City size comparison

compared to

Boise is about 8 times bigger than Sydney.

Sydney is approximately 27 sq km, while Boise is approximately 221 sq km, making Boise 726% larger than Sydney.
Tip: This to-scale comparison of Sydney vs. Boise uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Boise vs. Sydney

Flip Comparison · See true size
See Boise on top of Sydney
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Cost of Living Comparison · 7 categories - 2026 data
Sydney is 29.5% more expensive than Boise
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