Oslo
454 km²
Washington D.C.
177 km²
Norway
USA
Area Comparison
Oslo is 2.6x larger than Washington D.C.
Population Comparison
Oslo has 1.0x more people than Washington D.C.
Oslo is significantly larger, covering 2.6 times the area of Washington D.C.. Oslo spans 454 km² (175 mi²) while Washington D.C. covers 177 km² (68 mi²) — a difference of 277 km². You could fit Washington D.C. inside Oslo approximately 2 times.
To put Oslo's size in perspective, its area of 454 km² is about 1.3x smaller than Seoul. Meanwhile, Washington D.C. at 177 km² is roughly the same size as Washington D.C..
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. Washington D.C., by comparison, equals about 25,000 American football fields, 88 times the area of Monaco, or 52 times the area of Central Park.
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.
Washington, D.C., officially the District of Columbia and commonly known as simply Washington or D.C., is the capital city and federal district of the United States. The city is on the Potomac River across from Virginia and shares land borders with Maryland to its north and east. It was named after George Washington, a Founding Father and the first president of the United States.
Nicknamed "D.C.", Washington D.C. has an area of 177 km² and is home to 0.7 million people. Its history stretches back to 1790. Visitors come for White House, U.S. Capitol, Lincoln Memorial, and much more. Getting around is easy with the Washington Metro.
Washington D.C. sits on the Potomac River across from Virginia and is bordered by Maryland to its north and east
Oslo has a population density of 1,586 people per km² — a relatively spread-out city. Washington D.C., with 3,898 people per km², is a moderately dense city. Washington D.C. is noticeably denser, packing 2.5 times more people per square kilometer.
Size Ratio
Washington D.C. fits inside Oslo ~2 times
Density Gap
Washington D.C. is 2.5x more densely populated
History
Oslo is ~742 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).
Washington D.C. covers 177 km². Cities with a similar urban footprint include Stockholm (188 km²), Brussels (161 km²), Buenos Aires (203 km²), Minneapolis (149 km²), or Helsinki (214 km²).
The straight-line distance from Oslo to Washington D.C. is 6,232 km (3,872 miles), with an estimated flight time of ~7h 50m.
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