Oslo
454 km²
San Diego
964 km²
Norway
United States
Area Comparison
Oslo is 2.1x smaller than San Diego
Population Comparison
Oslo has 1.9x fewer people than San Diego
Yes — San Diego is 2.1x larger than Oslo by area. San Diego spans 964 km² (372 mi²) while Oslo covers 454 km² (175 mi²) — a difference of 510 km². You could fit Oslo inside San Diego approximately 2 times.
To put Oslo's size in perspective, its area of 454 km² is about 1.3x smaller than Seoul. Meanwhile, San Diego at 964 km² is roughly the same size as Berlin.
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. San Diego works out to about 135,000 American football fields, 16 times the area of Manhattan, or 9 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.
San Diego is a city on the Pacific coast of Southern California, adjacent to the Mexico–United States border. It is the eighth-most populous city in the U.S. and second-most populous city in California with a population of over 1.4 million, while the San Diego metropolitan area with over 3.3 million residents is the 18th-largest metropolitan area in the country. San Diego is the county seat of San Diego County.
Nicknamed "America's Finest City", San Diego has an area of 964 km² and is home to 1.4 million people. The city dates back to 1769. Visitors come for San Diego Zoo, Balboa Park, Coronado Beach, and much more.
San Diego sits directly on the Mexico-United States border, making it California's southwesternmost major city.
Oslo has a population density of 1,586 people per km² — a relatively spread-out city. San Diego, with 1,442 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 San Diego ~2 times
History
Oslo is ~721 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).
San Diego covers 964 km². Cities with a similar urban footprint include Abu Dhabi (972 km²), Dallas (997 km²), Berlin (892 km²), Santiago (838 km²), or Hong Kong (1,114 km²).
The straight-line distance from Oslo to San Diego is 8,669 km (5,387 miles), with an estimated flight time of ~10h 42m.
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