San Antonio
1,209 km²
San Francisco
121 km²
United States
USA
Area Comparison
San Antonio is 10.0x larger than San Francisco
Population Comparison
San Antonio has 1.6x more people than San Francisco
San Antonio is significantly larger, covering 10.0 times the area of San Francisco. San Antonio spans 1,209 km² (467 mi²) while San Francisco covers 121 km² (47 mi²) — a difference of 1,088 km². You could fit San Francisco inside San Antonio approximately 9 times.
To put San Antonio's size in perspective, its area of 1,209 km² is about 1.3x smaller than London. Meanwhile, San Francisco at 121 km² is about 1.2x the size of Paris (city proper).
In more relatable units, San Antonio's 1,209 km² is about 169,000 American football fields, 20 times the area of Manhattan, or 11 times the area of Paris. 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.
San Antonio is a city in the U.S. state of Texas. It is the seventh-most populous city in the United States, the second-most populous city in Texas, and the second-most populous city in the Southern U.S., with a population of 1.43 million at the 2020 census. The Greater San Antonio metropolitan area, with an estimated 2.76 million residents, ranks as the third-largest metropolitan area in Texas and the 24th-largest in the nation. It is the county seat of Bexar County.
Known as "Alamo City", San Antonio covers 1,209 km² with a population of 1.4 million. The city was established in 1718. San Antonio is known for The Alamo, San Antonio River Walk, Tower of the Americas, among other attractions.
San Antonio is the seventh-most populous city in the United States and second-most populous in Texas, with 1.43 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.
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.
San Antonio has a population density of 1,183 people per km² — a relatively spread-out city. San Francisco, with 7,190 people per km², is a densely populated city. San Francisco is dramatically more crowded, with 6.1x the population density.
Size Ratio
San Francisco fits inside San Antonio ~9 times
Density Gap
San Francisco is 6.1x more densely populated
San Antonio covers 1,209 km². Cities with a similar urban footprint include Rio de Janeiro (1,221 km²), Lagos (1,172 km²), Rome (1,285 km²), Los Angeles (1,302 km²), or Hong Kong (1,114 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 San Antonio to San Francisco is 2,394 km (1,487 miles), with an estimated flight time of ~3h 19m.
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