City size comparison

compared to

San Francisco is about 1.8 times smaller than Boise.

Boise is approximately 221 sq km, while San Francisco (including the city proper only) is approximately 121 sq km, making San Francisco 54.86% the size of Boise.
Tip: This to-scale comparison of Boise 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. Boise

Flip Comparison · See true size
See San Francisco on top of Boise
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Cost of Living Comparison · 7 categories - 2026 data
Boise is 31.7% cheaper than San Francisco
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