile High City", Denver covers 401 km² with a population of 0.7 million. The city was established in 1858. Denver is known for Red Rocks Amphitheatre, Denver Art Museum, Union Station, among other attractions.
Denver sits in the South Platte River valley just east of the Rocky Mountains' Front Range.
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.
Nicknamed "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.
Denver has a population density of 1,796 people per km² — a relatively spread-out city. Oslo, with 1,586 people per km², is a relatively spread-out city. Both cities have comparable density, though Denver is slightly more compact.
History
Oslo is ~810 years older
Denver covers 401 km². Cities with a similar urban footprint include Vienna (415 km²), Portland (376 km²), Philadelphia (370 km²), Seattle (369 km²), or Dhaka (368 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 Denver to Oslo is 7,484 km (4,650 miles), with an estimated flight time of ~9h 18m.
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