San Francisco is around the same size as West Palm Beach.

West Palm Beach (map shows its 34 named neighbourhoods; the area covers the whole city) is approximately 140 sq km, while San Francisco (including the city proper only) is approximately 121 sq km, making San Francisco 86.72% the size of West Palm Beach.
Tip: This to-scale comparison of West Palm Beach vs. San Francisco uses the Mercator projection, which distorts the size of regions near the poles.
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