Hanoi
3,359 km²
Oslo
454 km²
Vietnam
Norway
Area Comparison
Hanoi is 7.4x larger than Oslo
Population Comparison
Hanoi has 11.2x more people than Oslo
In terms of area, Hanoi is 7.4x the size of Oslo. Hanoi spans 3,359 km² (1,297 mi²) while Oslo covers 454 km² (175 mi²) — a difference of 2,905 km². You could fit Oslo inside Hanoi approximately 7 times.
To put Hanoi's size in perspective, its area of 3,359 km² is about 1.2x smaller than Rhode Island. Meanwhile, Oslo at 454 km² is about 1.3x smaller than Seoul.
Picture Hanoi another way: its area is large enough to fit about 470,000 American football fields, 57 times the area of Manhattan, or 32 times the area of Paris. For Oslo, that's about 64,000 American football fields, 130 times the area of Central Park, or 8 times the area of Manhattan.
Hanoi is the capital and second-most populous municipality of Vietnam. It encompasses an area of 3,358.6 km2 (1,296.8 mi2), and as of 2025 has a population of 8,807,523. Hanoi had the second-highest gross regional domestic product of all Vietnamese provinces and municipalities at US$48 billion in 2023, behind Ho Chi Minh City. It hosts 78 foreign embassies, the headquarters of the Vietnam People's Army (VPA), its Vietnam National University system, and other governmental organizations.
Known as "City Between Rivers", Hanoi covers 3,359 km² with a population of 8.1 million. The city was established in 1010. Hanoi is known for Hoan Kiem Lake, Old Quarter, Temple of Literature, among other attractions. The city's main transit system is the Hanoi Metro.
Hanoi encompasses 3,358.6 square kilometers and had a population of nearly 8.8 million as of 2025.
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.
Also known as "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.
Hanoi has a population density of 2,397 people per km² — a moderately dense city. Oslo, with 1,586 people per km², is a relatively spread-out city. Hanoi is noticeably denser, packing 1.5 times more people per square kilometer.
Size Ratio
Oslo fits inside Hanoi ~7 times
Density Gap
Hanoi is 1.5x more densely populated
Hanoi covers 3,359 km². Cities with a similar urban footprint include Karachi (3,527 km²), Cairo (3,085 km²), Dubai (4,114 km²), Lima (2,672 km²), or Moscow (2,511 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 Hanoi to Oslo is 8,273 km (5,141 miles), with an estimated flight time of ~10h 14m.
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