Mumbai
603 km²
San Francisco
121 km²
India
USA
Area Comparison
Mumbai is 5.0x larger than San Francisco
Population Comparison
Mumbai has 14.3x more people than San Francisco
Mumbai is significantly larger, covering 5.0 times the area of San Francisco. Mumbai spans 603 km² (233 mi²) while San Francisco covers 121 km² (47 mi²) — a difference of 482 km². You could fit San Francisco inside Mumbai approximately 4 times.
To put Mumbai's size in perspective, its area of 603 km² is roughly the same size as Seoul. Meanwhile, San Francisco at 121 km² is about 1.2x the size of Paris (city proper).
Mumbai's footprint is roughly about 84,000 American football fields, 180 times the area of Central Park, or 10 times the area of Manhattan — pick whichever unit feels intuitive. San Francisco, by comparison, equals about 17,000 American football fields, 60 times the area of Monaco, or 35 times the area of Central Park.
Mumbai, also known as Bombay, is the capital city of the Indian state of Maharashtra. Mumbai is the financial capital and the most populous city proper of India, with an estimated population of 12.5 million (1.25 crore). Mumbai is the centre of the Mumbai Metropolitan Region, which is among the most populous metropolitan areas in the world with a population of over 23 million. Mumbai lies on the Konkan coast on the west coast of India and has a deep natural harbour.
Known as "Bombay", Mumbai covers 603 km² with a population of 12.4 million. The city was established in 1507. Mumbai is known for Gateway of India, Marine Drive, Bollywood, among other attractions. The city's main transit system is the Mumbai Suburban Railway.
Mumbai is the most populous city proper in India and serves as the country's financial capital with around 12.5 million residents.
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.
Looking beyond city limits, the San Francisco metropolitan area covers 6,984 km², which is 1.1x larger than greater Mumbai at 6,355 km². The Mumbai metro area is also more populous, with 20.7 million people compared to 4.7 million.
Mumbai has a population density of 20,630 people per km² — one of the most densely packed urban areas on Earth. San Francisco, with 7,190 people per km², is a densely populated city. Mumbai is noticeably denser, packing 2.9 times more people per square kilometer.
This comparison spans continents — Mumbai in Asia versus San Francisco in North America. Despite the geographic distance, comparing their sizes reveals surprising insights about how cities grow worldwide.
Mumbai has a tropical wet and dry climate while San Francisco experiences Mediterranean conditions. Summers are notably different: Mumbai averages 30°C compared to 17°C in San Francisco. When it's noon in Mumbai, it's midnight in San Francisco — a 13.5-hour time difference.
Size Ratio
San Francisco fits inside Mumbai ~4 times
Density Gap
Mumbai is 2.9x more densely populated
Time Difference
13.5 hours apart
History
Mumbai is ~269 years older
Mumbai covers 603 km². Cities with a similar urban footprint include Madrid (604 km²), Seoul (605 km²), Chicago (606 km²), Toronto (630 km²), or Hyderabad (650 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 Mumbai to San Francisco is 13,494 km (8,385 miles), with an estimated flight time of ~16h 23m.
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