Brussels
161 km²
Oslo
454 km²
Belgium
Norway
Area Comparison
Brussels is 2.8x smaller than Oslo
Population Comparison
Brussels has 1.8x more people than Oslo
In terms of area, Oslo is 2.8x the size of Brussels. Oslo spans 454 km² (175 mi²) while Brussels covers 161 km² (62 mi²) — a difference of 293 km². You could fit Brussels inside Oslo approximately 2 times.
To put Brussels's size in perspective, its area of 161 km² is roughly the same size as Washington D.C.. Meanwhile, Oslo at 454 km² is about 1.3x smaller than Seoul.
Picture Brussels another way: its area is large enough to fit about 23,000 American football fields, 80 times the area of Monaco, or 47 times the area of Central Park. For Oslo, that's about 64,000 American football fields, 130 times the area of Central Park, or 8 times the area of Manhattan.
Brussels, officially the Brussels-Capital Region, is a region of Belgium comprising 19 municipalities, including the City of Brussels, which is the capital of Belgium. The Brussels-Capital Region is located in the central portion of the country. It is a part of both the French Community of Belgium and the Flemish Community, and is separate from the Flemish Region (Flanders), within which it forms an enclave, and the Walloon Region (Wallonia), located less than 4 km (2.5 mi) south.
Known as "Capital of Europe", Brussels covers 161 km² with a population of 1.3 million. The city was established in 1989. Brussels is known for Grand Place, Manneken Pis, Atomium, among other attractions.
The Brussels-Capital Region comprises 19 municipalities and forms an enclave entirely within the Flemish Region.
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. 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.
Brussels has a population density of 7,826 people per km² — a densely populated city. Oslo, with 1,586 people per km², is a relatively spread-out city. Brussels is dramatically more crowded, with 4.9x the population density.
Size Ratio
Brussels fits inside Oslo ~2 times
Density Gap
Brussels is 4.9x more densely populated
History
Oslo is ~941 years older
Brussels covers 161 km². Cities with a similar urban footprint include Minneapolis (149 km²), Washington D.C. (177 km²), Miami (143 km²), Stockholm (188 km²), or Buenos Aires (203 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 Brussels to Oslo is 1,085 km (674 miles), with an estimated flight time of ~1h 47m.
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