Copenhagen
91 km²
Oslo
454 km²
Denmark
Norway
Area Comparison
Copenhagen is 5.0x smaller than Oslo
Population Comparison
Copenhagen has 1.1x fewer people than Oslo
Oslo is significantly larger, covering 5.0 times the area of Copenhagen. Oslo spans 454 km² (175 mi²) while Copenhagen covers 91 km² (35 mi²) — a difference of 363 km². You could fit Copenhagen inside Oslo approximately 4 times.
To put Copenhagen's size in perspective, its area of 91 km² is about 1.2x smaller than Paris (city proper). Meanwhile, Oslo at 454 km² is about 1.3x smaller than Seoul.
Copenhagen's footprint is roughly about 13,000 American football fields, 190 times the area of Vatican City, or 45 times the area of Monaco — pick whichever unit feels intuitive. Oslo, by comparison, equals about 64,000 American football fields, 130 times the area of Central Park, or 8 times the area of Manhattan.
Copenhagen is the capital and most populous city of both the country of Denmark and the wider Kingdom of Denmark, with a population of 667,000 people in the municipality and 1.4 million in the urban area. The city is situated mainly on the island of Zealand (Sjælland), with a smaller part on the island of Amager. Copenhagen is separated from Malmö, Sweden, by the Øresund strait. The Øresund Bridge connects the two cities by rail and road.
Known as "City of Spires", Copenhagen covers 91 km² with a population of 0.7 million. The city was established in 1167. Copenhagen is known for The Little Mermaid statue, Tivoli Gardens, Nyhavn waterfront, among other attractions.
Copenhagen sits mainly on the island of Zealand, with a smaller portion on the island of Amager.
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. Its history stretches 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.
Copenhagen has a population density of 7,363 people per km² — a densely populated city. Oslo, with 1,586 people per km², is a relatively spread-out city. Copenhagen is dramatically more crowded, with 4.6x the population density.
Size Ratio
Copenhagen fits inside Oslo ~4 times
Density Gap
Copenhagen is 4.6x more densely populated
History
Oslo is ~119 years older
Copenhagen covers 91 km². Cities with a similar urban footprint include Zurich (88 km²), Lisbon (100 km²), Barcelona (101 km²), Paris (105 km²), or Vancouver (115 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 Copenhagen to Oslo is 483 km (300 miles), with an estimated flight time of ~1h 4m.
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