City size comparison

compared to

Sydney is about 8 times smaller than Boise.

Boise is approximately 221 sq km, while Sydney is approximately 27 sq km, making Sydney 12.11% the size of Boise.
Tip: This to-scale comparison of Boise vs. Sydney uses the Mercator projection, which distorts the size of regions near the poles.
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Compare further: Sydney vs. Boise

Flip Comparison · See true size
See Sydney on top of Boise
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Cost of Living Comparison · 7 categories - 2026 data
Boise is 7.6% cheaper than Sydney
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