City size comparison

compared to

San Francisco is about 5 times smaller than Seoul.

Seoul is approximately 605 sq km, while San Francisco (including the city proper only) is approximately 121 sq km, making San Francisco 19.99% the size of Seoul.
Tip: This to-scale comparison of Seoul vs. San Francisco uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: San Francisco vs. Seoul

Flip Comparison · See true size
See San Francisco on top of Seoul
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Cost of Living Comparison · 7 categories - 2026 data
Seoul is 45.7% cheaper than San Francisco
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