City size comparison

compared to

San Francisco is about 3.8 times bigger than Naples.

Naples (map shows its 10 named neighbourhoods; the area covers the whole city) is approximately 32 sq km, while San Francisco (including the city proper only) is approximately 121 sq km, making San Francisco 280% larger than Naples.
Tip: This to-scale comparison of Naples 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. Naples

Flip Comparison · See true size
See San Francisco on top of Naples
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Cost of Living Comparison · 7 categories - 2026 data
Naples is 18.5% cheaper than San Francisco
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