Oslo
454 km²
Phoenix
1,341 km²
Norway
United States
Area Comparison
Oslo is 3.0x smaller than Phoenix
Population Comparison
Oslo has 2.2x fewer people than Phoenix
Yes — Phoenix is 3.0x larger than Oslo by area. Phoenix spans 1,341 km² (518 mi²) while Oslo covers 454 km² (175 mi²) — a difference of 887 km². You could fit Oslo inside Phoenix approximately 2 times.
To put Oslo's size in perspective, its area of 454 km² is about 1.3x smaller than Seoul. Meanwhile, Phoenix at 1,341 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. Phoenix, by comparison, equals about 188,000 American football fields, 23 times the area of Manhattan, or 13 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.
Phoenix is the capital and most populous city of the U.S. state of Arizona. With over 1.6 million residents at the 2020 census, Phoenix is the fifth-most populous city in the United States and the most populous state capital. The Phoenix metropolitan area, with an estimated 5.19 million residents, is the tenth-most populous metropolitan area in the U.S. and the most populous in the Mountain states and Southwest.
Also known as "Valley of the Sun", Phoenix has an area of 1,341 km² and is home to 1.6 million people. The city dates back to 1868. Visitors come for Camelback Mountain, Desert Botanical Garden, Heard Museum, and much more.
Phoenix is the most populous U.S. state capital and the fifth-largest city in the country with 1.6 million residents.
Oslo has a population density of 1,586 people per km² — a relatively spread-out city. Phoenix, with 1,201 people per km², is a relatively spread-out city. Both cities have comparable density, though Oslo is slightly more compact.
Size Ratio
Oslo fits inside Phoenix ~2 times
Density Gap
Oslo is 1.3x more densely populated
History
Oslo is ~820 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).
Phoenix covers 1,341 km². Cities with a similar urban footprint include Los Angeles (1,302 km²), Rome (1,285 km²), Rio de Janeiro (1,221 km²), Delhi (1,484 km²), or Mexico City (1,485 km²).
The straight-line distance from Oslo to Phoenix is 8,396 km (5,217 miles), with an estimated flight time of ~10h 23m.
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