City size comparison

compared to

Cologne is about 3.4 times bigger than San Francisco.

San Francisco (including the city proper only) is approximately 121 sq km, while Cologne is approximately 405 sq km, making Cologne 235% larger than San Francisco.
Tip: This to-scale comparison of San Francisco vs. Cologne uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Cologne vs. San Francisco

Flip Comparison · See true size
See Cologne on top of San Francisco
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Cost of Living Comparison · 7 categories - 2026 data
San Francisco is 67.3% more expensive than Cologne
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