City size comparison

compared to

Boise is about 1.6 times smaller than Philadelphia.

Philadelphia is approximately 348 sq km, while Boise is approximately 221 sq km, making Boise 63.4% the size of Philadelphia.
Tip: This to-scale comparison of Philadelphia vs. Boise uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Boise vs. Philadelphia

Flip Comparison · See true size
See Boise on top of Philadelphia
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Cost of Living Comparison · 7 categories - 2026 data
Philadelphia is 17.1% more expensive than Boise
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