Prague
496 km²
San Francisco
121 km²
Czech Republic
USA
Area Comparison
Prague is 4.1x larger than San Francisco
Population Comparison
Prague has 1.6x more people than San Francisco
Prague is significantly larger, covering 4.1 times the area of San Francisco. Prague spans 496 km² (192 mi²) while San Francisco covers 121 km² (47 mi²) — a difference of 375 km². You could fit San Francisco inside Prague approximately 4 times.
To put Prague's size in perspective, its area of 496 km² is about 1.2x smaller than Seoul. Meanwhile, San Francisco at 121 km² is about 1.2x the size of Paris (city proper).
Prague's footprint is roughly about 69,000 American football fields, 150 times the area of Central Park, or 8 times the area of Manhattan — pick whichever unit feels intuitive. San Francisco works out to about 17,000 American football fields, 60 times the area of Monaco, or 35 times the area of Central Park.
Prague is the capital and largest city of the Czech Republic and the historical capital of Bohemia. Located on the Vltava River, the city has a population of about 1.4 million, making it the twelfth-largest city in the European Union. Its metropolitan area is home to approximately 2.3 million people.
Known as "The City of a Hundred Spires", Prague covers 496 km² with a population of 1.4 million. The city was established in 800. Prague is known for Charles Bridge, Prague Castle, Old Town Square, among other attractions.
Prague is the historical capital of Bohemia and today serves as the Czech Republic's capital and largest city.
San Francisco, officially the City and County of San Francisco, is the fourth-most populous city in California and the 17th-most populous in the United States, with a population of 826,079 in 2025. Among U.S. cities with a population of 300,000 or more, San Francisco is ranked first by per capita income, second by population density, and sixth by aggregate income as of 2023.
Also known as "The City by the Bay", San Francisco has an area of 121 km² and is home to 0.9 million people. Its history stretches back to 1776. Visitors come for Golden Gate Bridge, Alcatraz Island, Cable cars, and much more. Getting around is easy with the BART & Muni.
San Francisco ranks first by per capita income among all US cities with 300,000+ residents as of 2023.
Prague has a population density of 2,823 people per km² — a moderately dense city. San Francisco, with 7,190 people per km², is a densely populated city. San Francisco is noticeably denser, packing 2.5 times more people per square kilometer.
Size Ratio
San Francisco fits inside Prague ~4 times
Density Gap
San Francisco is 2.5x more densely populated
History
Prague is ~976 years older
Prague covers 496 km². Cities with a similar urban footprint include Montreal (498 km²), Warsaw (517 km²), Budapest (525 km²), Oslo (454 km²), or Auckland (559 km²).
San Francisco covers 121 km². Cities with a similar urban footprint include Vancouver (115 km²), Paris (105 km²), Miami (143 km²), Barcelona (101 km²), or Lisbon (100 km²).
The straight-line distance from Prague to San Francisco is 9,370 km (5,822 miles), with an estimated flight time of ~11h 31m.
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