Oslo
454 km²
Rome
1,285 km²
Norway
Italy
Area Comparison
Oslo is 2.8x smaller than Rome
Population Comparison
Oslo has 4.0x fewer people than Rome
Rome is significantly larger, covering 2.8 times the area of Oslo. Rome spans 1,285 km² (496 mi²) while Oslo covers 454 km² (175 mi²) — a difference of 831 km². You could fit Oslo inside Rome approximately 2 times.
To put Oslo's size in perspective, its area of 454 km² is about 1.3x smaller than Seoul. Meanwhile, Rome at 1,285 km² is about 1.2x smaller than London.
In more relatable units, Oslo's 454 km² is about 64,000 American football fields, 130 times the area of Central Park, or 8 times the area of Manhattan. Rome works out to about 180,000 American football fields, 22 times the area of Manhattan, or 12 times the area of Paris.
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.
Known as "Tigerstaden", Oslo covers 454 km² with a population of 0.7 million. The city was established in 1048. Oslo is known for Vigeland Park, Oslo Opera House, Akershus Fortress, among other attractions.
Oslo is both a county and a municipality, with the city itself home to about 724,000 residents in 2025.
Rome is the capital city and most populated comune (municipality) of Italy. It is also the administrative centre of the Lazio region and of the Metropolitan City of Rome. A special comune named Roma Capitale with a population of 2.7 million in an area of 1,287.36 km2 (497.1 mi2), Rome is the third most populous city in the European Union by population within city limits. The Metropolitan City of Rome Capital, with a population of 4.2 million, is the most populous metropolitan city in Italy.
Often called "The Eternal City", Rome has an area of 1,285 km² and is home to 2.9 million people. It was founded around 753 BC. Visitors come for Colosseum, Vatican City, Trevi Fountain, and much more. Getting around is easy with the Rome Metro.
Rome's special comune Roma Capitale spans 1,287 km2, making it the third most populous city in the EU within city limits
Oslo has a population density of 1,586 people per km² — a relatively spread-out city. Rome, with 2,233 people per km², is a moderately dense city. Both cities have comparable density, though Rome is slightly more compact.
Size Ratio
Oslo fits inside Rome ~2 times
Density Gap
Rome is 1.4x more densely populated
History
Rome is ~1,801 years older
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).
Rome covers 1,285 km². Cities with a similar urban footprint include Los Angeles (1,302 km²), Phoenix (1,341 km²), Rio de Janeiro (1,221 km²), San Antonio (1,209 km²), or Lagos (1,172 km²).
The straight-line distance from Oslo to Rome is 2,006 km (1,247 miles), with an estimated flight time of ~2h 52m.
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