Istanbul
5,461 km²
San Francisco
121 km²
Turkey
USA
Area Comparison
Istanbul is 45.1x larger than San Francisco
Population Comparison
Istanbul has 17.8x more people than San Francisco
In terms of area, Istanbul is 45.1x the size of San Francisco. Istanbul spans 5,461 km² (2,109 mi²) while San Francisco covers 121 km² (47 mi²) — a difference of 5,340 km². You could fit San Francisco inside Istanbul approximately 45 times.
To put Istanbul's size in perspective, its area of 5,461 km² is about 1.2x smaller than Shanghai. Meanwhile, San Francisco at 121 km² is about 1.2x the size of Paris (city proper).
Istanbul's footprint is roughly about 765,000 American football fields, 92 times the area of Manhattan, or 52 times the area of Paris — 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.
Istanbul is the largest city in Turkey, constituting the country's economic, cultural, and historical center. With a population of over 15 million, it is home to 18% of the population of Turkey. Istanbul is among the largest cities in Europe and in the world by population. It is a city on two continents; about two-thirds of its population live in Europe and the rest in Asia.
Known as "City on Two Continents", Istanbul covers 5,461 km² with a population of 15.5 million. The city was founded around 660 BC. Istanbul is known for Hagia Sophia, Blue Mosque, Grand Bazaar, among other attractions. The city's main transit system is the Istanbul Metro.
Istanbul is one of the only major cities to span two continents, with about two-thirds of its population living in Europe and the rest in Asia.
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.
Often called "The City by the Bay", San Francisco has an area of 121 km² and is home to 0.9 million people. The city dates 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.
Looking beyond city limits, the San Francisco metropolitan area covers 6,984 km², which is 1.3x larger than greater Istanbul at 5,461 km². The Istanbul metro area is also more populous, with 15.5 million people compared to 4.7 million.
Istanbul has a population density of 2,831 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.
This comparison spans continents — Istanbul in Europe versus San Francisco in North America. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Istanbul has a oceanic climate while San Francisco experiences Mediterranean conditions. When it's noon in Istanbul, it's 1:00 AM in San Francisco — a 11-hour time difference.
Size Ratio
San Francisco fits inside Istanbul ~45 times
Density Gap
San Francisco is 2.5x more densely populated
Time Difference
11 hours apart
History
Istanbul is ~2,436 years older
Istanbul covers 5,461 km². Cities with a similar urban footprint include Shanghai (6,341 km²), Perth (6,417 km²), Dubai (4,114 km²), Guangzhou (7,434 km²), or Karachi (3,527 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 Istanbul to San Francisco is 10,785 km (6,702 miles), with an estimated flight time of ~13h 11m.
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